LVFS 2010:17

Läkemedelsverkets kungörelse (LVFS 2010:17) om ikraftträdande av reviderade monografier för heparinnatrium och heparinkalcium i Europafarmakopén;

Titel: Läkemedelsverkets kungörelse (LVFS 2010:17) (LVFS 2010:17) om ikraftträdande av reviderade monografier för heparinnatrium och heparinkalcium i Europafarmakopén;
Utgivare: Läkemedelsverket
Normkedja: 32011L0062 → SFS 1992:859 → SFS 2006:272 → LVFS 2010:17
Beslutad: 2010-06-28
Ikraftträdande: 2010-08-01
Källa: www.lakemedelsverket.se

Bemyndigande

10 kap. 5 § Läkemedelsförordning (2006:272)

heparinkalcium i Europafarmakopén;

beslutad den 28 juni 2010. Med stöd av 10 kap. 5 § läkemedelsförordningen (2006:272) beslutar Läkemedelsverket på förslag av Svenska farmakopékommittén att monografi för heparinnatrium (Heparin sodium (no 0333)) och för heparinkalcium (Heparin calcium (no 0332)) i Supplement 6.4 till sjätte utgåvan av Europafarmakopén (European Pharmacopoeia 6.0) ska ersättas med monografier enligt bilaga 1 och 2 till denna kungörelse från den dag denna författning träder i kraft. Denna författning träder i kraft den 1 augusti 2010. Läkemedelsverket MATS LARSSON Joakim Brandberg

PA/PH/Exp. 6/T (09) 42 PUB

Bilaga 1

NOTE ON THE MONOGRAPH

This monograph has been thoroughly revised further to the contamination events in 2008 to ensure appropriate quality control for unfractionated heparin. The style and presentation have also been updated in line with the current version of the Style guide. Definition: the minimum potency limit has been raised after an enquiry among European manufacturers regarding the quality of currently marketed heparin batches ; only 1 grade of heparin has been kept as the present 2-tiered specification no longer reflects the situation in Europe. Production: the tests for nuclear magnetic resonance spectrometry (NMR) and capillary

electrophoresis previously introduced in the 1 -step revision applicable from 1 August 2008 have been deleted, as detailed tests are now provided under Identification and Tests ; statements have been added to emphasise the need for a reliable quality management system throughout production and, based on current practice among European manufacturers, for confirming the identity of the source species as well as the absence of any material issued from other species likely to contaminate the drug substance. This monograph is also revised to harmonise the information related to the source species for substances of human and animal origin and its presentation in monographs. The statement relative to the origin of the substance is moved under Definition accordingly and a paragraph is added regarding the health of the animals used for the preparation of heparin sodium. Identification: the tests for specific optical rotation and zone electrophoresis have been replaced by the highly specific H-NMR and strong anion-exchange liquid chromatography (SAX-HPLC) tests ; H-NMR has been selected for its ability not only to allow identification of heparin, but also to alert users to possible contaminations ; identification of the counterion is now based on the test for sodium by atomic absorption spectrometry described under Tests. Nucleotidic impurities: the limit has been tightened, based on current batch data. Protein: the Lowry test method has been introduced to replace the absorbance test. Related substances: a SAX-HPLC-based test has been introduced, allowing the differentiation of natural contaminants linked to the production process (such as dermatan sulfate and chondroitin sulfate) from chemically synthesised contaminants ; a limit for the sum of dermatan sulfate and chondroitin sulfate, which co-elute in this method, is proposed, further to consideration of current batch data. Nitrogen: a lower limit has been added, based on current batch data. Heavy metals: method C has been replaced by method F, in line with the general policy for heavy metals tests. Sulfated ash: in view of the highly specific tests introduced into the monograph, this test has become redundant and has therefore been deleted.

08/2010:0333

HEPARIN SODIUM

Heparinum natricum

PA/PH/Exp. 6/T (09) 42 PUB

Bilaga 1

DEFINITION Preparation containing the sodium salt of a sulfated glycosaminoglycan present in mammalian tissues. It is prepared either from the lungs of cattle or from the intestinal mucosae of pigs, cattle or sheep. On complete hydrolysis, it liberates D-glucosamine, D-glucuronic acid, L-iduronic acid, acetic acid and sulfuric acid. It has the property of delaying the clotting of blood. Potency: minimum 180 IU/mg (dried substance). PRODUCTION The animals from which heparin sodium is derived must fulfil the requirements for the health of animals suitable for human consumption. All stages of production and sourcing are subjected to a suitable quality management system. The identity of the source species and the absence of material from the other species is verified by appropriate testing during production. It is produced by methods of manufacturing designed to minimise or eliminate substances lowering blood pressure. CHARACTERS Appearance: white or almost white, hygroscopic powder. Solubility: freely soluble in water. IDENTIFICATION A. It delays the clotting of recalcified citrated sheep plasma (see Assay). B. Nuclear magnetic resonance spectrometry (2.2.33). Solution A. A solution in deuterium oxide Rcontaining 20 Îg/mL of deuterated sodium trimethylsilylpropionate R and if the signal at 5.22 ppm is smaller than 80 per cent of the signal at 5.44 ppm, 12 Îg/mL of sodium edetate R. Preparation: dissolve 20 mg of the substance to be examined in 0.7 mL of solution A. Comparison: dissolve 20 mg of heparin sodium for NMR identification CRSin 0.7 mL of solution A. If stored, the sodium edetate and deuterated sodium trimethylsilylpropionate solutions must be kept in high-density, natural polyethylene bottles. Apparatus: spectrometer operating at minimum 300 MHz. Acquisition of H-NMR spectra: — number of transients: minimum 16 ; it is adjusted until the signal-to-noise ratio is at least 1000:1 for the heparin methyl signal at 2.04 ppm ; — temperature: about 25 °C ; test sample and reference spectra have to be obtained at the same temperature ; — acquisition time: minimum 2 s ; — repetition time (acquisition time plus delay) : minimum 4 s ; — spectral width: 10-12 ppm, centred at around 4.5 ppm ; — pulse width: to give a flip angle between 30° and 90°.

PA/PH/Exp. 6/T (09) 42 PUB

Bilaga 1

Processing: — exponential line-broadening window function: 0.3 Hz ; — Fourier transformation ; — trimethylsilylpropionate reference signal set at 0.00 ppm. Results: — the large heparin sodium signals must be present : 2.04 ppm, 3.27 ppm (doublet), 4.34 ppm, 5.22 ppm and 5.42 ppm, all within ± 0.03 ppm ; — the H-NMR spectrum obtained with the test sample and that obtained with heparin sodium for NMR identification CRSare compared qualitatively after the 2 spectra have been normalised so as to have a similar intensity ; dermatan sulfate with a methyl signal at 2.08 ± 0.02 ppm may be observed ; no unidentified signals larger than 4 per cent compared to the height of the heparin signal at 5.42 ppm are present in the ranges 0.10-2.00 ppm, 2.10-3.10 ppm and 5.70-8.00 ppm ; signals from the solvent or process-related substances may be present and have to be identified to be accepted ; variations in the intensity of some signal regions of the spectrum of heparin may occur : the intensity-variable regions are between 3.35 ppm and 4.55 ppm, where the signal pattern is approximately kept but intensity varies. C. Liquid chromatography (2.2.29) as described in the test for related substances with the following modifications. Injection: test solution (a) and reference solution (c). Relative retention with reference to heparin (retention time = about 26 min) : dermatan sulfate and chondroitin sulfate = about 0.9 ; over-sulfated chondroitin sulfate = about 1.3. System suitability: reference solution (c) : — peak-to-valley ratio: minimum 1.3, where Hp = height above the baseline of the peak due to dermatan sulfate + chondroitin sulfate and Hv = height above the baseline of the lowest point of the curve separating this peak from the peak due to heparin. Results: the principal peak in the chromatogram obtained with test solution (a) is similar in retention time and shape to the principal peak in the chromatogram obtained with reference solution (c). D. Sodium (see Tests). TESTS Appearance of solution. The solution is clear (2.2.1) and not more intensely coloured than intensity 5 of the range of reference solutions of the most appropriate colour (2.2.2, Method II). Dissolve a quantity equivalent to 50 000 IU in water R and dilute to 10 mL with the same solvent. pH (2.2.3) : 5.5 to 8.0. Dissolve 0.1 g in carbon dioxide-free water R and dilute to 10 mL with the same solvent. Nucleotidic impurities. Dissolve 40 mg in 10 mL of water R. The absorbance (2.2.25) measured at 260 nm is not greater than 0.15.

PA/PH/Exp. 6/T (09) 42 PUB

Bilaga 1

Protein: maximum 0.5 per cent (dried substance). Solution A. Mix 2 volumes of a 10 g/L solution of sodium hydroxide R and 2 volumes of a 50 g/L solution of sodium carbonate Rand dilute to 5 volumes with water R. Solution B. Mix 2 volumes of a 12.5 g/L solution ofcopper sulfate R and 2 volumes of a 29.8 g/L solution of sodium tartrate R and dilute to 5 volumes withwater R. Solution C. Mix 1 volume of solution B and 50 volumes of solution A. Solution D. Dilute a phosphomolybdotungstic reagent(1) 2- to 4-fold in water R. Suitable dilutions produce solutions of pH 10.25 ± 0.25 after addition of solutions C and D to the test and reference solutions. Test solution. Dissolve the substance to be examined inwater R to obtain a concentration of 5 mg/mL. Reference solutions. Dissolve bovine albumin R inwater R to obtain a concentration of 100 mg/mL. Prepare dilutions of the solution in water R as prescribed in general chapter 2.5.33, method 2. Blank: water R. Procedure. To 1 mL of each reference solution, of the test solution and of the blank, add 5 mL of solution C. Allow to stand for 10 min. Add 0.5 mL of solution D, mix and allow to stand at room temperature for 30 min. Determine the absorbances (2.2.25) of the solutions at 750 nm, using the solution prepared from the blank as compensation liquid. Calculations. As prescribed in general chapter 2.5.33, method 2. Related substances. Liquid chromatography (2.2.29). Reference solutions are stable at room temperature for 24 h. Test solution (a). Dissolve an accurately weighed quantity of about 50 mg of the substance to be examined in 5.0 mL of water for chromatography R. Mix using a vortex mixer until dissolution is complete. Test solution (b). Dissolve an accurately weighed quantity of about 0.1 g of the substance to be examined in 1.0 mL of water for chromatography R. Mix using a vortex mixer until dissolution is complete. Mix 500ÎL of the solution and 250 ÎL of 1 M hydrochloric acid, then add 50 L of a 250 mg/mL solution of sodium nitrite R(2). Mix gently and allow to Î stand at room temperature for 40 min before adding 200 ÎL of 1 M sodium hydroxide to stop the reaction. Reference solution (a). Dissolve 250 mg of heparin for physico-chemical analysis CRS inwater for chromatography R and dilute to 2.0 mL with the same solvent. Mix using a vortex mixer until dissolution is complete. Reference solution (b). Add 1200 ÎL of reference solution (a) to 300 ÎL ofdermatan sulfate and over-sulfated chondroitin sulfate CRS. Mix using a vortex mixer to homogenise. Reference solution (c). Add 100 ÎL of reference solution (b) to 900 ÎL of water for chromatography R. Mix using a vortex mixer to homogenise.

(1) Folin-Ciocalteu’s phenol reagent from Merck (reference 1.09001.0500) is suitable. (2) Sodium nitrite, analytical reagent grade from Fischer scientific (batch 0886083) is suitable.

PA/PH/Exp. 6/T (09) 42 PUB

Bilaga 1

Reference solution (d). Add 400 ÎL of reference solution (a) to 100 ÎL of water for chromatography R and mix using a vortex mixer. Add 250 ÎL of 1 M hydrochloric acid, then add 50 ÎL of a 250 mg/mL solution of sodium nitrite R. Mix gently and allow to stand at room temperature for 40 min before adding 200 ÎL of 1 M sodium hydroxide to stop the reaction. Reference solution (e). To 500 ÎL of reference solution (b), add 250 ÎL of 1 M hydrochloric acid, then add 50 ÎL of a 250 mg/mL solution of sodium nitrite R. Mix gently and allow to stand at room temperature for 40 min before adding 200 ÎL of 1 M sodium hydroxide to stop the reaction. Precolumn: — size: l = 0.05 m, Ø = 2 mm ; — stationary phase: anion exchange resin R (13 Îm)(3). Column: — size: l = 0.25 m, Ø = 2 mm ; — stationary phase: anion exchange resin R (9 m)(4); Î — temperature: 40 °C. Mobile phase: — mobile phase A: dissolve 0.40 g ofsodium dihydrogen phosphate Rin 1 L of water for chromatography R and adjust to pH 3.0 with dilute phosphoric acid R; — mobile phase B: dissolve 0.40 g ofsodium dihydrogen phosphate R in 1 L ofwater for chromatography R, add 140 g of sodium perchlorate R(5) and adjust to pH 3.0 with dilute phosphoric acid R; filter and degas ;

Time Mobile phase A Mobile phase B (min) (per cent V/V) (per cent V/V)

0 - 10 75 25 10 - 35 75→ 0 25→ 100 35 - 40 0 100 Flow rate: 0.22 mL/min. Detection: spectrophotometer at 202 nm. Equilibration: at least 15 min. Injection: 20 ÎL of test solution (b) and reference solutions (d) and (e). Relative retention with reference to heparin (retention time = about 26 min) : dermatan sulfate and chondroitin sulfate = about 0.9 ; over-sulfated chondroitin sulfate = about 1.3. System suitability: — the chromatogram obtained with reference solution (d) shows no peak at the retention time of heparin ; — resolution: minimum 3.0 between the peaks due to dermatan sulfate + chondroitin sulfate and over-sulfated chondroitin sulfate in the chromatogram obtained with reference solution (e). Limits: (3) AG11-HC from Dionex (reference 052963) is suitable. (4) AS11-HC from Dionex (reference 052961) is suitable. (5) Normapur from VWR/Prolabo (reference 27988.232) is suitable.

PA/PH/Exp. 6/T (09) 42 PUB

Bilaga 1

— sum of dermatan sulfate and chondroitin sulfate: not more than the area of the corresponding peak in the chromatogram obtained with reference solution (e) (2.0 per cent) ; — any other impurity: no peaks other than the peak due to dermatan sulfate + chondroitin sulfate are detected. Nitrogen (2.5.9) : 1.5 per cent to 2.5 per cent (dried substance), determined on 0.100 g. Sodium: 9.5 per cent to 12.5 per cent (dried substance). Atomic absorption spectrometry (2.2.23, Method I). Test solution. Dissolve 50 mg of the substance to be examined in a 1.27 mg/mL solution ofcaesium chloride R in 0.1 M hydrochloric acid and dilute to 100.0 mL with the same solvent. Reference solutions. Prepare reference solutions containing 25 ppm, 50 ppm and 75 ppm of Na, using sodium standard solution (200 ppm Na) R diluted with a 1.27 mg/mL solution of caesium chloride Rin 0.1 M hydrochloric acid. Source: sodium hollow-cathode lamp. Wavelength: 330.3 nm. Atomisation device: flame of suitable composition (for example 11 L of air and 2 L of acetylene per minute). Heavy metals (2.4.8) : maximum 30 ppm. 1.0 g complies with test F. Prepare the reference solution using 3.0 mL oflead standard solution (10 ppm Pb) R. Loss on drying(2.2.32) : maximum 8.0 per cent, determined on 1.000 g by drying at 60 °C over diphosphorus pentoxide R at a pressure not exceeding 670 Pa for 3 h.

Bacterial endotoxins (2.6.14) : less than 0.01 IU per International Unit of heparin, if intended for use in the manufacture of parenteral preparations without a further appropriate procedure for the removal of bacterial endotoxins. ASSAY Carry out the assay of heparin (2.7.5). The estimated potency is not less than 90 per cent and not more than 111 per cent of the stated potency. The confidence limits of the estimated potency (P = 0.95) are not less than 80 per cent and not more than 125 per cent of the stated potency. STORAGE In an airtight container. If the substance is sterile, store in a sterile, airtight, tamper-proof container. LABELLING The label states : — the number of International Units per milligram ; — the animal species of origin ; — where applicable, that the substance is suitable for use in the manufacture of parenteral preparations.

PA/PH/Exp. 6/T (09) 42 PUB

Bilaga 1

Reagents

Deuterated sodium trimethylsilylpropionate. C6H9 H4NaO2Si. (Mr 172.3). XXXXXXX. [24493-21-8]. Sodium 3-(trimethylsilyl)(2,2,3,3- H4)propionate. TSP-d4. Degree of deuteration: minimum 98 per cent. White or almost white powder. The following chromatogram is shown for information but will not be published in the European Pharmacopoeia.

1. dermatan sulfate + chondroitin 2. heparin 3. over-sulfated chondroitin sulfate sulfate Figure 0333.-1. – Chromatogram for identification test C of heparin sodium : reference solution (c) (chromatogram obtained after subtraction of the blank)

PA/PH/Exp. 6/T (09) 42 PUB

Bilaga 1

The following chromatogram is shown for information but will not be published in the European Pharmacopoeia.

1. dermatan sulfate + chondroitin sulfate 2. over-sulfated chondroitin sulfate Figure 0333.-2. –Chromatogram for the test for related substances of heparin sodium : reference solution (e) (chromatogram obtained after subtraction of the blank)

PA/PH/Exp. 6/T (09) 43 PUB

Bilaga 2

NOTE ON THE MONOGRAPH

Production: the tests for nuclear magnetic resonance spectrometry (NMR) and capillary

Identification: the tests for specific optical rotation and zone electrophoresis have been replaced by the highly specific H-NMR and strong anion-exchange liquid chromatography (SAX-HPLC) tests ; H-NMR has been selected for its ability not only to allow identification of heparin, but also to alert users to possible contaminations. Nucleotidic impurities: the limit has been tightened, based on current batch data. Protein: the Lowry test method has been introduced to replace the absorbance test.

Related substances: a SAX-HPLC-based test has been introduced, allowing the differentiation of natural contaminants linked to the production process (such as dermatan sulfate and chondroitin sulfate) from chemically synthesised contaminants ; a limit for the sum of dermatan sulfate and chondroitin sulfate, which co-elute in this method, is proposed, further to consideration of current batch data.

Nitrogen: a lower limit has been added, based on current batch data. Heavy metals: method C has been replaced by method F, in line with the general policy for heavy metals tests. Sulfated ash: in view of the highly specific tests introduced into the monograph, this test has become redundant and has therefore been deleted.

08/2010:0332

HEPARIN CALCIUM

Heparinum calcicum

PA/PH/Exp. 6/T (09) 43 PUB

Bilaga 2

DEFINITION Preparation containing the calcium salt of a sulfated glycosaminoglycan present in mammalian tissues. It is prepared either from the lungs of cattle or from the intestinal mucosae of pigs, cattle or sheep. On complete hydrolysis, it liberates D-glucosamine, D-glucuronic acid, L-iduronic acid, acetic acid and sulfuric acid. It has the property of delaying the clotting of blood. Potency: minimum 180 IU/mg (dried substance). PRODUCTION The animals from which heparin calcium is derived must fulfil the requirements for the health of animals suitable for human consumption. All stages of production and sourcing are subjected to a suitable quality management system. The identity of the source species and the absence of material from the other species is verified by appropriate testing during production. It is produced by methods of manufacturing designed to minimise or eliminate substances lowering blood pressure. CHARACTERS Appearance: white or almost white, hygroscopic powder. Solubility: freely soluble in water. IDENTIFICATION A. It delays the clotting of recalcified citrated sheep plasma (see Assay).

B. Nuclear magnetic resonance spectrometry (2.2.33). Preparation: dissolve 20 mg of the substance to be examined in 0.7 mL of a 20 Îg/mL solution of deuterated sodium trimethylsilylpropionate R indeuterium oxide R. Comparison: dissolve 20 mg ofheparin calcium for NMR identification CRS in 0.7 mL of a 20 Îg/mL solution of deuterated sodium trimethylsilylpropionate R in deuterium oxide R. Apparatus: spectrometer operating at minimum 300 MHz.

Acquisition of 1

H-NMR spectra: — number of transients: minimum 16 ; it is adjusted until the signal-to-noise ratio is at least 1000:1 for the heparin methyl signal at 2.04 ppm ; — temperature: about 25 °C ; test sample and reference spectra have to be obtained at the same temperature ; — acquisition time: minimum 2 s ; — repetition time (acquisition time plus delay) : minimum 4 s ; — spectral width: 10-12 ppm, centred at around 4.5 ppm ; — pulse width: to give a flip angle between 30° and 90°.

PA/PH/Exp. 6/T (09) 43 PUB

Bilaga 2

Processing: — exponential line-broadening window function: 0.3 Hz ; — Fourier transformation ; — trimethylsilylpropionate reference signal set at 0.00 ppm. Results: — the large heparin calcium signals must be present : 2.05 ppm, 3.29 ppm (doublet), 4.37 ppm, 5.35 ppm and 5.43 ppm, all within ± 0.03 ppm ; 1 heparin — the H-NMR spectrum obtained with the test sample and that obtained with calcium for NMR identification CRS are compared qualitatively after the 2 spectra have been normalised so as to have a similar intensity ; dermatan sulfate with a methyl signal at 2.08 ± 0.02 ppm may be observed ; no unidentified signals larger than 4 per cent compared to the height of the heparin signal at 5.43 ppm are present in the ranges 0.10-2.00 ppm, 2.10-3.10 ppm and 5.70-8.00 ppm ; signals from the solvent or process-related substances may be present and have to be identified to be accepted. C. Liquid chromatography (2.2.29) as described in the test for related substances with the following modifications. Injection: test solution (a) and reference solution (c). Relative retention with reference to heparin (retention time = about 26 min) : dermatan sulfate and chondroitin sulfate = about 0.9 ; over-sulfated chondroitin sulfate = about 1.3. System suitability: reference solution (c) : — peak-to-valley ratio: minimum 1.3, where Hp = height above the baseline of the peak due to dermatan sulfate + chondroitin sulfate and Hv = height above the baseline of the lowest point of the curve separating this peak from the peak due to heparin. Results: the principal peak in the chromatogram obtained with test solution (a) is similar in retention time and shape to the principal peak in the chromatogram obtained with reference solution (c). D. It gives the reactions of calcium (2.3.1). TESTS Appearance of solution. The solution is clear (2.2.1) and not more intensely coloured than intensity 5 of the range of reference solutions of the most appropriate colour (2.2.2, Method II). Dissolve a quantity equivalent to 50 000 IU in water R and dilute to 10 mL with the same solvent. pH (2.2.3) : 5.5 to 8.0. Dissolve 0.1 g in carbon dioxide-free water R and dilute to 10 mL with the same solvent. Nucleotidic impurities. Dissolve 40 mg in 10 mL of water R. The absorbance (2.2.25) measured at 260 nm is not greater than 0.15. Protein: maximum 0.5 per cent (dried substance). Solution A. Mix 2 volumes of a 10 g/L solution of sodium hydroxide R and 2 volumes of a 50 g/L solution of sodium carbonate Rand dilute to 5 volumes with water R.

PA/PH/Exp. 6/T (09) 43 PUB

Bilaga 2

Solution B. Mix 2 volumes of a 12.5 g/L solution ofcopper sulfate R and 2 volumes of a 29.8 g/L solution of sodium tartrate R and dilute to 5 volumes withwater R. Solution C. Mix 1 volume of solution B and 50 volumes of solution A. Solution D. Dilute a phosphomolybdotungstic reagent(1) 2- to 4-fold in water R. Suitable dilutions produce solutions of pH 10.25 ± 0.25 after addition of solutions C and D to the test and reference solutions. Test solution. Dissolve the substance to be examined inwater R to obtain a concentration of 5 mg/mL. Reference solutions. Dissolve bovine albumin R inwater R to obtain a concentration of 100 mg/mL. Prepare dilutions of the solution in water R as prescribed in general chapter 2.5.33, method 2. Blank: water R. Procedure. To 1 mL of each reference solution, of the test solution and of the blank, add 5 mL of solution C. Allow to stand for 10 min. Add 0.5 mL of solution D, mix and allow to stand at room temperature for 30 min. Determine the absorbances (2.2.25) of the solutions at 750 nm, using the solution prepared from the blank as compensation liquid. Calculations. As prescribed in general chapter 2.5.33, method 2. Related substances. Liquid chromatography (2.2.29). Reference solutions are stable at room temperature for 24 h. Test solution (a). Dissolve an accurately weighed quantity of about 50 mg of the substance to be examined in 5.0 mL of water for chromatography R. Mix using a vortex mixer until dissolution is complete. Test solution (b). Dissolve an accurately weighed quantity of about 0.1 g of the substance to be examined in 1.0 mL of water for chromatography R. Mix using a vortex mixer until dissolution is complete. Mix 500ÎL of the solution and 250 ÎL of 1 M hydrochloric acid, then add 50 ÎL of a 250 mg/mL solution of sodium nitrite R(2). Mix gently and allow to stand at room temperature for 40 min before adding 200 ÎL of 1 M sodium hydroxide to stop the reaction. Reference solution (a). Dissolve 250 mg of heparin for physico-chemical analysis CRS inwater for chromatography R and dilute to 2.0 mL with the same solvent. Mix using a vortex mixer until dissolution is complete. Reference solution (b). Add 1200 ÎL of reference solution (a) to 300 ÎL ofdermatan sulfate and over-sulfated chondroitin sulfate CRS. Mix using a vortex mixer to homogenise. Reference solution (c). Add 100 ÎL of reference solution (b) to 900 ÎL of water for chromatography R. Mix using a vortex mixer to homogenise. Reference solution (d). Add 400 ÎL of reference solution (a) to 100 ÎL of water for chromatography R and mix using a vortex mixer. Add 250 ÎL of 1 M hydrochloric acid, then add 50 ÎL of a 250 mg/mL solution of sodium nitrite R. Mix gently and allow to stand at room temperature for 40 min before adding 200 ÎL of 1 M sodium hydroxide to stop the reaction.

(1) Folin-Ciocalteu’s phenol reagent from Merck (reference 1.09001.0500) is suitable. (2) Sodium nitrite, analytical reagent grade from Fischer scientific (batch 0886083) is suitable.

PA/PH/Exp. 6/T (09) 43 PUB

Bilaga 2

Reference solution (e). To 500 ÎL of reference solution (b), add 250 ÎL of 1 M hydrochloric acid, then add 50 ÎL of a 250 mg/mL solution of sodium nitrite R. Mix gently and allow to stand at room temperature for 40 min before adding 200 ÎL of 1 M sodium hydroxide to stop the reaction. Precolumn: — size: l = 0.05 m, Ø = 2 mm ; — stationary phase: anion exchange resin R (13 m)(3). Î Column: — size: l = 0.25 m, Ø = 2 mm ; — stationary phase: anion exchange resin R (9 m)(4); Î — temperature: 40 °C. Mobile phase: — mobile phase A: dissolve 0.40 g ofsodium dihydrogen phosphate Rin 1 L of water for chromatography R and adjust to pH 3.0 with dilute phosphoric acid R; — mobile phase B: dissolve 0.40 g ofsodium dihydrogen phosphate R in 1 L ofwater for chromatography R, add 140 g of sodium perchlorate R(5) and adjust to pH 3.0 with dilute phosphoric acid R; filter and degas ;

Time Mobile phase A Mobile phase B (min) (per cent V/V) (per cent V/V)

0 - 10 75 25 10 - 35 75→ 0 25→ 100 35 - 40 0 100 Flow rate: 0.22 mL/min. Detection: spectrophotometer at 202 nm. Equilibration: at least 15 min. Injection: 20 ÎL of test solution (b) and reference solutions (d) and (e). Relative retention with reference to heparin (retention time = about 26 min) : dermatan sulfate and chondroitin sulfate = about 0.9 ; over-sulfated chondroitin sulfate = about 1.3. System suitability: — the chromatogram obtained with reference solution (d) shows no peak at the retention time of heparin ; — resolution: minimum 3.0 between the peaks due to dermatan sulfate + chondroitin sulfate and over-sulfated chondroitin sulfate in the chromatogram obtained with reference solution (e). Limits: — sum of dermatan sulfate and chondroitin sulfate: not more than the area of the corresponding peak in the chromatogram obtained with reference solution (e) (2.0 per cent) ; — any other impurity: no peaks other than the peak due to dermatan sulfate + chondroitin sulfate are detected. (3) AG11-HC from Dionex (reference 052963) is suitable. (4) AS11-HC from Dionex (reference 052961) is suitable. (5) Normapur from VWR/Prolabo (reference 27988.232) is suitable.

PA/PH/Exp. 6/T (09) 43 PUB

Bilaga 2

Nitrogen (2.5.9) : 1.5 per cent to 2.5 per cent (dried substance), determined on 0.100 g. Calcium: 9.5 per cent to 11.5 per cent (dried substance), determined on 0.200 g by complexometric titration (2.5.11). Heavy metals (2.4.8) : maximum 30 ppm. 1.0 g complies with test F. Prepare the reference solution using 3.0 mL oflead standard solution (10 ppm Pb) R. Loss on drying(2.2.32) : maximum 8.0 per cent, determined on 1.000 g by drying at 60 °C over diphosphorus pentoxide R at a pressure not exceeding 670 Pa for 3 h. Bacterial endotoxins (2.6.14) : less than 0.01 IU per International Unit of heparin, if intended for use in the manufacture of parenteral preparations without a further appropriate procedure for the removal of bacterial endotoxins. The addition of divalent cations may be necessary in order to fulfil the validation criteria.

ASSAY Carry out the assay of heparin (2.7.5). The estimated potency is not less than 90 per cent and not more than 111 per cent of the stated potency. The confidence limits of the estimated potency (P = 0.95) are not less than 80 per cent and not more than 125 per cent of the stated potency.

STORAGE In an airtight container. If the substance is sterile, store in a sterile, airtight, tamper-proof container.

LABELLING The label states : — the number of International Units per milligram ; — the animal species of origin ; — where applicable, that the substance is suitable for use in the manufacture of parenteral preparations.

Reagents

PA/PH/Exp. 6/T (09) 43 PUB

Bilaga 2

The following chromatogram is shown for information but will not be published in the European Pharmacopoeia.

1. dermatan sulfate + chondroitin 2. heparin 3. over-sulfated chondroitin sulfate sulfate Figure 0332.-1.– Chromatogram for identification test C of heparin calcium : reference solution (c) (chromatogram obtained after subtraction of the blank)

PA/PH/Exp. 6/T (09) 43 PUB

Bilaga 2

The following chromatogram is shown for information but will not be published in the European Pharmacopoeia.

1. dermatan sulfate + chondroitin sulfate 2. over-sulfated chondroitin sulfate Figure 0332.-2.–Chromatogram for the test for related substances of heparin calcium : reference solution (e) (chromatogram obtained after subtraction of the blank)

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