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 770
    Pack size 25 mg
    Substance name 4'-hydroxyacetophenone
    CAS Number 99-93-4
    Quantitative No
    Current batch 2796
    QTY (Max 25)

  • Search result 2

    Category Number 557
    Pack size 100 mg
    Substance name 4'-isobutylacetophenone
    CAS Number 38861-78-8
    Quantitative No
    Current batch 3042
    QTY (Max 5)

  • Search result 3

    Category Number 681
    Pack size 25 mg
    Substance name 4-acetyl-2-fluorobiphenyl
    CAS Number Not applicable
    Quantitative No
    Current batch 2249
    QTY (Max 25)

  • Search result 4

    Category Number 10
    Pack size 50 mg
    Substance name 4-amino-6-chlorobenzene-1,3-disulfonamide
    CAS Number 121-30-2
    Quantitative No
    Current batch 2149
    QTY (Max 25)

  • Search result 5

    Category Number 74
    Pack size 25 mg
    Substance name 4-chloro-5-sulfamoylanthranilic acid
    CAS Number 3086-91-7
    Quantitative No
    Current batch 3767
    QTY (Max 25)

  • Search result 6

    Category Number 604
    Pack size 1
    Substance name 4-chlorobenzylphthalazinone
    CAS Number Not applicable
    Quantitative Not applicable
    Current batch
    Discontinued

  • Search result 7

    Category Number 195
    Pack size 25 mg
    Substance name 4-dimethylamino-3-methyl-1,2-diphenylbutan-2-ol hydrochloride
    CAS Number 2214-28-0
    Quantitative No
    Current batch 2645
    QTY (Max 25)

  • Search result 8

    Category Number 1130
    Pack size 50 mg
    Substance name 4-dodecylresorcinol
    CAS Number 24305-56-4
    Quantitative No
    Current batch 3616
    Discontinued

  • Search result 9

    Category Number 71
    Pack size 25 mg
    Substance name 4-[2-(5-chloro-2-methoxybenzamido)ethyl]benzenesulfonamide
    CAS Number 16673-34-0
    Quantitative No
    Current batch 4161
    QTY (Max 25)

  • Search result 10

    Category Number 359
    Pack size 1
    Substance name 5-(6-methoxy-2-naphthyl)-3-methylcyclohexan-1-one
    CAS Number Not applicable
    Quantitative Not applicable
    Current batch
    Discontinued

  • Search result 11

    Category Number 965
    Pack size 100 mg
    Substance name 5-chloro-1-methyl-4-nitroimidazole
    CAS Number 4897-25-0
    Quantitative No
    Current batch 4252
    QTY (Max 25)

  • Search result 12

    Category Number 378
    Pack size 50 mg
    Substance name 5-chloro-2-methylaminobenzophenone
    CAS Number 1022-13-5
    Quantitative No
    Current batch 3758
    QTY (Max 25)

  • Search result 13

    Category Number 1078
    Pack size 25 mg
    Substance name 5-methoxytryptamine
    CAS Number 608-07-1
    Quantitative No
    Current batch 3395
    QTY (Max 5)

  • Search result 14

    Category Number 564
    Pack size 25 mg
    Substance name 5-vinyl-2-pyrrolidone
    CAS Number 7529-16-0
    Quantitative No
    Current batch 3593
    QTY (Max 25)

  • Search result 15

    Category Number 196
    Pack size 50 mg
    Substance name 5-[1-hydroxy-2-(1-methyl-3-phenylpropylamino)ethyl] salicylic acid hydrochloride
    CAS Number 1391051-99-2 (free base)
    Quantitative No
    Current batch 4186
    QTY (Max 25)

  • Search result 16

    Category Number 582
    Pack size 1
    Substance name 6,6'-dimethoxy-2,2'-binaphthyl
    CAS Number Not applicable
    Quantitative Not applicable
    Current batch
    Discontinued

  • Search result 17

    Category Number 443
    Pack size 25 mg
    Substance name 6-(2-chlorophenyl)-2,4-dihydro-2-[(dimethylamino)methylene]8-nitroimidazo[1,2-a][1,4]benzodiazepin-1-one
    CAS Number Not applicable
    Quantitative No
    Current batch 1509
    QTY (Max 25)

  • Search result 18

    Category Number 442
    Pack size 25 mg
    Substance name 6-chloro-1,4-dihydro-1-methyl-4-phenylquinazolin-4-ol
    CAS Number 52395-03-6
    Quantitative No
    Current batch 3810
    QTY (Max 2)

  • Search result 19

    Category Number 376
    Pack size 50 mg
    Substance name 6-chloro-4-(2-chlorophenyl)quinazoline-2-carboxaldehyde
    CAS Number 93955-15-8
    Quantitative No
    Current batch 4462
    QTY (Max 25)

  • Search result 20

    Category Number 871
    Pack size 50 mg
    Substance name 6-epidoxycycline hydrochloride
    CAS Number 41411-66-9
    Quantitative No
    Current batch 3914
    Discontinued