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

  • Search result 2

    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 3

    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 4

    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 5

    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 6

    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 7

    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 8

    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 9

    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 10

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