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 1291
    Pack size 100mg
    Substance name donepezil hydrochloride
    Declared content
    94.0% of C24H29NO3,HCl
    Current batch 4604
    QTY (Max 25)

  • Search result 2

    Category Number 1292
    Pack size 10mg
    Substance name donepezil impurity standard
    Declared content Not applicable
    Current batch 4703
    QTY (Max 10)

  • Search result 3

    Category Number 468
    Pack size 100 mg
    Substance name dopamine hydrochloride
    Declared content
    100.0% of C8H11NO2,HCl
    Current batch 3542
    QTY (Max 25)

  • Search result 4

    Category Number 1069
    Pack size 100 mg
    Substance name dorzolamide hydrochloride
    Declared content
    99.4% of C10H16N2O4S3,HCl
    Current batch 4722
    QTY (Max 25)

  • Search result 5

    Category Number 1070
    Pack size 25 mg
    Substance name dorzolamide impurity B
    Declared content Not applicable
    Current batch 4569
    QTY (Max 25)

  • Search result 6

    Category Number 1071
    Pack size 25 mg
    Substance name dorzolamide impurity D
    Declared content Not applicable
    Current batch 4312
    QTY (Max 25)

  • Search result 7

    Category Number 134
    Pack size 100 mg
    Substance name dosulepin hydrochloride
    Declared content
    99.9% of C19H21NS,HCl
    Current batch 3012
    QTY (Max 1)

  • Search result 8

    Category Number 135
    Pack size 100 mg
    Substance name doxapram hydrochloride
    Declared content
    100.1% of C24H30N2O2,HCl,H2O
    Current batch 4227
    QTY (Max 25)

  • Search result 9

    Category Number 1301
    Pack size 10mg
    Substance name doxazosin impurity standard
    Declared content Not applicable
    Current batch 4775
    QTY (Max 25)

  • Search result 10

    Category Number 1300
    Pack size 100mg
    Substance name doxazosin mesilate
    Declared content
    99.2% ofC24H29N5O8S
    Current batch 4753
    QTY (Max 25)

  • Search result 11

    Category Number 136
    Pack size 100 mg
    Substance name doxepin hydrochloride
    Declared content
    21.7% of the cis-isomer of C19H21NO,HCl
    99.5% of cis- and trans-isomers of C19H21NO,HCl
    Current batch 4160
    QTY (Max 25)

  • Search result 12

    Category Number 823
    Pack size 25 mg
    Substance name doxepin impurity standard
    Declared content Not applicable
    Current batch 4049
    QTY (Max 1)

  • Search result 13

    Category Number 990
    Pack size 100 mg
    Substance name doxorubicin hydrochloride
    Declared content
    99.0% of C27H29NO11,HCl
    Current batch 3285
    QTY (Max 25)

  • Search result 14

    Category Number 780
    Pack size 100 mg
    Substance name doxycycline hyclate
    Declared content
    89.9% of C22H25ClN2O8
    83.1% of C22H24N2O8
    Current batch 4127
    QTY (Max 25)

  • Search result 15

    Category Number 675
    Pack size 100 mg
    Substance name droperidol
    Declared content
    99.3% of C22H22FN3O2
    Current batch 3429
    QTY (Max 25)

  • Search result 16

    Category Number 1289
    Pack size 100mg
    Substance name duloxetine hydrochloride
    Declared content
    99.9 % ofC18H19NOS,HCl
    Current batch 4605
    QTY (Max 25)

  • Search result 17

    Category Number 1290
    Pack size 10mg
    Substance name duloxetine impurity standard
    Declared content Not applicable
    Current batch 4693
    QTY (Max 25)

  • Search result 18

    Category Number 138
    Pack size 50 mg
    Substance name dydrogesterone
    Declared content Not applicable
    Current batch 2801
    Discontinued

  • Search result 19

    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 20

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

  • Search result 21

    Category Number 741
    Pack size 100 mg
    Substance name enalapril maleate
    Declared content
    99.8% of C20H28N2O5,C4H4O4
    Current batch 2673
    QTY (Max 5)

  • Search result 22

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

  • Search result 23

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

  • Search result 24

    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 25

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