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 497
    Pack size 100 mg
    Substance name prilocaine hydrochloride
    CAS Number 1786-81-8
    Quantitative Yes
    Current batch 4843
    QTY (Max 25)
  • Search result 2

    Category Number 293
    Pack size 100 mg
    Substance name primidone
    CAS Number 125-33-7
    Quantitative Yes
    Current batch 1562
    QTY (Max 1)
  • Search result 3

    Category Number 295
    Pack size 100 mg
    Substance name procaine benzylpenicillin
    CAS Number 54-35-3
    Quantitative Yes
    Current batch 4155
    QTY (Max 25)
  • Search result 4

    Category Number 638
    Pack size 100 mg
    Substance name prochlorperazine maleate
    CAS Number 84-02-6
    Quantitative Yes
    Current batch 4068
    QTY (Max 25)
  • Search result 5

    Category Number 493
    Pack size 100 mg
    Substance name prochlorperazine mesilate
    CAS Number 5132-55-8
    Quantitative Yes
    Current batch 4816
    QTY (Max 25)
  • Search result 6

    Category Number 494
    Pack size 25 mg
    Substance name prochlorperazine sulfoxide
    CAS Number 10078-27-0
    Quantitative No
    Current batch 1768
    QTY (Max 2)
  • Search result 7

    Category Number 296
    Pack size 100 mg
    Substance name procyclidine hydrochloride
    CAS Number 1508-76-5
    Quantitative Yes
    Current batch 4565
    QTY (Max 25)
  • Search result 8

    Category Number 449
    Pack size 50 mg
    Substance name progesterone
    CAS Number 57-83-0
    Quantitative Yes
    Current batch 4181
    QTY (Max 25)
  • Search result 9

    Category Number 297
    Pack size 100 mg
    Substance name proguanil hydrochloride
    CAS Number 637-32-1
    Quantitative Yes
    Current batch 3164
    QTY (Max 25)
  • Search result 10

    Category Number 412
    Pack size 100 mg
    Substance name promethazine hydrochloride
    CAS Number 58-33-3
    Quantitative Yes
    Current batch 4460
    QTY (Max 25)