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 662
    Pack size 100 mg
    Substance name methylphenobarbital
    CAS Number 115-38-8
    Quantitative Yes
    Current batch 2265
    QTY (Max 25)

  • Search result 2

    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 3

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

  • Search result 4

    Category Number 233
    Pack size 1
    Substance name methyl[2-(2-methylbenzhydryloxy)ethyl]amine hydrochloride
    CAS Number Not applicable
    Quantitative Not applicable
    Current batch
    Discontinued

  • Search result 5

    Category Number 409
    Pack size 50 mg
    Substance name methysergide maleate
    CAS Number 129-49-7
    Quantitative Yes
    Current batch 1478
    Discontinued

  • Search result 6

    Category Number 642
    Pack size 100 mg
    Substance name metipranolol
    CAS Number 22664-55-7
    Quantitative Yes
    Current batch 2201
    QTY (Max 25)

  • Search result 7

    Category Number 357
    Pack size 100 mg
    Substance name metoclopramide hydrochloride
    CAS Number 54143-57-6
    Quantitative Yes
    Current batch 3792
    QTY (Max 25)

  • Search result 8

    Category Number 540
    Pack size 100 mg
    Substance name metoprolol tartrate
    CAS Number 56392-17-7
    Quantitative Yes
    Current batch 3011
    QTY (Max 25)

  • Search result 9

    Category Number 603
    Pack size 150 mg
    Substance name metronidazole
    CAS Number 443-48-1
    Quantitative Yes
    Current batch 4707
    QTY (Max 25)

  • Search result 10

    Category Number 735
    Pack size 100 mg
    Substance name metronidazole benzoate
    CAS Number 13182-89-3
    Quantitative Yes
    Current batch 3059
    QTY (Max 25)

  • Search result 11

    Category Number 251
    Pack size 100 mg
    Substance name mexenone
    CAS Number 1641-17-4
    Quantitative No
    Current batch 935
    QTY (Max 25)

  • Search result 12

    Category Number 252
    Pack size 100 mg
    Substance name mianserin hydrochloride
    CAS Number 21535-47-7
    Quantitative Yes
    Current batch 3331
    QTY (Max 25)

  • Search result 13

    Category Number 884
    Pack size 25 mg
    Substance name miconazole impurity A
    CAS Number 24155-42-8
    Quantitative No
    Current batch 3138
    QTY (Max 25)

  • Search result 14

    Category Number 253
    Pack size 100 mg
    Substance name miconazole nitrate
    CAS Number 22832-87-7
    Quantitative Yes
    Current batch 2398
    QTY (Max 25)

  • Search result 15

    Category Number 722
    Pack size 100 mg
    Substance name midazolam
    CAS Number 59467-70-8
    Quantitative Yes
    Current batch 4539
    QTY (Max 25)

  • Search result 16

    Category Number 394
    Pack size 125 mg
    Substance name minocycline hydrochloride
    CAS Number 13614-98-7
    Quantitative Yes
    Current batch 4464
    QTY (Max 25)

  • Search result 17

    Category Number 637
    Pack size 100 mg
    Substance name minoxidil
    CAS Number 38304-91-5
    Quantitative Yes
    Current batch 4223
    QTY (Max 25)

  • Search result 18

    Category Number 1313
    Pack size 100mg
    Substance name mirabegron
    CAS Number 223673-61-8
    Quantitative Yes
    Current batch 4830
    QTY (Max 25)

  • Search result 19

    Category Number 842
    Pack size 100 mg
    Substance name mirtazapine
    CAS Number 85650-52-8
    Quantitative Yes
    Current batch 3158
    QTY (Max 25)

  • Search result 20

    Category Number 1253
    Pack size 100 mg
    Substance name modafinil
    CAS Number 68693-11-8
    Quantitative Yes
    Current batch 4275
    QTY (Max 25)

  • Search result 21

    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 22

    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 23

    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 24

    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 25

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

  • Search result 26

    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 27

    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 28

    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 29

    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 30

    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 31

    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 32

    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 33

    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 34

    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 35

    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 36

    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 37

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

  • Search result 38

    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 39

    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
    Out of Stock

  • Search result 40

    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)