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.

The BPCRS Catalogue is now available for download in Excel format, updated monthly to reflect the latest listings.

Search within this catalogue

951 items

  • Search result 1

    Category Number 145
    Pack size 100 mg
    Substance name ethopabate
    CAS Number 59-06-3
    Quantitative Yes
    Current batch 2611
    QTY (Max 25)

  • Search result 2

    Category Number 146
    Pack size 200 mg
    Substance name ethosuximide
    CAS Number 77-67-8
    Quantitative Yes
    Current batch 3456
    QTY (Max 25)

  • Search result 3

    Category Number 149
    Pack size 25 mg
    Substance name ethyl meclofenamate
    CAS Number Not applicable
    Quantitative No
    Current batch 1265
    Discontinued

  • Search result 4

    Category Number 150
    Pack size 1
    Substance name ethyldimethyl [2-(2-methylbenzhydryloxy)ethyl]ammonium chloride
    CAS Number Not applicable
    Quantitative Not applicable
    Current batch
    Discontinued

  • Search result 5

    Category Number 529
    Pack size 150 mg
    Substance name etodolac
    CAS Number 41340-25-4
    Quantitative Yes
    Current batch 4282
    QTY (Max 25)

  • Search result 6

    Category Number 541
    Pack size 10 mg
    Substance name etodolac 1-methyl analogue
    CAS Number 109518-50-5
    Quantitative No
    Current batch 4076
    QTY (Max 25)

  • Search result 7

    Category Number 542
    Pack size 10 mg
    Substance name etodolac 8-methyl analogue
    CAS Number 41340-19-6
    Quantitative No
    Current batch 3247
    QTY (Max 25)

  • Search result 8

    Category Number 533
    Pack size 10 mg
    Substance name etodolac acid dimer
    CAS Number Not applicable
    Quantitative No
    Current batch 3229
    Out of Stock

  • Search result 9

    Category Number 885
    Pack size 150 mg
    Substance name etoposide
    CAS Number 33419-42-0
    Quantitative Yes
    Current batch 4829
    QTY (Max 25)

  • Search result 10

    Category Number 1131
    Pack size 100 mg
    Substance name etynodiol diacetate
    CAS Number 297-76-7
    Quantitative Yes
    Current batch 4051
    E-mail to order:  bpcrs@mhra.gov.uk

  • Search result 11

    Category Number 653
    Pack size 100 mg
    Substance name famotidine
    CAS Number 76824-35-6
    Quantitative Yes
    Current batch 3088
    QTY (Max 25)

  • Search result 12

    Category Number 655
    Pack size 25 mg
    Substance name famotidine degradation impurity 1
    CAS Number 107880-74-0
    Quantitative No
    Current batch 3936
    QTY (Max 25)

  • Search result 13

    Category Number 656
    Pack size 25 mg
    Substance name famotidine degradation impurity 2
    CAS Number 76824-16-3
    Quantitative No
    Current batch 3068
    Discontinued

  • Search result 14

    Category Number 654
    Pack size 25 mg
    Substance name famotidine impurity C
    CAS Number 106433-44-7
    Quantitative No
    Current batch 3799
    QTY (Max 25)

  • Search result 15

    Category Number 620
    Pack size 100 mg
    Substance name felbinac
    CAS Number 5728-52-9
    Quantitative Yes
    Current batch 4395
    QTY (Max 25)

  • Search result 16

    Category Number 777
    Pack size 100 mg
    Substance name felodipine
    CAS Number 72509-76-3
    Quantitative Yes
    Current batch 2825
    QTY (Max 25)

  • Search result 17

    Category Number 758
    Pack size 20 mg
    Substance name felodipine impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 2856
    QTY (Max 25)

  • Search result 18

    Category Number 692
    Pack size 100 mg
    Substance name fenbendazole
    CAS Number 43210-67-9
    Quantitative Yes
    Current batch 3808
    QTY (Max 2)

  • Search result 19

    Category Number 693
    Pack size 25 mg
    Substance name fenbendazole impurity 1
    CAS Number 53065-28-4
    Quantitative No
    Current batch 4621
    QTY (Max 25)

  • Search result 20

    Category Number 354
    Pack size 100 mg
    Substance name fenbufen
    CAS Number 36330-85-5
    Quantitative Yes
    Current batch 1871
    QTY (Max 25)