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

  • Search result 2

    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 3

    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 4

    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 5

    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 6

    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 7

    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 8

    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 9

    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 10

    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)

  • Search result 11

    Category Number 601
    Pack size 25 mg
    Substance name 3-aminopent-4-ene-1,1-dicarboxylic acid
    CAS Number Not applicable
    Quantitative No
    Current batch 1955
    Discontinued

  • Search result 12

    Category Number 607
    Pack size 25 mg
    Substance name 3-dimethylaminopropyl 2-benzylaminobenzoate hydrochloride
    CAS Number 2196185-65-4
    Quantitative No
    Current batch 4313
    QTY (Max 25)

  • Search result 13

    Category Number 627
    Pack size 25 mg
    Substance name 3-formylrifamycin SV
    CAS Number 13292-22-3
    Quantitative No
    Current batch 4289
    QTY (Max 25)

  • Search result 14

    Category Number 239
    Pack size 50 mg
    Substance name 3-methyl-2,2-diphenyl-4-piperidino-butyronitrile
    CAS Number Not applicable
    Quantitative No
    Current batch 600
    E-mail to order:  bpcrs@mhra.gov.uk

  • Search result 15

    Category Number 569
    Pack size 25 mg
    Substance name 3-methylflavone-8-carboxylic acid
    CAS Number 3468-01-7
    Quantitative No
    Current batch 1978
    Discontinued

  • Search result 16

    Category Number 570
    Pack size 25 mg
    Substance name 3-methylflavone-8-carboxylic acid ethyl ester
    CAS Number 35888-94-9
    Quantitative No
    Current batch 1979
    Discontinued

  • Search result 17

    Category Number 367
    Pack size 0.1 mL
    Substance name 3-nitroso-3-azabicyclo[3.3.0]octane
    CAS Number Not applicable
    Quantitative No
    Current batch 2235
    Discontinued

  • Search result 18

    Category Number 450
    Pack size 50 mg
    Substance name 3-piperidylpropiophenone hydrochloride
    CAS Number 886-06-6
    Quantitative No
    Current batch 4481
    QTY (Max 25)

  • Search result 19

    Category Number 499
    Pack size 25 mg
    Substance name 4'-(2-isopropylaminoethyl)methanesulfonanilide hydrochloride
    CAS Number 16974-44-0
    Quantitative No
    Current batch 4183
    QTY (Max 25)

  • Search result 20

    Category Number 163
    Pack size 0.5 mL
    Substance name 4'-fluoro-4-chlorobutyrophenone
    CAS Number Not applicable
    Quantitative No
    Current batch 829
    Discontinued

  • Search result 21

    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 22

    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 23

    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 24

    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 25

    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 26

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

  • Search result 27

    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 28

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

  • Search result 29

    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 30

    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 31

    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 32

    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 33

    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 34

    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 35

    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 36

    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 37

    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 38

    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 39

    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 40

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