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 498
    Pack size 100 mg
    Substance name sotalol hydrochloride
    Declared content Not applicable
    Current batch 2517
    QTY (Max 25)

  • Search result 2

    Category Number 306
    Pack size 150 mg
    Substance name spironolactone
    Declared content
    99.3% of C24H32O4S
    Current batch 4356
    QTY (Max 25)

  • Search result 3

    Category Number 818
    Pack size 1000 mg
    Substance name sucrose
    Declared content
    100.0% of C12H22O11
    Current batch 4278
    Out of Stock

  • Search result 4

    Category Number 312
    Pack size 100 mg
    Substance name sulfadiazine
    Declared content
    99.8% of C10H10N4O2S
    Current batch 2431
    QTY (Max 25)

  • Search result 5

    Category Number 310
    Pack size 100 mg
    Substance name sulfadoxine
    Declared content
    99.7% of C12H14N4O4S
    Current batch 2429
    Discontinued

  • Search result 6

    Category Number 314
    Pack size 100 mg
    Substance name sulfamethoxazole
    Declared content
    99.7% of C10H11N3O3S
    Current batch 3454
    QTY (Max 25)

  • Search result 7

    Category Number 1039
    Pack size 25 mg
    Substance name sulfapyridine
    Declared content Not applicable
    Current batch 3351
    QTY (Max 25)

  • Search result 8

    Category Number 779
    Pack size 250 mg
    Substance name sulfasalazine
    Declared content
    99.6% of C18H14N4O5S
    Current batch 2827
    QTY (Max 25)

  • Search result 9

    Category Number 1041
    Pack size 50 mg
    Substance name sulindac
    Declared content Not applicable
    Current batch 4625
    QTY (Max 25)

  • Search result 10

    Category Number 679
    Pack size 100 mg
    Substance name sulpiride
    Declared content
    100% of C15H23N3O4S
    Current batch 3966
    QTY (Max 25)

  • Search result 11

    Category Number 745
    Pack size 25 mg
    Substance name sumatriptan impurity standard
    Declared content Not applicable
    Current batch 2791
    E-mail to order:  bpcrs@mhra.gov.uk

  • Search result 12

    Category Number 950
    Pack size 100 mg
    Substance name sumatriptan succinate
    Declared content
    99.0% of C18H27N3O6S
    Current batch 3300
    QTY (Max 25)

  • Search result 13

    Category Number 1225
    Pack size 100 mg
    Substance name tamoxifen citrate
    Declared content
    65.8% of C26H29NO
    Current batch 4097
    QTY (Max 25)

  • Search result 14

    Category Number 876
    Pack size 100 mg
    Substance name tamsulosin hydrochloride
    Declared content
    99.9 % of C20H28N2O5S,HCl
    Current batch 4474
    QTY (Max 25)

  • Search result 15

    Category Number 877
    Pack size 25 mg
    Substance name tamsulosin hydrochloride impurity standard
    Declared content Not applicable
    Current batch 4531
    QTY (Max 25)

  • Search result 16

    Category Number 1202
    Pack size 100 mg
    Substance name telmisartan
    Declared content
    99.4% of C33H30N4O2
    Current batch 3971
    QTY (Max 25)

  • Search result 17

    Category Number 455
    Pack size 100 mg
    Substance name temazepam
    Declared content
    100.0% of C16H13ClN2O2
    Current batch 4166
    Out of Stock

  • Search result 18

    Category Number 1246
    Pack size 100 mg
    Substance name temozolomide
    Declared content
    99.5% of C6H6N6O2
    Current batch 4247
    QTY (Max 2)

  • Search result 19

    Category Number 708
    Pack size 100 mg
    Substance name tenoxicam
    Declared content
    99.6% of C13H11N3O4S2
    Current batch 4260
    QTY (Max 25)

  • Search result 20

    Category Number 709
    Pack size 25 mg
    Substance name tenoxicam degradation impurity standard
    Declared content Not applicable
    Current batch 4438
    QTY (Max 25)

  • Search result 21

    Category Number 1159
    Pack size 100 mg
    Substance name terbinafine hydrochloride
    Declared content
    99.7% of C21H26CIN
    88.6% of C21H25N
    Current batch 3801
    QTY (Max 25)

  • Search result 22

    Category Number 1045
    Pack size 15 mg
    Substance name terbutaline impurity C
    Declared content Not applicable
    Current batch 3253
    QTY (Max 25)

  • Search result 23

    Category Number 1317
    Pack size 100mg
    Substance name terbutaline impurity standard
    Declared content Not applicable
    Current batch 4877
    QTY (Max 25)

  • Search result 24

    Category Number 318
    Pack size 100 mg
    Substance name terbutaline sulfate
    Declared content
    99.9% of (C12H19NO3)2,H2SO4
    Current batch 3165
    QTY (Max 25)

  • Search result 25

    Category Number 650
    Pack size 100 mg
    Substance name terfenadine
    Declared content
    99.8% of C32H41NO2
    Current batch 2210
    QTY (Max 25)