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.

07 August 2025

We are pleased to update that products affected by the recent electrical freezer fault are now available following their temporary withdrawal.

This follows a detailed quality assessment of vialled stock and re-vialing product from our reserved bulk supplies.

Thank you again for your patience while we worked to resolve this matter.

11 items
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  • Search result 1

    Category Number 499
    Pack size 25 mg
    Declared content Not applicable
    Current batch 4183
    QTY (Max 25)
  • Search result 2

    Category Number 163
    Pack size 0.5 mL
    Substance name 4'-fluoro-4-chlorobutyrophenone
    Declared content Not applicable
    Current batch 829
    Discontinued
  • Search result 3

    Category Number 770
    Pack size 25 mg
    Substance name 4'-hydroxyacetophenone
    Declared content Not applicable
    Current batch 2796
    QTY (Max 25)
  • Search result 4

    Category Number 557
    Pack size 100 mg
    Substance name 4'-isobutylacetophenone
    Declared content Not applicable
    Current batch 3042
    QTY (Max 1)
  • Search result 5

    Category Number 681
    Pack size 25 mg
    Substance name 4-acetyl-2-fluorobiphenyl
    Declared content Not applicable
    Current batch 2249
    QTY (Max 25)
  • Search result 6

    Category Number 10
    Pack size 50 mg
    Substance name 4-amino-6-chlorobenzene-1,3-disulfonamide
    Declared content Not applicable
    Current batch 2149
    QTY (Max 25)
  • Search result 7

    Category Number 74
    Pack size 25 mg
    Substance name 4-chloro-5-sulfamoylanthranilic acid
    Declared content Not applicable
    Current batch 3767
    QTY (Max 25)
  • Search result 8

    Category Number 604
    Pack size 1
    Substance name 4-chlorobenzylphthalazinone
    Declared content Not applicable
    Current batch
    Discontinued
  • Search result 9

    Category Number 195
    Pack size 25 mg
    Declared content Not applicable
    Current batch 2645
    QTY (Max 25)
  • Search result 10

    Category Number 1130
    Pack size 50 mg
    Substance name 4-dodecylresorcinol
    Declared content Not applicable
    Current batch 3616
    Discontinued