Reference Standards

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.

Search within this catalogue

951 items

  • Search result 1

    Category Number 145
    Pack size 100 mg
    Substance name ethopabate
    CAS Number 59-06-3
    Quantitative Yes
    Current batch 2611
    QTY (Max 25)

  • Search result 2

    Category Number 146
    Pack size 200 mg
    Substance name ethosuximide
    CAS Number 77-67-8
    Quantitative Yes
    Current batch 3456
    QTY (Max 25)

  • Search result 3

    Category Number 149
    Pack size 25 mg
    Substance name ethyl meclofenamate
    CAS Number Not applicable
    Quantitative No
    Current batch 1265
    Discontinued

  • Search result 4

    Category Number 150
    Pack size 1
    Substance name ethyldimethyl [2-(2-methylbenzhydryloxy)ethyl]ammonium chloride
    CAS Number Not applicable
    Quantitative Not applicable
    Current batch
    Discontinued

  • Search result 5

    Category Number 529
    Pack size 150 mg
    Substance name etodolac
    CAS Number 41340-25-4
    Quantitative Yes
    Current batch 4282
    QTY (Max 25)

  • Search result 6

    Category Number 541
    Pack size 10 mg
    Substance name etodolac 1-methyl analogue
    CAS Number 109518-50-5
    Quantitative No
    Current batch 4076
    QTY (Max 25)

  • Search result 7

    Category Number 542
    Pack size 10 mg
    Substance name etodolac 8-methyl analogue
    CAS Number 41340-19-6
    Quantitative No
    Current batch 3247
    QTY (Max 25)

  • Search result 8

    Category Number 533
    Pack size 10 mg
    Substance name etodolac acid dimer
    CAS Number Not applicable
    Quantitative No
    Current batch 3229
    Out of Stock

  • Search result 9

    Category Number 885
    Pack size 150 mg
    Substance name etoposide
    CAS Number 33419-42-0
    Quantitative Yes
    Current batch 4829
    QTY (Max 25)

  • Search result 10

    Category Number 1131
    Pack size 100 mg
    Substance name etynodiol diacetate
    CAS Number 297-76-7
    Quantitative Yes
    Current batch 4051
    E-mail to order:  bpcrs@mhra.gov.uk