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 676
    Pack size 100 mg
    Substance name flecainide acetate
    Declared content
    99.3% of C17H20F6N2O3,C2H4O2
    Current batch 4492
    QTY (Max 25)

  • Search result 2

    Category Number 158
    Pack size 250 mg
    Substance name flucloxacillin sodium
    Declared content
    94.6% of C19H16ClFN3NaO5S for HPLC and 96.0% of C19H16ClFN3NaO5S for UV
    Current batch 4735
    QTY (Max 25)

  • Search result 3

    Category Number 1174
    Pack size 100 mg
    Substance name fluconazole
    Declared content
    99.4% of C13H12F2N6O
    Current batch 4290
    QTY (Max 25)

  • Search result 4

    Category Number 1175
    Pack size 50 mg
    Substance name fluconazole impurity standard
    Declared content Not applicable
    Current batch 4888
    QTY (Max 1)

  • Search result 5

    Category Number 1321
    Pack size 100mg
    Substance name fludarabine phosphate
    Declared content
    97.8 % of C10H13FN5O7P
    Current batch 4844
    QTY (Max 25)

  • Search result 6

    Category Number 159
    Pack size 50 mg
    Substance name fludrocortisone acetate
    Declared content
    99.8% of C23H31FO6
    Current batch 3842
    QTY (Max 25)

  • Search result 7

    Category Number 1156
    Pack size 100 mg
    Substance name flumetasone pivalate
    Declared content
    99.9% of C27H36F2O6
    Current batch 3827
    QTY (Max 25)

  • Search result 8

    Category Number 840
    Pack size 25 mg
    Substance name flunitrazepam
    Declared content Not applicable
    Current batch 2980
    Out of Stock

  • Search result 9

    Category Number 160
    Pack size 50 mg
    Substance name fluocinolone acetonide
    Declared content
    98.0% of C24H30F2O6
    Current batch 3996
    QTY (Max 25)

  • Search result 10

    Category Number 489
    Pack size 100 mg
    Substance name fluocinonide
    Declared content
    98.1% of C26H32F2O7
    Current batch 1730
    QTY (Max 2)

  • Search result 11

    Category Number 161
    Pack size 50 mg
    Substance name fluocortolone hexanoate
    Declared content
    98.5% of C28H39FO5
    Current batch 2111
    Discontinued

  • Search result 12

    Category Number 162
    Pack size 50 mg
    Substance name fluocortolone pivalate
    Declared content
    98.0% of C27H37FO5
    Current batch 1610
    Discontinued

  • Search result 13

    Category Number 573
    Pack size 100 mg
    Substance name fluorometholone
    Declared content
    99.8% of C22H29FO4
    Current batch 3009
    QTY (Max 25)

  • Search result 14

    Category Number 995
    Pack size 40 mg
    Substance name fluorouracil
    Declared content Not applicable
    Current batch 3246
    QTY (Max 25)

  • Search result 15

    Category Number 797
    Pack size 250 mg
    Substance name fluoxetine hydrochloride
    Declared content
    97.6 % of C17H18F3NO,HCl
    Current batch 4832
    QTY (Max 25)

  • Search result 16

    Category Number 164
    Pack size 50 mg
    Substance name fluoxymesterone
    Declared content Not applicable
    Current batch 2995
    Out of Stock

  • Search result 17

    Category Number 554
    Pack size 100 mg
    Substance name flupentixol decanoate dihydrochloride
    Declared content
    99.5% of C33H43F3N2O2S, 2HCl
    Current batch 3084
    QTY (Max 25)

  • Search result 18

    Category Number 1132
    Pack size 100 mg
    Substance name flupentixol dihydrochloride
    Declared content
    83.2 % of C23H25F3N2OS
    Current batch 4727
    QTY (Max 25)

  • Search result 19

    Category Number 167
    Pack size 100 mg
    Substance name fluphenazine hydrochloride
    Declared content
    99.2% of C22H26F3N3OS, 2HCl
    Current batch 3749
    QTY (Max 25)

  • Search result 20

    Category Number 574
    Pack size 100 mg
    Substance name flurbiprofen sodium
    Declared content
    99.6% of C15H13FO2
    108.5% of C15H12FNaO2
    123.2% of C15H12FNaO2, 2H2O
    Current batch 4060
    QTY (Max 1)

  • Search result 21

    Category Number 587
    Pack size 100 mg
    Substance name fluticasone propionate
    Declared content
    99.7% of C25H31F3O5S
    Current batch 4030
    QTY (Max 25)

  • Search result 22

    Category Number 588
    Pack size 25 mg
    Substance name fluticasone S-methyl impurity
    Declared content Not applicable
    Current batch 3322
    Discontinued

  • Search result 23

    Category Number 1189
    Pack size 25 mg
    Substance name fluvastatin impurity F
    Declared content
    See leaflet provided with the BPCRS
    Current batch 4589
    QTY (Max 25)

  • Search result 24

    Category Number 1163
    Pack size 100 mg
    Substance name fluvastatin sodium
    Declared content
    97.4% of C24H25NNaO4
    Current batch 4581
    QTY (Max 25)

  • Search result 25

    Category Number 1190
    Pack size 25 mg
    Substance name fluvoxamine impurity D
    Declared content Not applicable
    Current batch 3912
    QTY (Max 25)