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 245
    Pack size 25 mg
    Substance name (1-methyl-5-nitroimidazol-2-yl)methanol
    CAS Number 936-05-0
    Quantitative No
    Current batch 2688
    QTY (Max 1)

  • Search result 2

    Category Number 37
    Pack size 25 mg
    Substance name (1S,2R)-1-benzyl-3-dimethylamino-2-methyl-1-phenylpropyl acetate
    CAS Number 33318-28-4
    Quantitative No
    Current batch 2646
    QTY (Max 25)

  • Search result 3

    Category Number 1059
    Pack size 20 mg
    Substance name (2-amino-5-nitrophenyl)(2-chlorophenyl)methanone
    CAS Number 2011-66-7
    Quantitative No
    Current batch 3532
    QTY (Max 25)

  • Search result 4

    Category Number 531
    Pack size 25 mg
    Substance name (2-butylbenzofuran-3-yl)(4-hydroxy-3,5-diiodophenyl)methanone
    CAS Number 1951-26-4
    Quantitative No
    Current batch 3777
    QTY (Max 25)

  • Search result 5

    Category Number 888
    Pack size 25 mg
    Substance name (5RS)-3-(2-hydroxyphenyl)-5-phenylcyclohex-2-enone
    CAS Number 15156-56-6
    Quantitative No
    Current batch 3170
    QTY (Max 25)

  • Search result 6

    Category Number 602
    Pack size 25 mg
    Substance name (E)-4-amino-2-ethylidenebutyric acid hydrochloride
    CAS Number 1379403-11-8
    Quantitative No
    Current batch 1956
    Discontinued

  • Search result 7

    Category Number 441
    Pack size 25 mg
    Substance name 1,4-bis(4-chlorobenzhydryl)piperazine
    CAS Number 346451-15-8
    Quantitative No
    Current batch 4513
    QTY (Max 25)

  • Search result 8

    Category Number 456
    Pack size 50 mg
    Substance name 1,5-dimethylhexyl(methyl)amine
    CAS Number 503-00-4
    Quantitative No
    Current batch 1647
    QTY (Max 25)

  • Search result 9

    Category Number 721
    Pack size 25 mg
    Substance name 1-(2,5-dichlorophenyl)-5-isopropylbiguanide hydrochloride
    CAS Number Not applicable
    Quantitative No
    Current batch 2381
    QTY (Max 25)

  • Search result 10

    Category Number 232
    Pack size 25 mg
    Substance name 1-(2-methoxyphenyl)piperazine
    CAS Number Not applicable
    Quantitative No
    Current batch 1589
    E-mail to order:  bpcrs@mhra.gov.uk