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.

37 items
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  • Search result 1

    Category Number 139
    Pack size 100 mg
    Substance name econazole nitrate
    Declared content
    99.6% of C18H15Cl3N2O,HNO3
    Current batch 4208
    QTY (Max 25)
  • Search result 2

    Category Number 743
    Pack size 20 mg
    Substance name enalapril diketopiperazine
    Declared content Not applicable
    Current batch 4286
    QTY (Max 25)
  • Search result 3

    Category Number 741
    Pack size 100 mg
    Substance name enalapril maleate
    Declared content
    99.8% of C20H28N2O5,C4H4O4
    Current batch 2673
    QTY (Max 10)
  • Search result 4

    Category Number 742
    Pack size 20 mg
    Substance name enalaprilat
    Declared content Not applicable
    Current batch 3090
    QTY (Max 25)
  • Search result 5

    Category Number 1286
    Pack size 100 mg
    Substance name enrofloxacin
    Declared content
    99.2 % of C19H22FN3O3
    Current batch 4597
    QTY (Max 25)
  • Search result 6

    Category Number 387
    Pack size 100 mg
    Substance name ephedrine hydrochloride
    Declared content
    99.8% of C10H15NO,HCl
    Current batch 4284
    Out of Stock
  • Search result 7

    Category Number 992
    Pack size 100 mg
    Substance name epirubicin hydrochloride
    Declared content
    96.0% of C27H29NO11,HCl
    Current batch 3559
    QTY (Max 25)
  • Search result 8

    Category Number 788
    Pack size 500 mg
    Substance name ergocalciferol
    Declared content
    99.0 % of C28H44O
    Current batch 4439
    QTY (Max 25)
  • Search result 9

    Category Number 405
    Pack size 100 mg
    Substance name ergometrine maleate
    Declared content
    97.2 % of C19H23N3O2, C4H4O4
    Current batch 4545
    Out of Stock
  • Search result 10

    Category Number 141
    Pack size 200 mg
    Substance name ergotamine tartrate
    Declared content
    calculated by user
    Current batch 3892
    Discontinued