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 364
    Pack size 25 mg
    Substance name 2,2-dimethyl-5-(2,4-xylyloxy)valeric acid
    CAS Number Not applicable
    Quantitative No
    Current batch 2599
    E-mail to order:  bpcrs@mhra.gov.uk

  • Search result 2

    Category Number 122
    Pack size 50 mg
    Substance name 2,3-dihydro-6-phenylimidazo[2,1,b]-thiazole
    CAS Number 4335-28-8
    Quantitative No
    Current batch 4480
    QTY (Max 25)

  • Search result 3

    Category Number 526
    Pack size 100 mg
    Substance name 2-(2-hydroxyethyl)-1-methylpyrrolidine
    CAS Number 67004-64-2
    Quantitative No
    Current batch 4112
    QTY (Max 25)

  • Search result 4

    Category Number 77
    Pack size 25 mg
    Substance name 2-(6-chlorothymoxy)ethyldimethylamine hydrochloride
    CAS Number Not applicable
    Quantitative No
    Current batch
    Discontinued

  • Search result 5

    Category Number 194
    Pack size 25 mg
    Substance name 2-(6-hydroxythymoxy)ethyldimethylamine hydrochloride
    CAS Number 16809-53-3
    Quantitative No
    Current batch 2040
    QTY (Max 25)

  • Search result 6

    Category Number 46
    Pack size 25 mg
    Substance name 2-(biphenyl-4-yl)propionic acid
    CAS Number 6341-72-6
    Quantitative No
    Current batch 3069
    QTY (Max 25)

  • Search result 7

    Category Number 417
    Pack size 50 mg
    Substance name 2-amino-1-(4-nitrophenyl)propane-1,3-diol
    CAS Number 716-61-0
    Quantitative No
    Current batch 4163
    QTY (Max 25)

  • Search result 8

    Category Number 12
    Pack size 50 mg
    Substance name 2-amino-4,6-dichlorophenol hydrochloride
    CAS Number 5959-39-7
    Quantitative No
    Current batch 4794
    QTY (Max 25)

  • Search result 9

    Category Number 813
    Pack size 25 mg
    Substance name 2-amino-5-chloropyridine
    CAS Number 1072-98-6
    Quantitative No
    Current batch 4503
    QTY (Max 25)

  • Search result 10

    Category Number 24
    Pack size 50 mg
    Substance name 2-azahypoxanthine
    CAS Number 7151-03-3
    Quantitative No
    Current batch 3147
    QTY (Max 25)