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 600
    Pack size 100 mg
    Substance name fluvoxamine maleate
    Declared content
    99.6% of C15H21F3N2O2,C4H4O4
    Current batch 2680
    QTY (Max 1)

  • Search result 2

    Category Number 671
    Pack size 100 mg
    Substance name fluvoxamine maleate impurity standard
    Declared content Not applicable
    Current batch 3099
    QTY (Max 25)

  • Search result 3

    Category Number 937
    Pack size 150 mg
    Substance name folic acid
    Declared content
    91.2% of C19H19N7O6
    Current batch 3282
    QTY (Max 25)

  • Search result 4

    Category Number 639
    Pack size 25 mg
    Substance name form-2',4'-xylidide
    Declared content Not applicable
    Current batch 3426
    QTY (Max 25)

  • Search result 5

    Category Number 1129
    Pack size 25 mg
    Substance name formononetin
    Declared content Not applicable
    Current batch 3668
    E-mail to order:  bpcrs@mhra.gov.uk

  • Search result 6

    Category Number 997
    Pack size 10 mg
    Substance name foscarnet impurity B
    Declared content Not applicable
    Current batch 3248
    QTY (Max 25)

  • Search result 7

    Category Number 623
    Pack size 100 mg
    Substance name foscarnet sodium
    Declared content
    100% of CNa3O5P,6H2O
    Current batch 4255
    QTY (Max 25)

  • Search result 8

    Category Number 678
    Pack size 50 mg
    Substance name fosfestrol sodium
    Declared content Not applicable
    Current batch 2254
    Discontinued

  • Search result 9

    Category Number 1162
    Pack size 10 mg
    Substance name fosinopril impurity 1
    Declared content Not applicable
    Current batch 3689
    QTY (Max 25)

  • Search result 10

    Category Number 1092
    Pack size 25 mg
    Substance name fosinopril impurity A
    Declared content Not applicable
    Current batch 3448
    QTY (Max 25)

  • Search result 11

    Category Number 1091
    Pack size 100 mg
    Substance name fosinopril sodium
    Declared content
    99.5% of C30H45NNaO7P
    Current batch 3447
    QTY (Max 25)

  • Search result 12

    Category Number 172
    Pack size 1
    Substance name furazolidone
    Declared content Not applicable
    Current batch
    Discontinued

  • Search result 13

    Category Number 547
    Pack size 100 mg
    Substance name furosemide
    Declared content
    99.7% of C12H11ClN2O5S
    Current batch 4360
    QTY (Max 25)

  • Search result 14

    Category Number 1111
    Pack size 100 mg
    Substance name galantamine hydrobromide
    Declared content
    77.9 of C17H21NO3 (for UV)
    77.4% of C17H21NO3 (for HPLC)
    Current batch 3901
    QTY (Max 25)

  • Search result 15

    Category Number 1214
    Pack size 25 mg
    Substance name galantamine hydrobromide impurity standard
    Declared content Not applicable
    Current batch 4080
    QTY (Max 25)

  • Search result 16

    Category Number 643
    Pack size 1
    Substance name gallamine impurity standard
    Declared content Not applicable
    Current batch
    Discontinued

  • Search result 17

    Category Number 363
    Pack size 100 mg
    Substance name gemfibrozil
    Declared content
    99.9% of C15H22O3
    Current batch 2968
    QTY (Max 25)

  • Search result 18

    Category Number 303
    Pack size 10 mg
    Substance name gemfibrozil impurity E
    Declared content Not applicable
    Current batch 3541
    QTY (Max 25)

  • Search result 19

    Category Number 365
    Pack size 100 mg
    Substance name gemfibrozil methyl ester
    Declared content Not applicable
    Current batch 3707
    QTY (Max 25)

  • Search result 20

    Category Number 174
    Pack size 25 mg
    Substance name gentamicin sulfate
    Declared content Not applicable
    Current batch 2898
    QTY (Max 25)

  • Search result 21

    Category Number 175
    Pack size 100 mg
    Substance name glibenclamide
    Declared content
    99.5% of C23H28ClN3O5S
    Current batch 4231
    QTY (Max 25)

  • Search result 22

    Category Number 368
    Pack size 200 mg
    Substance name gliclazide
    Declared content
    99.8% of C15H21N3O3S
    Current batch 4424
    QTY (Max 25)

  • Search result 23

    Category Number 1304
    Pack size 10mg
    Substance name gliclazide impurity A
    Declared content Not applicable
    Current batch 4756
    QTY (Max 25)

  • Search result 24

    Category Number 366
    Pack size 30 mg
    Substance name gliclazide impurity F
    Declared content Not applicable
    Current batch 4190
    QTY (Max 25)

  • Search result 25

    Category Number 1144
    Pack size 100 mg
    Substance name glimepiride
    Declared content
    99.7% of C24H34N4O5S
    Current batch 3596
    QTY (Max 25)