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 582
    Pack size 1
    Substance name 6,6'-dimethoxy-2,2'-binaphthyl
    Declared content Not applicable
    Current batch
    Discontinued

  • Search result 2

    Category Number 443
    Pack size 25 mg
    Substance name 6-(2-chlorophenyl)-2,4-dihydro-2-[(dimethylamino)methylene]8-nitroimidazo[1,2-a][1,4]benzodiazepin-1-one
    Declared content Not applicable
    Current batch 1509
    QTY (Max 25)

  • Search result 3

    Category Number 442
    Pack size 25 mg
    Substance name 6-chloro-1,4-dihydro-1-methyl-4-phenylquinazolin-4-ol
    Declared content Not applicable
    Current batch 3810
    QTY (Max 2)

  • Search result 4

    Category Number 376
    Pack size 50 mg
    Substance name 6-chloro-4-(2-chlorophenyl)quinazoline-2-carboxaldehyde
    Declared content Not applicable
    Current batch 4462
    QTY (Max 25)

  • Search result 5

    Category Number 871
    Pack size 50 mg
    Substance name 6-epidoxycycline hydrochloride
    Declared content Not applicable
    Current batch 3914
    Discontinued

  • Search result 6

    Category Number 11
    Pack size 20 mg
    Substance name 7-aminodesacetoxycephalosporanic acid
    Declared content Not applicable
    Current batch 3109
    QTY (Max 25)

  • Search result 7

    Category Number 470
    Pack size 25 mg
    Substance name 7-chloro-1-5-dihydro-5-phenyl-1,5-benzodiazepine-2,4(3H)-dione
    Declared content Not applicable
    Current batch 1588
    Discontinued

  • Search result 8

    Category Number 626
    Pack size 25 mg
    Substance name 8s-isopropyl-3β-hydroxytropanium bromide
    Declared content Not applicable
    Current batch 4230
    QTY (Max 25)

  • Search result 9

    Category Number 560
    Pack size 25 mg
    Substance name 9-allyl-2-chlorothioxanthen-9-ol
    Declared content Not applicable
    Current batch 1848
    QTY (Max 25)

  • Search result 10

    Category Number 2
    Pack size 25 mg
    Substance name <N1,N2>-diquinoxalin-2-ylsulphanilamide
    Declared content Not applicable
    Current batch 1455
    Discontinued

  • Search result 11

    Category Number 1114
    Pack size 20 mg
    Substance name abacavir impurity 1
    Declared content Not applicable
    Current batch 4748
    QTY (Max 25)

  • Search result 12

    Category Number 1113
    Pack size 10 mg
    Substance name abacavir impurity standard
    Declared content Not applicable
    Current batch 3766
    QTY (Max 25)

  • Search result 13

    Category Number 1112
    Pack size 100 mg
    Substance name abacavir sulfate
    Declared content
    99.7% of C28H38N12O6S
    Current batch 3637
    QTY (Max 25)

  • Search result 14

    Category Number 1172
    Pack size 100 mg
    Substance name acamprosate calcium
    Declared content
    100 % of C10H20CaN2O8S2
    Current batch 3798
    QTY (Max 25)

  • Search result 15

    Category Number 1
    Pack size 50 mg
    Substance name acepromazine maleate
    Declared content Not applicable
    Current batch 2608
    QTY (Max 2)

  • Search result 16

    Category Number 904
    Pack size 600 mg
    Substance name acetazolamide
    Declared content
    99.8% of C4H6N4O3S2
    Current batch 4345
    QTY (Max 25)

  • Search result 17

    Category Number 907
    Pack size 200 mg
    Substance name acetylcysteine
    Declared content
    99.7 % of C5H9NO3S
    Current batch 4501
    QTY (Max 25)

  • Search result 18

    Category Number 438
    Pack size 100 mg
    Substance name aciclovir
    Declared content
    94.2 % of C8H11N5O3
    Current batch 4459
    QTY (Max 25)

  • Search result 19

    Category Number 827
    Pack size 100 mg
    Substance name acitretin
    Declared content
    100.0% of C21H26O3
    Current batch 2923
    QTY (Max 25)

  • Search result 20

    Category Number 1120
    Pack size 100 mg
    Substance name adapalene
    Declared content
    99.7% of C28H28O3
    Current batch 4632
    QTY (Max 25)

  • Search result 21

    Category Number 1121
    Pack size 10 mg
    Substance name adapalene impurity standard
    Declared content Not applicable
    Current batch 4839
    Out of Stock

  • Search result 22

    Category Number 3
    Pack size 100 mg
    Substance name adrenaline acid tartrate
    Declared content
    99.9% of C9H13NO3,C4H6O6
    54.9% of C9H13NO3
    Current batch 4582
    QTY (Max 25)

  • Search result 23

    Category Number 1251
    Pack size 25 mg
    Substance name adrenaline impurity standard
    Declared content Not applicable
    Current batch 4280
    QTY (Max 10)

  • Search result 24

    Category Number 763
    Pack size 100 mg
    Substance name albendazole
    Declared content
    97.6% of C12H15N3O2S
    Current batch 4094
    QTY (Max 25)

  • Search result 25

    Category Number 436
    Pack size 1 g
    Substance name alexandrian senna fruit powder
    Declared content
    4.8% w/w “as is” based on the assay for Alexandrian Senna Fruit BP Monograph 2020 and expressed as total sennosides
    Current batch 4814
    QTY (Max 1)