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

955 items

  • Search result 1

    Category Number 1254
    Pack size 100 mg
    Substance name mycophenolate mofetil
    CAS Number 128794-94-5
    Quantitative Yes
    Current batch 4256
    QTY (Max 25)

  • Search result 2

    Category Number 1255
    Pack size 25 mg
    Substance name mycophenolate mofetil impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4306
    QTY (Max 25)

  • Search result 3

    Category Number 640
    Pack size 25 mg
    Substance name N,N'-bis(2,4-xylyl)formamidine
    CAS Number 16596-04-6
    Quantitative No
    Current batch 3463
    QTY (Max 25)

  • Search result 4

    Category Number 1104
    Pack size 25 mg
    Substance name N-(2-hydroxyethyl)isonicotinamide nitric ester
    CAS Number 65141-47-1
    Quantitative No
    Current batch 3507
    QTY (Max 25)

  • Search result 5

    Category Number 889
    Pack size 10 mg
    Substance name N-demethylerythromycin A
    CAS Number 992-62-1
    Quantitative No
    Current batch 3198
    Out of Stock

  • Search result 6

    Category Number 730
    Pack size 25 mg
    Substance name N-desalkylflurazepam
    CAS Number 2886-65-9
    Quantitative No
    Current batch 4209
    QTY (Max 25)

  • Search result 7

    Category Number 437
    Pack size 500 mg
    Substance name N-ethylglucamine hydrochloride
    CAS Number Not applicable
    Quantitative No
    Current batch 1510
    Discontinued

  • Search result 8

    Category Number 846
    Pack size 25 mg
    Substance name N-methyl-2-(pyridin-2-yl)-N-[2-(pyridine-2-yl)ethyl]ethanamine trihydrochloride
    CAS Number 2095467-43-7
    Quantitative No
    Current batch 4891
    QTY (Max 25)

  • Search result 9

    Category Number 641
    Pack size 30 mg
    Substance name N-methyl-N'-(2,4-xylyl)formamidine
    CAS Number 33089-74-6
    Quantitative No
    Current batch 3464
    Out of Stock

  • Search result 10

    Category Number 756
    Pack size 25 mg
    Substance name N-p-chlorobenzoyltyramine
    CAS Number 41859-57-8
    Quantitative No
    Current batch 2752
    QTY (Max 25)