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.

07 August 2025

We are pleased to update that products affected by the recent electrical freezer fault are now available following their temporary withdrawal.

This follows a detailed quality assessment of vialled stock and re-vialing product from our reserved bulk supplies.

Thank you again for your patience while we worked to resolve this matter.

951 items
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  • Search result 1

    Category Number 1305
    Pack size 100mg
    Substance name clopidogrel hydrogen sulfate
    CAS Number Not applicable
    Quantitative Yes
    Current batch 4754
    QTY (Max 25)
  • Search result 2

    Category Number 628
    Pack size 200 mg
    Substance name cloprostenol sodium
    CAS Number 55028-72-3
    Quantitative Yes
    Current batch 4363
    QTY (Max 10)
  • Search result 3

    Category Number 379
    Pack size 100 mg
    Substance name clotrimazole
    CAS Number 23593-75-1
    Quantitative Yes
    Current batch 3493
    QTY (Max 10)
  • Search result 4

    Category Number 88
    Pack size 250 mg
    Substance name cloxacillin benzathine
    CAS Number 23736-58-5
    Quantitative Yes
    Current batch 4781
    QTY (Max 10)
  • Search result 5

    Category Number 89
    Pack size 125 mg
    Substance name cloxacillin sodium
    CAS Number 7081-44-9
    Quantitative Yes
    Current batch 4337
    QTY (Max 25)
  • Search result 6

    Category Number 905
    Pack size 100 mg
    Substance name clozapine
    CAS Number 5786-21-0
    Quantitative Yes
    Current batch 3264
    QTY (Max 25)
  • Search result 7

    Category Number 91
    Pack size 50 mg
    Substance name co-dergocrine mesilate
    CAS Number 8067-24-1
    Quantitative Yes
    Current batch 2365
    Discontinued
  • Search result 8

    Category Number 715
    Pack size 100 mg
    Substance name cocaine hydrochloride
    CAS Number 53-21-4
    Quantitative Yes
    Current batch 4741
    QTY (Max 5)
  • Search result 9

    Category Number 514
    Pack size 100 mg
    Substance name codeine hydrochloride
    CAS Number Not applicable
    Quantitative Yes
    Current batch 2605
    Discontinued
  • Search result 10

    Category Number 90
    Pack size 200 mg
    Substance name codeine phosphate
    CAS Number 41444-62-6
    Quantitative Yes
    Current batch 4368
    QTY (Max 25)
  • Search result 11

    Category Number 1150
    Pack size 100 mg
    Substance name colchicine
    CAS Number 64-86-8
    Quantitative Yes
    Current batch 4495
    QTY (Max 25)
  • Search result 12

    Category Number 787
    Pack size 500 mg
    Substance name colecalciferol
    CAS Number 67-97-0
    Quantitative Yes
    Current batch 4622
    QTY (Max 1)
  • Search result 13

    Category Number 614
    Pack size 50 mg
    Substance name colestipol hydrochloride
    CAS Number 37296-80-3
    Quantitative No
    Current batch 2091
    QTY (Max 25)
  • Search result 14

    Category Number 551
    Pack size 500 mg
    Substance name colestyramine
    CAS Number 11041-12-6
    Quantitative Yes
    Current batch 4789
    QTY (Max 1)
  • Search result 15

    Category Number 585
    Pack size 100 mg
    Substance name cortisone acetate
    CAS Number 50-04-4
    Quantitative Yes
    Current batch 2008
    QTY (Max 1)
  • Search result 16

    Category Number 1145
    Pack size 25 mg
    Substance name coumarin
    CAS Number Not applicable
    Quantitative No
    Current batch 3660
    QTY (Max 25)
  • Search result 17

    Category Number 94
    Pack size 100 mg
    Substance name crotamiton
    CAS Number 483-63-6
    Quantitative Yes
    Current batch 4346
    QTY (Max 5)
  • Search result 18

    Category Number 466
    Pack size 150 mg
    Substance name cyanocobalamin
    CAS Number 68-19-9
    Quantitative Yes
    Current batch 4629
    QTY (Max 10)
  • Search result 19

    Category Number 96
    Pack size 100 mg
    Substance name cyclizine hydrochloride
    CAS Number 303-25-3
    Quantitative Yes
    Current batch 3678
    QTY (Max 25)
  • Search result 20

    Category Number 886
    Pack size 25 mg
    Substance name cyclobenzaprine hydrochloride
    CAS Number 6202-23-9
    Quantitative No
    Current batch 4466
    QTY (Max 25)
  • Search result 21

    Category Number 98
    Pack size 100 mg
    Substance name cyclopenthiazide
    CAS Number 742-20-1
    Quantitative No
    Current batch 3958
    QTY (Max 25)
  • Search result 22

    Category Number 380
    Pack size 100 mg
    Substance name cyclopentolate hydrochloride
    CAS Number 5870-29-1
    Quantitative Yes
    Current batch 3151
    QTY (Max 25)
  • Search result 23

    Category Number 1094
    Pack size 100 mg
    Substance name cyclophosphamide
    CAS Number 6055-19-2
    Quantitative Yes
    Current batch 3468
    QTY (Max 25)
  • Search result 24

    Category Number 688
    Pack size 100 mg
    Substance name cyproterone acetate
    CAS Number 427-51-0
    Quantitative Yes
    Current batch 3085
    QTY (Max 25)
  • Search result 25

    Category Number 383
    Pack size 100 mg
    Substance name cytarabine
    CAS Number 147-94-4
    Quantitative Yes
    Current batch 3986
    QTY (Max 25)