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 583
    Pack size 100 mg
    Substance name meptazinol hydrochloride
    CAS Number 59263-76-2
    Quantitative Yes
    Current batch 3747
    QTY (Max 25)

  • Search result 2

    Category Number 773
    Pack size 100 mg
    Substance name mercaptopurine
    CAS Number 6112-76-1
    Quantitative Yes
    Current batch 4365
    QTY (Max 1)

  • Search result 3

    Category Number 762
    Pack size 25 mg
    Substance name mercaptopurine impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 2902
    QTY (Max 25)

  • Search result 4

    Category Number 1075
    Pack size 125 mg
    Substance name mesalazine
    CAS Number 89-57-6
    Quantitative Yes
    Current batch 3391
    QTY (Max 25)

  • Search result 5

    Category Number 496
    Pack size 50 mg
    Substance name mesoridazine besilate
    CAS Number 32672-69-8
    Quantitative No
    Current batch 1767
    Discontinued

  • Search result 6

    Category Number 911
    Pack size 25 mg
    Substance name metacycline hydrochloride
    CAS Number 3963-95-9
    Quantitative No
    Current batch 3807
    Out of Stock

  • Search result 7

    Category Number 226
    Pack size 100 mg
    Substance name metaraminol tartrate
    CAS Number 33402-03-8
    Quantitative No
    Current batch 4381
    QTY (Max 25)

  • Search result 8

    Category Number 1296
    Pack size 10mg
    Substance name metformin for system suitability
    CAS Number Not applicable
    Quantitative No
    Current batch 4708
    QTY (Max 25)

  • Search result 9

    Category Number 227
    Pack size 100 mg
    Substance name metformin hydrochloride
    CAS Number 1115-70-4
    Quantitative Yes
    Current batch 4642
    QTY (Max 25)

  • Search result 10

    Category Number 1295
    Pack size 10 mg
    Substance name metformin impurity D
    CAS Number Not applicable
    Quantitative No
    Current batch 4610
    Out of Stock

  • Search result 11

    Category Number 552
    Pack size 100 mg
    Substance name methadone hydrochloride
    CAS Number 1095-90-5
    Quantitative Yes
    Current batch 4448
    QTY (Max 5)

  • Search result 12

    Category Number 920
    Pack size 10 mg
    Substance name methyl 3, 5-diamino-6-chloropyrazine-2-carboxylate
    CAS Number 1458-01-1
    Quantitative No
    Current batch 3360
    QTY (Max 25)

  • Search result 13

    Category Number 237
    Pack size 25 mg
    Substance name methyl N-4[2-(5-chloro-2-methoxybenzamido)ethyl]benzenesulfonylcarbamate
    CAS Number 21165-77-5
    Quantitative No
    Current batch 3515
    QTY (Max 25)

  • Search result 14

    Category Number 644
    Pack size 25 mg
    Substance name methyl-4-acetamido-2-hydroxybenzoate
    CAS Number 4093-28-1
    Quantitative No
    Current batch 2150
    QTY (Max 25)

  • Search result 15

    Category Number 240
    Pack size 100 mg
    Substance name methyldopa
    CAS Number 555-30-6
    Quantitative Yes
    Current batch 3034
    QTY (Max 25)

  • Search result 16

    Category Number 241
    Pack size 100 mg
    Substance name methyldopate hydrochloride
    CAS Number 2508-79-4
    Quantitative Yes
    Current batch 2513
    QTY (Max 25)

  • Search result 17

    Category Number 1201
    Pack size 100 mg
    Substance name methylphenidate hydrochloride
    CAS Number 298-59-9
    Quantitative Yes
    Current batch 4013
    QTY (Max 25)

  • Search result 18

    Category Number 662
    Pack size 100 mg
    Substance name methylphenobarbital
    CAS Number 115-38-8
    Quantitative Yes
    Current batch 2265
    QTY (Max 25)

  • Search result 19

    Category Number 248
    Pack size 100 mg
    Substance name methylprednisolone
    CAS Number 83-43-2
    Quantitative Yes
    Current batch 2885
    QTY (Max 25)

  • Search result 20

    Category Number 249
    Pack size 200 mg
    Substance name methylprednisolone acetate
    CAS Number 53-36-1
    Quantitative Yes
    Current batch 3086
    QTY (Max 25)