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.

New customer rules in Egypt

New customs rules in Egypt means additional actions are required by purchasers of the BPCRS if your order is over the value of £1600 or the shipment weighs more than 50kg. Please refer to the Egypt shipments guidance to learn what steps you will need to take if your order meets this criteria.  

970 items
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  • Search result 1

    Category Number 525
    Pack size 200 mg
    Substance name clemastine fumarate
    CAS Number 14976-57-9
    Quantitative Yes
    Current batch 3457
    QTY (Max 25)
  • Search result 2

    Category Number 1220
    Pack size 100 mg
    Substance name clenbuterol hydrochloride
    CAS Number 21898-19-1
    Quantitative Yes
    Current batch 4065
    QTY (Max 25)
  • Search result 3

    Category Number 1231
    Pack size 25 mg
    Substance name clenbuterol impurity D
    CAS Number 99-92-3
    Quantitative No
    Current batch 4107
    QTY (Max 25)
  • Search result 4

    Category Number 419
    Pack size 100 mg
    Substance name clindamycin phosphate
    CAS Number 24729-96-2
    Quantitative Yes
    Current batch 4555
    QTY (Max 25)
  • Search result 5

    Category Number 84
    Pack size 200 mg
    Substance name clioquinol
    CAS Number 130-26-7
    Quantitative Yes
    Current batch 3107
    QTY (Max 25)
  • Search result 6

    Category Number 507
    Pack size 100 mg
    Substance name clobazam
    CAS Number 22316-47-8
    Quantitative Yes
    Current batch 4341
    QTY (Max 5)
  • Search result 7

    Category Number 522
    Pack size 25 mg
    Substance name clobetasol impurity A
    CAS Number 5534-13-4
    Quantitative No
    Current batch 2459
    Discontinued
  • Search result 8

    Category Number 1334
    Pack size 15mg
    Substance name Clobetasol Impurity C
    CAS Number Not applicable
    Quantitative No
    Current batch 4913
    QTY (Max 25)
  • Search result 9

    Category Number 521
    Pack size 100 mg
    Substance name clobetasol propionate
    CAS Number 25122-46-7
    Quantitative Yes
    Current batch 4336
    QTY (Max 10)
  • Search result 10

    Category Number 482
    Pack size 100 mg
    Substance name clobetasone butyrate
    CAS Number 25122-57-0
    Quantitative Yes
    Current batch 4563
    QTY (Max 25)