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.

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.

Search within this catalogue

951 items

  • Search result 1

    Category Number 1222
    Pack size 25 mg
    Substance name amlodipine impurity 1
    Declared content Not applicable
    Current batch 4075
    QTY (Max 25)

  • Search result 2

    Category Number 748
    Pack size 25 mg
    Substance name amoxicillin impurity standard
    Declared content Not applicable
    Current batch 4153
    QTY (Max 25)

  • Search result 3

    Category Number 19
    Pack size 500 mg
    Substance name amoxicillin trihydrate
    Declared content
    85.7 % of C¬16H19N3O5S
    Current batch 4594
    QTY (Max 25)

  • Search result 4

    Category Number 21
    Pack size 500 mg
    Substance name ampicillin trihydrate
    Declared content Not applicable
    Current batch 4403
    QTY (Max 25)

  • Search result 5

    Category Number 22
    Pack size 1
    Substance name amprolium hydrochloride
    Declared content Not applicable
    Current batch
    Discontinued

  • Search result 6

    Category Number 1213
    Pack size 100 mg
    Substance name anastrozole
    Declared content
    99.7% of C17H19N5
    Current batch 4048
    QTY (Max 25)

  • Search result 7

    Category Number 785
    Pack size 250 mg
    Substance name anhydrous ampicillin
    Declared content
    99.1% of C16H19N3O4S
    Current batch 4143
    QTY (Max 25)

  • Search result 8

    Category Number 546
    Pack size 250 mg
    Substance name apramycin
    Declared content
    889 units per milligram
    Current batch 4191
    QTY (Max 1)

  • Search result 9

    Category Number 1138
    Pack size 100 mg
    Substance name aprepitant
    Declared content
    99.9% of C23H21F7N4O3
    Current batch 3582
    QTY (Max 25)

  • Search result 10

    Category Number 1148
    Pack size 25 mg
    Substance name aprepitant impurity standard
    Declared content Not applicable
    Current batch 4122
    QTY (Max 25)

  • Search result 11

    Category Number 694
    Pack size 100 mg
    Substance name arginine hydrochloride
    Declared content
    99.9% of C6H14N4O2,HCl (For HPLC)
    99.9% of C6H14N4O2,HCl (ForUV)
    Current batch 3938
    QTY (Max 25)

  • Search result 12

    Category Number 461
    Pack size 100 mg
    Substance name ascorbic acid
    Declared content
    99.7% of C6H8O6
    Current batch 4409
    Out of Stock

  • Search result 13

    Category Number 617
    Pack size 100 mg
    Substance name aspirin
    Declared content
    99.8 % of C9H8O4
    Current batch 4440
    QTY (Max 25)

  • Search result 14

    Category Number 1164
    Pack size 25 mg
    Substance name aspirin impurity standard
    Declared content Not applicable
    Current batch 4776
    QTY (Max 25)

  • Search result 15

    Category Number 492
    Pack size 100 mg
    Substance name atenolol
    Declared content
    99.4% of C14H22N2O3
    Current batch 3714
    Out of Stock

  • Search result 16

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

  • Search result 17

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

  • Search result 18

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

  • Search result 19

    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 20

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

  • Search result 21

    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 22

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

  • Search result 23

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

  • Search result 24

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

  • Search result 25

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