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 141
    Pack size 200 mg
    Substance name ergotamine tartrate
    CAS Number 379-79-3
    Quantitative Yes
    Current batch 3892
    Discontinued
  • Search result 2

    Category Number 781
    Pack size 100 mg
    Substance name erythromycin
    CAS Number 114-07-8
    Quantitative Yes
    Current batch 4800
    QTY (Max 25)
  • Search result 3

    Category Number 794
    Pack size 250 mg
    Substance name erythromycin A
    CAS Number 114-07-8
    Quantitative Yes
    Current batch 2879
    Discontinued
  • Search result 4

    Category Number 795
    Pack size 50 mg
    Substance name erythromycin B
    CAS Number 527-75-3
    Quantitative Yes
    Current batch 2880
    Discontinued
  • Search result 5

    Category Number 796
    Pack size 50 mg
    Substance name erythromycin C
    CAS Number 1675-02-1
    Quantitative Yes
    Current batch 2881
    Discontinued
  • Search result 6

    Category Number 790
    Pack size 100 mg
    Substance name erythromycin estolate
    CAS Number 3521-62-8
    Quantitative No
    Current batch 2860
    QTY (Max 25)
  • Search result 7

    Category Number 798
    Pack size 50 mg
    Substance name erythromycin ethyl succinate
    CAS Number 1264-62-6
    Quantitative No
    Current batch 2842
    QTY (Max 25)
  • Search result 8

    Category Number 488
    Pack size 100 mg
    Substance name erythromycin stearate
    CAS Number 643-22-1
    Quantitative Yes
    Current batch 4421
    QTY (Max 25)
  • Search result 9

    Category Number 396
    Pack size 50 mg
    Substance name estradiol benzoate
    CAS Number 50-50-0
    Quantitative Yes
    Current batch 2370
    QTY (Max 25)
  • Search result 10

    Category Number 729
    Pack size 100 mg
    Substance name estradiol hemihydrate
    CAS Number 35380-71-3
    Quantitative Yes
    Current batch 3408
    QTY (Max 1)