Reference Standards

British Pharmacopoeia Chemical reference substances (BPCRS)

These Primary standards are established using absolute methods and the declared content figures are determined without comparing to another substance. You should use BPCRS to perform the tests in the British Pharmacopoeia (BP) or BP (Veterinary). Do not eat BPCRS or feed them to animals – you should only use BPCRS for chemical analysis. They are not suitable for any other use.

The BPCRS Catalogue is now available for download in Excel format, updated monthly to reflect the latest listings.

Search within this catalogue

955 items

  • Search result 1

    Category Number 11
    Pack size 20 mg
    Substance name 7-aminodesacetoxycephalosporanic acid
    CAS Number 22252-43-3
    Quantitative No
    Current batch 3109
    QTY (Max 25)

  • Search result 2

    Category Number 470
    Pack size 25 mg
    Substance name 7-chloro-1-5-dihydro-5-phenyl-1,5-benzodiazepine-2,4(3H)-dione
    CAS Number 22316-55-8
    Quantitative No
    Current batch 1588
    Discontinued

  • Search result 3

    Category Number 626
    Pack size 25 mg
    Substance name 8s-isopropyl-3β-hydroxytropanium bromide
    CAS Number Not applicable
    Quantitative No
    Current batch 4230
    QTY (Max 25)

  • Search result 4

    Category Number 560
    Pack size 25 mg
    Substance name 9-allyl-2-chlorothioxanthen-9-ol
    CAS Number 33049-88-6
    Quantitative No
    Current batch 1848
    QTY (Max 25)

  • Search result 5

    Category Number 2
    Pack size 25 mg
    Substance name <N1,N2>-diquinoxalin-2-ylsulphanilamide
    CAS Number Not applicable
    Quantitative No
    Current batch 1455
    Discontinued

  • Search result 6

    Category Number 1114
    Pack size 20 mg
    Substance name abacavir impurity 1
    CAS Number 120503-69-7
    Quantitative No
    Current batch 4748
    QTY (Max 25)

  • Search result 7

    Category Number 1113
    Pack size 10 mg
    Substance name abacavir impurity standard
    CAS Number 188062-50-2
    Quantitative No
    Current batch 3766
    QTY (Max 25)

  • Search result 8

    Category Number 1112
    Pack size 100 mg
    Substance name abacavir sulfate
    CAS Number 188062-50-2
    Quantitative Yes
    Current batch 3637
    QTY (Max 25)

  • Search result 9

    Category Number 1172
    Pack size 100 mg
    Substance name acamprosate calcium
    CAS Number 77337-73-6
    Quantitative Yes
    Current batch 3798
    QTY (Max 25)

  • Search result 10

    Category Number 1
    Pack size 50 mg
    Substance name acepromazine maleate
    CAS Number 3598-37-6
    Quantitative No
    Current batch 2608
    QTY (Max 2)

  • Search result 11

    Category Number 904
    Pack size 600 mg
    Substance name acetazolamide
    CAS Number 59-66-5
    Quantitative Yes
    Current batch 4345
    QTY (Max 25)

  • Search result 12

    Category Number 907
    Pack size 200 mg
    Substance name acetylcysteine
    CAS Number 616-91-1
    Quantitative Yes
    Current batch 4501
    QTY (Max 25)

  • Search result 13

    Category Number 438
    Pack size 100 mg
    Substance name aciclovir
    CAS Number 59277-89-3
    Quantitative Yes
    Current batch 4459
    QTY (Max 25)

  • Search result 14

    Category Number 827
    Pack size 100 mg
    Substance name acitretin
    CAS Number 55079-83-9
    Quantitative Yes
    Current batch 2923
    QTY (Max 25)

  • Search result 15

    Category Number 1120
    Pack size 100 mg
    Substance name adapalene
    CAS Number 106685-40-9
    Quantitative Yes
    Current batch 4632
    QTY (Max 25)

  • Search result 16

    Category Number 1121
    Pack size 10 mg
    Substance name adapalene impurity standard
    CAS Number 64044-51-5
    Quantitative No
    Current batch 4839
    QTY (Max 25)

  • Search result 17

    Category Number 3
    Pack size 100 mg
    Substance name adrenaline acid tartrate
    CAS Number 51-42-3
    Quantitative Yes
    Current batch 4582
    QTY (Max 25)

  • Search result 18

    Category Number 1251
    Pack size 25 mg
    Substance name adrenaline impurity standard
    CAS Number 51-42-3
    Quantitative No
    Current batch 4280
    QTY (Max 2)

  • Search result 19

    Category Number 763
    Pack size 100 mg
    Substance name albendazole
    CAS Number 54965-21-8
    Quantitative Yes
    Current batch 4094
    QTY (Max 25)

  • Search result 20

    Category Number 436
    Pack size 1 g
    Substance name alexandrian senna fruit powder
    CAS Number Not applicable
    Quantitative Yes
    Current batch 4814
    QTY (Max 1)

  • Search result 21

    Category Number 6
    Pack size 100 mg
    Substance name alfadolone acetate
    CAS Number 23930-37-2
    Quantitative Yes
    Current batch 2510
    QTY (Max 25)

  • Search result 22

    Category Number 7
    Pack size 100 mg
    Substance name alfaxalone
    CAS Number 23930-19-0
    Quantitative Yes
    Current batch 2191
    Discontinued

  • Search result 23

    Category Number 825
    Pack size 100 mg
    Substance name alfuzosin hydrochloride
    CAS Number 81403-68-1
    Quantitative Yes
    Current batch 2994
    QTY (Max 25)

  • Search result 24

    Category Number 847
    Pack size 25 mg
    Substance name alfuzosin impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 3359
    QTY (Max 25)

  • Search result 25

    Category Number 415
    Pack size 100 mg
    Substance name alimemazine tartrate
    CAS Number 4330-99-8
    Quantitative Yes
    Current batch 4752
    QTY (Max 25)

  • Search result 26

    Category Number 870
    Pack size 200 mg
    Substance name allopurinol
    CAS Number 315-30-0
    Quantitative Yes
    Current batch 3098
    QTY (Max 25)

  • Search result 27

    Category Number 831
    Pack size 20 mg
    Substance name allopurinol impurity A
    CAS Number 27511-79-1
    Quantitative No
    Current batch 4747
    QTY (Max 10)

  • Search result 28

    Category Number 832
    Pack size 10 mg
    Substance name allopurinol impurity B
    CAS Number 22407-20-1
    Quantitative No
    Current batch 2948
    QTY (Max 25)

  • Search result 29

    Category Number 843
    Pack size 10 mg
    Substance name allopurinol impurity C
    CAS Number 1346604-13-4
    Quantitative No
    Current batch 3179
    QTY (Max 25)

  • Search result 30

    Category Number 844
    Pack size 10 mg
    Substance name allopurinol impurity D
    CAS Number 6994-25-8
    Quantitative No
    Current batch 3180
    QTY (Max 25)

  • Search result 31

    Category Number 845
    Pack size 20 mg
    Substance name allopurinol impurity E
    CAS Number 31055-19-3
    Quantitative No
    Current batch 3181
    QTY (Max 25)

  • Search result 32

    Category Number 725
    Pack size 100 mg
    Substance name alverine citrate
    CAS Number 5560-59-8
    Quantitative Yes
    Current batch 4232
    QTY (Max 25)

  • Search result 33

    Category Number 724
    Pack size 1 mL
    Substance name alverine citrate impurity standard solution
    CAS Number 67-56-1
    Quantitative No
    Current batch 4162
    QTY (Max 25)

  • Search result 34

    Category Number 530
    Pack size 200 mg
    Substance name amantadine hydrochloride
    CAS Number 665-66-7
    Quantitative Yes
    Current batch 3965
    QTY (Max 25)

  • Search result 35

    Category Number 853
    Pack size 200 mg
    Substance name amikacin sulfate
    CAS Number 39831-55-5
    Quantitative Yes
    Current batch 4250
    QTY (Max 10)

  • Search result 36

    Category Number 8
    Pack size 100 mg
    Substance name amiloride hydrochloride
    CAS Number 17440-83-4
    Quantitative Yes
    Current batch 3411
    QTY (Max 25)

  • Search result 37

    Category Number 684
    Pack size 100 mg
    Substance name aminoglutethimide
    CAS Number 125-84-8
    Quantitative Yes
    Current batch 2375
    Discontinued

  • Search result 38

    Category Number 881
    Pack size 20 mg
    Substance name aminoglutethimide impurity A
    CAS Number Not applicable
    Quantitative No
    Current batch 3126
    Discontinued

  • Search result 39

    Category Number 956
    Pack size 10 mg
    Substance name aminoglutethimide impurity D
    CAS Number Not applicable
    Quantitative No
    Current batch 3365
    Discontinued

  • Search result 40

    Category Number 532
    Pack size 100 mg
    Substance name amiodarone hydrochloride
    CAS Number 19774-82-4
    Quantitative Yes
    Current batch 3407
    QTY (Max 25)

  • Search result 41

    Category Number 1090
    Pack size 100 mg
    Substance name amisulpride
    CAS Number 71675-85-9
    Quantitative Yes
    Current batch 3450
    QTY (Max 25)

  • Search result 42

    Category Number 1143
    Pack size 50 mg
    Substance name amisulpride for system suitability
    CAS Number 71675-85-9
    Quantitative No
    Current batch 3681
    QTY (Max 25)

  • Search result 43

    Category Number 15
    Pack size 200 mg
    Substance name amitraz
    CAS Number 33089-61-1
    Quantitative Yes
    Current batch 3050
    QTY (Max 25)

  • Search result 44

    Category Number 16
    Pack size 150 mg
    Substance name amitriptyline hydrochloride
    CAS Number 549-18-8
    Quantitative Yes
    Current batch 3974
    QTY (Max 25)

  • Search result 45

    Category Number 1221
    Pack size 100 mg
    Substance name amlodipine besilate
    CAS Number 111470-99-6
    Quantitative Yes
    Current batch 4054
    QTY (Max 25)

  • Search result 46

    Category Number 1222
    Pack size 25 mg
    Substance name amlodipine impurity 1
    CAS Number 496024-43-2
    Quantitative No
    Current batch 4075
    QTY (Max 2)

  • Search result 47

    Category Number 748
    Pack size 25 mg
    Substance name amoxicillin impurity standard
    CAS Number 61336-70-7
    Quantitative No
    Current batch 4153
    QTY (Max 25)

  • Search result 48

    Category Number 19
    Pack size 500 mg
    Substance name amoxicillin trihydrate
    CAS Number 61336-70-7
    Quantitative Yes
    Current batch 4595
    QTY (Max 5)

  • Search result 49

    Category Number 21
    Pack size 500 mg
    Substance name ampicillin trihydrate
    CAS Number 7177-48-2
    Quantitative No
    Current batch 4403
    QTY (Max 25)

  • Search result 50

    Category Number 22
    Pack size 1
    Substance name amprolium hydrochloride
    CAS Number 137-88-2
    Quantitative Not applicable
    Current batch
    Discontinued

  • Search result 51

    Category Number 1213
    Pack size 100 mg
    Substance name anastrozole
    CAS Number 120511-73-1
    Quantitative Yes
    Current batch 4048
    QTY (Max 25)

  • Search result 52

    Category Number 785
    Pack size 250 mg
    Substance name anhydrous ampicillin
    CAS Number 69-53-4
    Quantitative Yes
    Current batch 4143
    QTY (Max 25)

  • Search result 53

    Category Number 546
    Pack size 250 mg
    Substance name apramycin
    CAS Number 37321-09-8
    Quantitative Yes
    Current batch 4191
    QTY (Max 5)

  • Search result 54

    Category Number 1138
    Pack size 100 mg
    Substance name aprepitant
    CAS Number 170729-80-3
    Quantitative Yes
    Current batch 3582
    QTY (Max 25)

  • Search result 55

    Category Number 1148
    Pack size 25 mg
    Substance name aprepitant impurity standard
    CAS Number 170729-80-3
    Quantitative No
    Current batch 4122
    QTY (Max 25)

  • Search result 56

    Category Number 694
    Pack size 100 mg
    Substance name arginine hydrochloride
    CAS Number 1119-34-2
    Quantitative Yes
    Current batch 3938
    QTY (Max 25)

  • Search result 57

    Category Number 1318
    Pack size 100mg
    Substance name aripiprazole
    CAS Number 129722-12-9
    Quantitative Yes
    Current batch 4870
    QTY (Max 25)

  • Search result 58

    Category Number 1319
    Pack size 25mg
    Substance name aripiprazole impurity standard
    CAS Number 129722-12-9
    Quantitative No
    Current batch 4885
    QTY (Max 25)

  • Search result 59

    Category Number 461
    Pack size 100 mg
    Substance name ascorbic acid
    CAS Number 50-81-7
    Quantitative Yes
    Current batch 4409
    QTY (Max 25)

  • Search result 60

    Category Number 617
    Pack size 100 mg
    Substance name aspirin
    CAS Number 50-78-2
    Quantitative Yes
    Current batch 4440
    QTY (Max 25)

  • Search result 61

    Category Number 1164
    Pack size 25 mg
    Substance name aspirin impurity standard
    CAS Number 50-78-2
    Quantitative No
    Current batch 4776
    QTY (Max 25)

  • Search result 62

    Category Number 492
    Pack size 100 mg
    Substance name atenolol
    CAS Number 29122-68-7
    Quantitative Yes
    Current batch 4324
    QTY (Max 25)

  • Search result 63

    Category Number 370
    Pack size 50 mg
    Substance name atenolol impurity standard
    CAS Number 29122-68-7
    Quantitative No
    Current batch 4777
    QTY (Max 10)

  • Search result 64

    Category Number 1267
    Pack size 100mg
    Substance name atorvastatin calcium
    CAS Number 134523-03-8
    Quantitative Yes
    Current batch 4526
    QTY (Max 25)

  • Search result 65

    Category Number 1268
    Pack size 25 mg
    Substance name atorvastatin impurity
    CAS Number 344423-98-9
    Quantitative No
    Current batch 4515
    QTY (Max 25)

  • Search result 66

    Category Number 23
    Pack size 200 mg
    Substance name atropine sulfate
    CAS Number 5908-99-6
    Quantitative Yes
    Current batch 3980
    QTY (Max 25)

  • Search result 67

    Category Number 25
    Pack size 100 mg
    Substance name azaperone
    CAS Number 1649-18-9
    Quantitative Yes
    Current batch 1865
    QTY (Max 1)

  • Search result 68

    Category Number 534
    Pack size 100 mg
    Substance name azapropazone
    CAS Number 13539-59-8
    Quantitative Yes
    Current batch 1796
    QTY (Max 25)

  • Search result 69

    Category Number 515
    Pack size 10 mg
    Substance name azapropazone impurity A
    CAS Number 18091-57-1
    Quantitative No
    Current batch 1798
    Discontinued

  • Search result 70

    Category Number 516
    Pack size 10 mg
    Substance name azapropazone impurity B
    CAS Number Not applicable
    Quantitative No
    Current batch 1799
    QTY (Max 25)

  • Search result 71

    Category Number 517
    Pack size 10 mg
    Substance name azapropazone impurity C
    CAS Number Not applicable
    Quantitative No
    Current batch 1797
    Discontinued

  • Search result 72

    Category Number 527
    Pack size 50 mg
    Substance name azapropazone impurity standard
    CAS Number 13539-59-8
    Quantitative No
    Current batch 1812
    Discontinued

  • Search result 73

    Category Number 26
    Pack size 100 mg
    Substance name azathioprine
    CAS Number 446-86-6
    Quantitative Yes
    Current batch 3337
    QTY (Max 5)

  • Search result 74

    Category Number 519
    Pack size 1
    Substance name azlocillin sodium
    CAS Number Not applicable
    Quantitative Not applicable
    Current batch
    Discontinued

  • Search result 75

    Category Number 28
    Pack size 150 mg
    Substance name baclofen
    CAS Number 1134-47-0
    Quantitative Yes
    Current batch 3836
    QTY (Max 25)

  • Search result 76

    Category Number 30
    Pack size 100 mg
    Substance name beclometasone dipropionate
    CAS Number 9/8/5534
    Quantitative Yes
    Current batch 4400
    QTY (Max 25)

  • Search result 77

    Category Number 760
    Pack size 25 mg
    Substance name beclometasone17-propionate
    CAS Number 5534-18-9
    Quantitative No
    Current batch 4010
    QTY (Max 1)

  • Search result 78

    Category Number 761
    Pack size 25 mg
    Substance name beclometasone21-propionate
    CAS Number 69224-79-9
    Quantitative No
    Current batch 4573
    QTY (Max 25)

  • Search result 79

    Category Number 967
    Pack size 100 mg
    Substance name bendroflumethiazide
    CAS Number 73-48-3
    Quantitative Yes
    Current batch 3845
    QTY (Max 25)

  • Search result 80

    Category Number 432
    Pack size 1
    Substance name benethamine penicillin
    CAS Number 751-84-8
    Quantitative Not applicable
    Current batch
    Discontinued