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

953 items

  • Search result 1

    Category Number 46
    Pack size 25 mg
    Substance name 2-(biphenyl-4-yl)propionic acid
    CAS Number 6341-72-6
    Quantitative No
    Current batch 3069
    QTY (Max 25)

  • Search result 2

    Category Number 417
    Pack size 50 mg
    Substance name 2-amino-1-(4-nitrophenyl)propane-1,3-diol
    CAS Number 716-61-0
    Quantitative No
    Current batch 4163
    QTY (Max 25)

  • Search result 3

    Category Number 12
    Pack size 50 mg
    Substance name 2-amino-4,6-dichlorophenol hydrochloride
    CAS Number 5959-39-7
    Quantitative No
    Current batch 4794
    QTY (Max 25)

  • Search result 4

    Category Number 813
    Pack size 25 mg
    Substance name 2-amino-5-chloropyridine
    CAS Number 1072-98-6
    Quantitative No
    Current batch 4503
    QTY (Max 25)

  • Search result 5

    Category Number 24
    Pack size 50 mg
    Substance name 2-azahypoxanthine
    CAS Number 7151-03-3
    Quantitative No
    Current batch 3147
    QTY (Max 25)

  • Search result 6

    Category Number 613
    Pack size 25 mg
    Substance name 2-bromobenzyldimethylamine hydrochloride
    CAS Number Not applicable
    Quantitative No
    Current batch 2420
    QTY (Max 25)

  • Search result 7

    Category Number 477
    Pack size 25 mg
    Substance name 2-carbamoyl-1-methyl-3-[2-(5-methylimidazol-4-ylmethylthio)ethyl]guanidine dihydrochloride
    CAS Number 52568-80-6
    Quantitative No
    Current batch 3332
    QTY (Max 25)

  • Search result 8

    Category Number 559
    Pack size 25 mg
    Substance name 2-chlorothioxanthone
    CAS Number 86-39-5
    Quantitative No
    Current batch 1846
    QTY (Max 25)

  • Search result 9

    Category Number 79
    Pack size 25 mg
    Substance name 2-chlorotritanol
    CAS Number 66774-02-5
    Quantitative No
    Current batch 4333
    QTY (Max 25)

  • Search result 10

    Category Number 478
    Pack size 25 mg
    Substance name 2-cyano-1-methyl-3-[2-(5-methylimidazol-4-ylmethylsulfinyl)ethyl]guanidine
    CAS Number 54237-72-8
    Quantitative No
    Current batch 4034
    QTY (Max 25)

  • Search result 11

    Category Number 361
    Pack size 25 mg
    Substance name 2-diethylaminoethyl-3-(1-naphthyl)-2-(1-naphthylmethyl)propionate oxalate
    CAS Number 115025-99-5
    Quantitative No
    Current batch 4180
    QTY (Max 5)

  • Search result 12

    Category Number 244
    Pack size 50 mg
    Substance name 2-methyl-5-nitroimidazole
    CAS Number 696-23-1
    Quantitative No
    Current batch 2809
    QTY (Max 25)

  • Search result 13

    Category Number 457
    Pack size 50 mg
    Substance name 2-methyl-6-methylaminoheptan-2-ol
    CAS Number 4436-89-9
    Quantitative No
    Current batch 1648
    QTY (Max 25)

  • Search result 14

    Category Number 192
    Pack size 25 mg
    Substance name 2-tert-butylamino-1-(4-hydroxy-3-methylphenyl)ethanol
    CAS Number "2-tert-butylamino-1-(4-hydroxy-3-methylphenyl)ethanol" - CAS No. 18910-64-10 / "2-tert-butylamino-1-(4-hydroxy-3-methylphenyl)ethanol sulfate" - CAS No. 2044704-57-4
    Quantitative No
    Current batch 3891
    QTY (Max 25)

  • Search result 15

    Category Number 332
    Pack size 25 mg
    Substance name 2-thymoxyethyldimethylamine hydrochloride
    CAS Number 60439-42-1
    Quantitative No
    Current batch 1778
    QTY (Max 25)

  • Search result 16

    Category Number 555
    Pack size 25 mg
    Substance name 2-trifluoromethylthioxanthone
    CAS Number 1693-28-3
    Quantitative No
    Current batch 4291
    QTY (Max 25)

  • Search result 17

    Category Number 1101
    Pack size 25 mg
    Substance name 2-[4-[(7-chloro-4-quinolinyl)amino]pentyl] amino ethanol
    CAS Number 4298-15-1
    Quantitative No
    Current batch 4393
    QTY (Max 25)

  • Search result 18

    Category Number 341
    Pack size 50 mg
    Substance name 3,5,6-trichloro-2-hydroxybenzoic acid
    CAS Number 40932-60-3
    Quantitative No
    Current batch 4696
    QTY (Max 25)

  • Search result 19

    Category Number 608
    Pack size 25 mg
    Substance name 3-(1,5-dibenzyl-1H-indazole-3-yl)oxypropyldimethylamine hydrochloride
    CAS Number 2196183-71-6
    Quantitative No
    Current batch 4206
    QTY (Max 25)

  • Search result 20

    Category Number 360
    Pack size 25 mg
    Substance name 3-(1-naphthyl)-2-tetrahydrofurfurylpropionic acid
    CAS Number 25379-26-4
    Quantitative No
    Current batch 3314
    QTY (Max 25)

  • Search result 21

    Category Number 124
    Pack size 25 mg
    Substance name 3-(dibenzo[b,e]thiepin-11(6H)-ylidene)-N,N-dimethylaminopropan-1-amine S-oxide hydrochloride
    CAS Number 42046-35-5 (free base)
    Quantitative No
    Current batch 2655
    Discontinued

  • Search result 22

    Category Number 839
    Pack size 25 mg
    Substance name 3-amino-4-(2-chlorophenyl)-6-nitroquinolin-2(1H)-one
    CAS Number 55198-89-5
    Quantitative No
    Current batch 4785
    QTY (Max 25)

  • Search result 23

    Category Number 536
    Pack size 25 mg
    Substance name 3-amino-4-phenoxy-5-sulfamoylbenzoic acid
    CAS Number 28328-54-3
    Quantitative No
    Current batch 4598
    QTY (Max 25)

  • Search result 24

    Category Number 14
    Pack size 50 mg
    Substance name 3-amino-4-propoxybenzoic acid
    CAS Number 59691-14-4
    Quantitative No
    Current batch 3770
    QTY (Max 25)

  • Search result 25

    Category Number 374
    Pack size 50 mg
    Substance name 3-amino-6-chloro-1-methyl-4-phenylquinolin-2(1H)-one
    CAS Number 5220-02-0
    Quantitative No
    Current batch 3959
    QTY (Max 1)