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 601
    Pack size 25 mg
    Substance name 3-aminopent-4-ene-1,1-dicarboxylic acid
    CAS Number Not applicable
    Quantitative No
    Current batch 1955
    Discontinued

  • Search result 2

    Category Number 607
    Pack size 25 mg
    Substance name 3-dimethylaminopropyl 2-benzylaminobenzoate hydrochloride
    CAS Number 2196185-65-4
    Quantitative No
    Current batch 4313
    QTY (Max 25)

  • Search result 3

    Category Number 627
    Pack size 25 mg
    Substance name 3-formylrifamycin SV
    CAS Number 13292-22-3
    Quantitative No
    Current batch 4289
    QTY (Max 25)

  • Search result 4

    Category Number 239
    Pack size 50 mg
    Substance name 3-methyl-2,2-diphenyl-4-piperidino-butyronitrile
    CAS Number Not applicable
    Quantitative No
    Current batch 600
    E-mail to order:  bpcrs@mhra.gov.uk

  • Search result 5

    Category Number 569
    Pack size 25 mg
    Substance name 3-methylflavone-8-carboxylic acid
    CAS Number 3468-01-7
    Quantitative No
    Current batch 1978
    Discontinued

  • Search result 6

    Category Number 570
    Pack size 25 mg
    Substance name 3-methylflavone-8-carboxylic acid ethyl ester
    CAS Number 35888-94-9
    Quantitative No
    Current batch 1979
    Discontinued

  • Search result 7

    Category Number 367
    Pack size 0.1 mL
    Substance name 3-nitroso-3-azabicyclo[3.3.0]octane
    CAS Number Not applicable
    Quantitative No
    Current batch 2235
    Discontinued

  • Search result 8

    Category Number 450
    Pack size 50 mg
    Substance name 3-piperidylpropiophenone hydrochloride
    CAS Number 886-06-6
    Quantitative No
    Current batch 4481
    QTY (Max 25)

  • Search result 9

    Category Number 499
    Pack size 25 mg
    Substance name 4'-(2-isopropylaminoethyl)methanesulfonanilide hydrochloride
    CAS Number 16974-44-0
    Quantitative No
    Current batch 4183
    QTY (Max 25)

  • Search result 10

    Category Number 163
    Pack size 0.5 mL
    Substance name 4'-fluoro-4-chlorobutyrophenone
    CAS Number Not applicable
    Quantitative No
    Current batch 829
    Discontinued