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.

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  • Search result 1

    Category Number 541
    Pack size 10 mg
    Substance name etodolac 1-methyl analogue
    Declared content Not applicable
    Current batch 4076
    QTY (Max 25)
  • Search result 2

    Category Number 542
    Pack size 10 mg
    Substance name etodolac 8-methyl analogue
    Declared content Not applicable
    Current batch 3247
    QTY (Max 25)
  • Search result 3

    Category Number 533
    Pack size 10 mg
    Substance name etodolac acid dimer
    Declared content Not applicable
    Current batch 3229
    Out of Stock
  • Search result 4

    Category Number 885
    Pack size 150 mg
    Substance name etoposide
    Declared content
    96.2 % of C29H32O13
    Current batch 4829
    QTY (Max 25)
  • Search result 5

    Category Number 1131
    Pack size 100 mg
    Substance name etynodiol diacetate
    Declared content
    97.8% of C24H32O4
    Current batch 4051
    E-mail to order:  bpcrs@mhra.gov.uk
  • Search result 6

    Category Number 653
    Pack size 100 mg
    Substance name famotidine
    Declared content
    99.7% of C8H15N7O2S3
    Current batch 3088
    QTY (Max 25)
  • Search result 7

    Category Number 655
    Pack size 25 mg
    Substance name famotidine degradation impurity 1
    Declared content Not applicable
    Current batch 3936
    QTY (Max 25)
  • Search result 8

    Category Number 656
    Pack size 25 mg
    Substance name famotidine degradation impurity 2
    Declared content Not applicable
    Current batch 3068
    Discontinued
  • Search result 9

    Category Number 654
    Pack size 25 mg
    Substance name famotidine impurity C
    Declared content Not applicable
    Current batch 3799
    Out of Stock
  • Search result 10

    Category Number 620
    Pack size 100 mg
    Substance name felbinac
    Declared content
    100.0% of C14H12O2
    Current batch 4395
    QTY (Max 25)
  • Search result 11

    Category Number 777
    Pack size 100 mg
    Substance name felodipine
    Declared content
    99.8% of C18H19Cl2NO4
    Current batch 2825
    QTY (Max 25)
  • Search result 12

    Category Number 758
    Pack size 20 mg
    Substance name felodipine impurity standard
    Declared content Not applicable
    Current batch 2856
    QTY (Max 25)
  • Search result 13

    Category Number 692
    Pack size 100 mg
    Substance name fenbendazole
    Declared content
    99.6% of C15H13N3O2S
    Current batch 3808
    QTY (Max 2)
  • Search result 14

    Category Number 693
    Pack size 25 mg
    Substance name fenbendazole impurity 1
    Declared content Not applicable
    Current batch 4621
    QTY (Max 25)
  • Search result 15

    Category Number 354
    Pack size 100 mg
    Substance name fenbufen
    Declared content
    99.6% of C16H14O3
    Current batch 1871
    QTY (Max 25)
  • Search result 16

    Category Number 1280
    Pack size 100mg
    Substance name fenofibrate
    Declared content
    99.9% ofC20H21ClO4
    Current batch 4596
    QTY (Max 25)
  • Search result 17

    Category Number 661
    Pack size 25 mg
    Substance name fenoterol degradation impurity A
    Declared content Not applicable
    Current batch 3744
    Discontinued
  • Search result 18

    Category Number 660
    Pack size 100 mg
    Substance name fenoterol hydrobromide
    Declared content
    97.6 % of C17H21NO4,HBr
    Current batch 3879
    Discontinued
  • Search result 19

    Category Number 665
    Pack size 100 mg
    Substance name fentanyl citrate
    Declared content
    63.1% of C22H28N2O
    Current batch 4391
    Out of Stock
  • Search result 20

    Category Number 666
    Pack size 25 mg
    Substance name fentanyl impurity A
    Declared content Not applicable
    Current batch 4321
    Discontinued
  • Search result 21

    Category Number 156
    Pack size 0.25 mL
    Substance name fenthion
    Declared content
    96.3% of C10H15O3PS2
    Current batch 2679
    Discontinued
  • Search result 22

    Category Number 1095
    Pack size 100 mg
    Substance name fexofenadine hydrochloride
    Declared content
    99.2% of C32H39NO4, HCl
    Current batch 3476
    QTY (Max 25)
  • Search result 23

    Category Number 1096
    Pack size 25 mg
    Substance name fexofenadine impurity standard
    Declared content Not applicable
    Current batch 3679
    QTY (Max 25)
  • Search result 24

    Category Number 740
    Pack size 100 mg
    Substance name finasteride
    Declared content
    99.9% of C23H36N2O2
    Current batch 2559
    QTY (Max 25)
  • Search result 25

    Category Number 571
    Pack size 100 mg
    Substance name flavoxate hydrochloride
    Declared content
    99.8% of C24H25NO4,HCl
    Current batch 2263
    QTY (Max 2)