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 221
    Pack size 100 mg
    Substance name medroxyprogesterone acetate
    CAS Number 71-58-9
    Quantitative Yes
    Current batch 4566
    QTY (Max 25)
  • Search result 2

    Category Number 222
    Pack size 25 mg
    Substance name megestrol
    CAS Number 3562-63-8
    Quantitative No
    Current batch 3748
    QTY (Max 25)
  • Search result 3

    Category Number 223
    Pack size 100 mg
    Substance name megestrol acetate
    CAS Number 595-33-5
    Quantitative Yes
    Current batch 3544
    QTY (Max 25)
  • Search result 4

    Category Number 1077
    Pack size 100 mg
    Substance name melatonin
    CAS Number 73-31-4
    Quantitative Yes
    Current batch 3994
    QTY (Max 25)
  • Search result 5

    Category Number 1333
    Pack size 15mg
    Substance name Melatonin Impurity 1
    CAS Number Not applicable
    Quantitative No
    Current batch 4912
    QTY (Max 25)
  • Search result 6

    Category Number 1151
    Pack size 25 mg
    Substance name melitracen hydrochloride
    CAS Number 10563-70-9
    Quantitative No
    Current batch 3760
    QTY (Max 25)
  • Search result 7

    Category Number 629
    Pack size 100 mg
    Substance name meloxicam
    CAS Number 71125-38-7
    Quantitative Yes
    Current batch 4198
    QTY (Max 25)
  • Search result 8

    Category Number 630
    Pack size 100 mg
    Substance name meloxicam impurity standard
    CAS Number 71125-38-7
    Quantitative No
    Current batch 4483
    QTY (Max 25)
  • Search result 9

    Category Number 391
    Pack size 100 mg
    Substance name melphalan
    CAS Number 148-82-3
    Quantitative Yes
    Current batch 3327
    QTY (Max 25)
  • Search result 10

    Category Number 699
    Pack size 100 mg
    Substance name mepivacaine hydrochloride
    CAS Number 1722-62-9
    Quantitative Yes
    Current batch 4202
    QTY (Max 25)