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 770
    Pack size 25 mg
    Substance name 4'-hydroxyacetophenone
    CAS Number 99-93-4
    Quantitative No
    Current batch 2796
    QTY (Max 25)

  • Search result 2

    Category Number 557
    Pack size 100 mg
    Substance name 4'-isobutylacetophenone
    CAS Number 38861-78-8
    Quantitative No
    Current batch 3042
    QTY (Max 5)

  • Search result 3

    Category Number 681
    Pack size 25 mg
    Substance name 4-acetyl-2-fluorobiphenyl
    CAS Number Not applicable
    Quantitative No
    Current batch 2249
    QTY (Max 25)

  • Search result 4

    Category Number 10
    Pack size 50 mg
    Substance name 4-amino-6-chlorobenzene-1,3-disulfonamide
    CAS Number 121-30-2
    Quantitative No
    Current batch 2149
    QTY (Max 25)

  • Search result 5

    Category Number 74
    Pack size 25 mg
    Substance name 4-chloro-5-sulfamoylanthranilic acid
    CAS Number 3086-91-7
    Quantitative No
    Current batch 3767
    QTY (Max 25)

  • Search result 6

    Category Number 604
    Pack size 1
    Substance name 4-chlorobenzylphthalazinone
    CAS Number Not applicable
    Quantitative Not applicable
    Current batch
    Discontinued

  • Search result 7

    Category Number 195
    Pack size 25 mg
    Substance name 4-dimethylamino-3-methyl-1,2-diphenylbutan-2-ol hydrochloride
    CAS Number 2214-28-0
    Quantitative No
    Current batch 2645
    QTY (Max 25)

  • Search result 8

    Category Number 1130
    Pack size 50 mg
    Substance name 4-dodecylresorcinol
    CAS Number 24305-56-4
    Quantitative No
    Current batch 3616
    Discontinued

  • Search result 9

    Category Number 71
    Pack size 25 mg
    Substance name 4-[2-(5-chloro-2-methoxybenzamido)ethyl]benzenesulfonamide
    CAS Number 16673-34-0
    Quantitative No
    Current batch 4161
    QTY (Max 25)

  • Search result 10

    Category Number 359
    Pack size 1
    Substance name 5-(6-methoxy-2-naphthyl)-3-methylcyclohexan-1-one
    CAS Number Not applicable
    Quantitative Not applicable
    Current batch
    Discontinued