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

955 items

  • Search result 1

    Category Number 768
    Pack size 100 mg
    Substance name mometasone furoate
    CAS Number 83919-23-7
    Quantitative Yes
    Current batch 4500
    QTY (Max 25)

  • Search result 2

    Category Number 1283
    Pack size 25 mg
    Substance name mometasone impurity D
    CAS Number Not applicable
    Quantitative No
    Current batch 4499
    QTY (Max 25)

  • Search result 3

    Category Number 254
    Pack size 100 mg
    Substance name monosulfiram
    CAS Number 95-05-6
    Quantitative No
    Current batch 3928
    QTY (Max 10)

  • Search result 4

    Category Number 1147
    Pack size 300 mg
    Substance name montelukast dicyclohexylamine
    CAS Number 577953-88-9
    Quantitative Yes
    Current batch 3652
    QTY (Max 10)

  • Search result 5

    Category Number 255
    Pack size 1
    Substance name morphine hydrochloride
    CAS Number 52-26-6
    Quantitative Yes
    Current batch
    Discontinued

  • Search result 6

    Category Number 648
    Pack size 100 mg
    Substance name morphine sulfate
    CAS Number 6211-15-0
    Quantitative Yes
    Current batch 3127
    QTY (Max 5)

  • Search result 7

    Category Number 1109
    Pack size 100 mg
    Substance name moxidectin
    CAS Number 113507-06-5
    Quantitative Yes
    Current batch 4840
    QTY (Max 25)

  • Search result 8

    Category Number 1235
    Pack size 100 mg
    Substance name moxonidine
    CAS Number 75438-57-2
    Quantitative Yes
    Current batch 4120
    QTY (Max 25)

  • Search result 9

    Category Number 1236
    Pack size 25 mg
    Substance name moxonidine impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4149
    QTY (Max 25)

  • Search result 10

    Category Number 804
    Pack size 100 mg
    Substance name mupirocin lithium
    CAS Number 73346-79-9
    Quantitative Yes
    Current batch 4520
    QTY (Max 25)

  • Search result 11

    Category Number 1254
    Pack size 100 mg
    Substance name mycophenolate mofetil
    CAS Number 128794-94-5
    Quantitative Yes
    Current batch 4256
    QTY (Max 25)

  • Search result 12

    Category Number 1255
    Pack size 25 mg
    Substance name mycophenolate mofetil impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4306
    QTY (Max 25)

  • Search result 13

    Category Number 640
    Pack size 25 mg
    Substance name N,N'-bis(2,4-xylyl)formamidine
    CAS Number 16596-04-6
    Quantitative No
    Current batch 3463
    QTY (Max 25)

  • Search result 14

    Category Number 1104
    Pack size 25 mg
    Substance name N-(2-hydroxyethyl)isonicotinamide nitric ester
    CAS Number 65141-47-1
    Quantitative No
    Current batch 3507
    QTY (Max 25)

  • Search result 15

    Category Number 889
    Pack size 10 mg
    Substance name N-demethylerythromycin A
    CAS Number 992-62-1
    Quantitative No
    Current batch 3198
    Out of Stock

  • Search result 16

    Category Number 730
    Pack size 25 mg
    Substance name N-desalkylflurazepam
    CAS Number 2886-65-9
    Quantitative No
    Current batch 4209
    QTY (Max 25)

  • Search result 17

    Category Number 437
    Pack size 500 mg
    Substance name N-ethylglucamine hydrochloride
    CAS Number Not applicable
    Quantitative No
    Current batch 1510
    Discontinued

  • Search result 18

    Category Number 846
    Pack size 25 mg
    Substance name N-methyl-2-(pyridin-2-yl)-N-[2-(pyridine-2-yl)ethyl]ethanamine trihydrochloride
    CAS Number 2095467-43-7
    Quantitative No
    Current batch 4891
    QTY (Max 25)

  • Search result 19

    Category Number 641
    Pack size 30 mg
    Substance name N-methyl-N'-(2,4-xylyl)formamidine
    CAS Number 33089-74-6
    Quantitative No
    Current batch 3464
    QTY (Max 25)

  • Search result 20

    Category Number 756
    Pack size 25 mg
    Substance name N-p-chlorobenzoyltyramine
    CAS Number 41859-57-8
    Quantitative No
    Current batch 2752
    QTY (Max 25)