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 1141
    Pack size 25 mg
    Substance name glimepiride for system suitability
    Declared content Not applicable
    Current batch 4864
    QTY (Max 25)

  • Search result 2

    Category Number 580
    Pack size 150 mg
    Substance name gliquidone
    Declared content
    99.7 % of C27H33N3O6S
    Current batch 3880
    Discontinued

  • Search result 3

    Category Number 581
    Pack size 25 mg
    Substance name gliquidone sulfonamide
    Declared content Not applicable
    Current batch 2006
    QTY (Max 25)

  • Search result 4

    Category Number 652
    Pack size 5 ml
    Substance name glyceryl trinitrate solution
    Declared content
    0.9939% w/w of C3H5N3O9 solution or 1.0337% w/v of C3H5N3O9 solution
    Current batch 4772
    E-mail to order:  bpcrs@mhra.gov.uk

  • Search result 5

    Category Number 1110
    Pack size 100 mg
    Substance name glycopyrronium bromide
    Declared content
    99.9% of C19H28BrNO3
    Current batch 4718
    QTY (Max 25)

  • Search result 6

    Category Number 814
    Pack size 10 mg
    Substance name goserelin hexapeptide
    Declared content Not applicable
    Current batch 2893
    QTY (Max 25)

  • Search result 7

    Category Number 180
    Pack size 1
    Substance name griseofulvin
    Declared content
    98.3 % of C17H17ClO6 for GC
    99.8% of C17H17ClO6 for UV
    Current batch 4023
    Discontinued

  • Search result 8

    Category Number 181
    Pack size 100 mg
    Substance name guanethidine monosulfate
    Declared content
    99.5% of C10H22N4,H2SO4
    Current batch 2430
    QTY (Max 25)

  • Search result 9

    Category Number 879
    Pack size 25 mg
    Substance name guanine
    Declared content Not applicable
    Current batch 3128
    QTY (Max 25)

  • Search result 10

    Category Number 407
    Pack size 150 mg
    Substance name haloperidol
    Declared content
    99.8 % of C21H23ClFNO2
    Current batch 4358
    QTY (Max 25)

  • Search result 11

    Category Number 182
    Pack size 1
    Substance name haloxon
    Declared content Not applicable
    Current batch
    Discontinued

  • Search result 12

    Category Number 185
    Pack size 100 mg
    Substance name homatropine hydrobromide
    Declared content
    99.7% of C16H21NO3.HBr
    Current batch 4371
    QTY (Max 25)

  • Search result 13

    Category Number 186
    Pack size 200 mg
    Substance name hydrochlorothiazide
    Declared content
    99.3% of C7H8ClN3O4S2
    Current batch 3093
    QTY (Max 25)

  • Search result 14

    Category Number 576
    Pack size 100 mg
    Substance name hydrocortisone
    Declared content
    99.5% of C21H30O5
    Current batch 4355
    QTY (Max 25)

  • Search result 15

    Category Number 584
    Pack size 100 mg
    Substance name hydrocortisone acetate
    Declared content
    98.8% of C23H32O6
    Current batch 3338
    QTY (Max 25)

  • Search result 16

    Category Number 187
    Pack size 100 mg
    Substance name hydrocortisone hydrogen succinate
    Declared content Not applicable
    Current batch 4386
    QTY (Max 25)

  • Search result 17

    Category Number 188
    Pack size 100 mg
    Substance name hydrocortisone sodium phosphate
    Declared content Not applicable
    Current batch 3325
    QTY (Max 25)

  • Search result 18

    Category Number 190
    Pack size 100 mg
    Substance name hydroflumethiazide
    Declared content Not applicable
    Current batch 1931
    QTY (Max 25)

  • Search result 19

    Category Number 1206
    Pack size 100 mg
    Substance name hydroquinone
    Declared content
    99.7% of C6H6O2
    Current batch 3950
    QTY (Max 25)

  • Search result 20

    Category Number 197
    Pack size 200 mg
    Substance name hydroxycarbamide
    Declared content
    99.6% of CH4N2O2
    Current batch 3545
    QTY (Max 25)

  • Search result 21

    Category Number 1100
    Pack size 100 mg
    Substance name hydroxychloroquine sulfate
    Declared content
    99.7% of C18H26CIN3O, H2SO4
    Current batch 3484
    QTY (Max 25)

  • Search result 22

    Category Number 193
    Pack size 1
    Substance name hydroxyprogesterone caproate
    Declared content Not applicable
    Current batch
    Discontinued

  • Search result 23

    Category Number 841
    Pack size 100 mg
    Substance name hydroxyzine hydrochloride
    Declared content
    99.4 % of C21H27ClN2O2,2HCl
    Current batch 3745
    QTY (Max 25)

  • Search result 24

    Category Number 198
    Pack size 100 mg
    Substance name hyoscine butylbromide
    Declared content
    98.7% of C21H30BrNO4
    Current batch 4838
    QTY (Max 25)

  • Search result 25

    Category Number 199
    Pack size 200 mg
    Substance name hyoscine hydrobromide
    Declared content
    88.3 % of C17H21NO4,HBr
    Current batch 4437
    Out of Stock