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.

951 items
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  • Search result 1

    Category Number 370
    Pack size 50 mg
    Substance name atenolol impurity standard
    Declared content Not applicable
    Current batch 4777
    QTY (Max 10)
  • Search result 2

    Category Number 1267
    Pack size 100mg
    Substance name atorvastatin calcium
    Declared content
    95.1 % of C66H68CaF2N4O10
    Current batch 4526
    QTY (Max 25)
  • Search result 3

    Category Number 1268
    Pack size 25 mg
    Substance name atorvastatin impurity
    Declared content Not applicable
    Current batch 4515
    QTY (Max 25)
  • Search result 4

    Category Number 23
    Pack size 200 mg
    Substance name atropine sulfate
    Declared content
    96.2% of (C17H23NO3)2,H2SO4 Each mg of (C17H23NO3)2,H2SO4 is equivalent to 1.027 mg C34H48N2O10S,H2O
    Current batch 3980
    QTY (Max 2)
  • Search result 5

    Category Number 25
    Pack size 100 mg
    Substance name azaperone
    Declared content
    100.0% of C19H22FN3O
    Current batch 1865
    QTY (Max 1)
  • Search result 6

    Category Number 534
    Pack size 100 mg
    Substance name azapropazone
    Declared content
    99.8% of C16H20N4O2, 2H2O
    Current batch 1796
    QTY (Max 25)
  • Search result 7

    Category Number 515
    Pack size 10 mg
    Substance name azapropazone impurity A
    Declared content Not applicable
    Current batch 1798
    Discontinued
  • Search result 8

    Category Number 516
    Pack size 10 mg
    Substance name azapropazone impurity B
    Declared content Not applicable
    Current batch 1799
    QTY (Max 25)
  • Search result 9

    Category Number 517
    Pack size 10 mg
    Substance name azapropazone impurity C
    Declared content Not applicable
    Current batch 1797
    Discontinued
  • Search result 10

    Category Number 527
    Pack size 50 mg
    Substance name azapropazone impurity standard
    Declared content Not applicable
    Current batch 1812
    Discontinued