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 233
    Pack size 1
    CAS Number Not applicable
    Quantitative Not applicable
    Current batch
    Discontinued
  • Search result 2

    Category Number 409
    Pack size 50 mg
    Substance name methysergide maleate
    CAS Number 129-49-7
    Quantitative Yes
    Current batch 1478
    Discontinued
  • Search result 3

    Category Number 642
    Pack size 100 mg
    Substance name metipranolol
    CAS Number 22664-55-7
    Quantitative Yes
    Current batch 2201
    QTY (Max 25)
  • Search result 4

    Category Number 357
    Pack size 100 mg
    Substance name metoclopramide hydrochloride
    CAS Number 7232-21-5
    Quantitative Yes
    Current batch 3792
    QTY (Max 25)
  • Search result 5

    Category Number 540
    Pack size 100 mg
    Substance name metoprolol tartrate
    CAS Number 56392-17-7
    Quantitative Yes
    Current batch 3011
    QTY (Max 25)
  • Search result 6

    Category Number 603
    Pack size 150 mg
    Substance name metronidazole
    CAS Number 443-48-1
    Quantitative Yes
    Current batch 4707
    QTY (Max 25)
  • Search result 7

    Category Number 735
    Pack size 100 mg
    Substance name metronidazole benzoate
    CAS Number 13182-89-3
    Quantitative Yes
    Current batch 3059
    QTY (Max 25)
  • Search result 8

    Category Number 251
    Pack size 100 mg
    Substance name mexenone
    CAS Number 1641-17-4
    Quantitative No
    Current batch 935
    QTY (Max 25)
  • Search result 9

    Category Number 252
    Pack size 100 mg
    Substance name mianserin hydrochloride
    CAS Number 21535-47-7
    Quantitative Yes
    Current batch 3331
    QTY (Max 25)
  • Search result 10

    Category Number 884
    Pack size 25 mg
    Substance name miconazole impurity A
    CAS Number 24155-42-8
    Quantitative No
    Current batch 3138
    QTY (Max 25)