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 613
    Pack size 25 mg
    Substance name 2-bromobenzyldimethylamine hydrochloride
    CAS Number Not applicable
    Quantitative No
    Current batch 2420
    QTY (Max 25)

  • Search result 2

    Category Number 477
    Pack size 25 mg
    Substance name 2-carbamoyl-1-methyl-3-[2-(5-methylimidazol-4-ylmethylthio)ethyl]guanidine dihydrochloride
    CAS Number 52568-80-6
    Quantitative No
    Current batch 3332
    QTY (Max 25)

  • Search result 3

    Category Number 559
    Pack size 25 mg
    Substance name 2-chlorothioxanthone
    CAS Number 86-39-5
    Quantitative No
    Current batch 1846
    QTY (Max 25)

  • Search result 4

    Category Number 79
    Pack size 25 mg
    Substance name 2-chlorotritanol
    CAS Number 66774-02-5
    Quantitative No
    Current batch 4333
    QTY (Max 25)

  • Search result 5

    Category Number 478
    Pack size 25 mg
    Substance name 2-cyano-1-methyl-3-[2-(5-methylimidazol-4-ylmethylsulfinyl)ethyl]guanidine
    CAS Number 54237-72-8
    Quantitative No
    Current batch 4034
    QTY (Max 25)

  • Search result 6

    Category Number 361
    Pack size 25 mg
    Substance name 2-diethylaminoethyl-3-(1-naphthyl)-2-(1-naphthylmethyl)propionate oxalate
    CAS Number 115025-99-5
    Quantitative No
    Current batch 4180
    QTY (Max 5)

  • Search result 7

    Category Number 244
    Pack size 50 mg
    Substance name 2-methyl-5-nitroimidazole
    CAS Number 696-23-1
    Quantitative No
    Current batch 2809
    QTY (Max 25)

  • Search result 8

    Category Number 457
    Pack size 50 mg
    Substance name 2-methyl-6-methylaminoheptan-2-ol
    CAS Number 4436-89-9
    Quantitative No
    Current batch 1648
    QTY (Max 25)

  • Search result 9

    Category Number 192
    Pack size 25 mg
    Substance name 2-tert-butylamino-1-(4-hydroxy-3-methylphenyl)ethanol
    CAS Number "2-tert-butylamino-1-(4-hydroxy-3-methylphenyl)ethanol" - CAS No. 18910-64-10 / "2-tert-butylamino-1-(4-hydroxy-3-methylphenyl)ethanol sulfate" - CAS No. 2044704-57-4
    Quantitative No
    Current batch 3891
    QTY (Max 25)

  • Search result 10

    Category Number 332
    Pack size 25 mg
    Substance name 2-thymoxyethyldimethylamine hydrochloride
    CAS Number 60439-42-1
    Quantitative No
    Current batch 1778
    QTY (Max 25)