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 874
    Pack size 100 mg
    Substance name loratadine
    CAS Number 79794-75-5
    Quantitative Yes
    Current batch 3117
    QTY (Max 25)

  • Search result 2

    Category Number 875
    Pack size 25 mg
    Substance name loratadine impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 3291
    QTY (Max 25)

  • Search result 3

    Category Number 434
    Pack size 100 mg
    Substance name lorazepam
    CAS Number 846-49-1
    Quantitative Yes
    Current batch 4150
    QTY (Max 25)

  • Search result 4

    Category Number 528
    Pack size 100 mg
    Substance name lormetazepam
    CAS Number 848-75-9
    Quantitative Yes
    Current batch 3200
    QTY (Max 5)

  • Search result 5

    Category Number 867
    Pack size 150 mg
    Substance name losartan potassium
    CAS Number 124750-99-8
    Quantitative Yes
    Current batch 3089
    QTY (Max 25)

  • Search result 6

    Category Number 218
    Pack size 100 mg
    Substance name lymecycline
    CAS Number 992-21-2
    Quantitative No
    Current batch 4228
    QTY (Max 10)

  • Search result 7

    Category Number 776
    Pack size 25 mg
    Substance name lynestrenol
    CAS Number 52-76-6
    Quantitative No
    Current batch 2910
    QTY (Max 25)

  • Search result 8

    Category Number 1007
    Pack size 1200 mg
    Substance name mannitol
    CAS Number 69-65-8
    Quantitative No
    Current batch 3963
    QTY (Max 25)

  • Search result 9

    Category Number 1306
    Pack size 100mg
    Substance name marbofloxacin
    CAS Number 115550-35-1
    Quantitative Yes
    Current batch 4766
    QTY (Max 25)

  • Search result 10

    Category Number 1008
    Pack size 100 mg
    Substance name mebendazole
    CAS Number 31431-39-7
    Quantitative No
    Current batch 4246
    QTY (Max 25)

  • Search result 11

    Category Number 1271
    Pack size 100 mg
    Substance name mebeverine hydrochloride
    CAS Number Not applicable
    Quantitative Yes
    Current batch 4521
    QTY (Max 25)

  • Search result 12

    Category Number 1273
    Pack size 1ml
    Substance name mebeverine impurity C
    CAS Number Not applicable
    Quantitative No
    Current batch 4562
    QTY (Max 25)

  • Search result 13

    Category Number 1272
    Pack size 25mg
    Substance name mebeverine impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4524
    QTY (Max 25)

  • Search result 14

    Category Number 220
    Pack size 100 mg
    Substance name meclozine hydrochloride
    CAS Number 1104-22-9
    Quantitative No
    Current batch 3329
    QTY (Max 25)

  • Search result 15

    Category Number 221
    Pack size 100 mg
    Substance name medroxyprogesterone acetate
    CAS Number 71-58-9
    Quantitative Yes
    Current batch 4566
    QTY (Max 25)

  • Search result 16

    Category Number 222
    Pack size 25 mg
    Substance name megestrol
    CAS Number 3562-63-8
    Quantitative No
    Current batch 3748
    QTY (Max 25)

  • Search result 17

    Category Number 223
    Pack size 100 mg
    Substance name megestrol acetate
    CAS Number 595-33-5
    Quantitative Yes
    Current batch 3544
    QTY (Max 25)

  • Search result 18

    Category Number 1077
    Pack size 100 mg
    Substance name melatonin
    CAS Number 73-31-4
    Quantitative Yes
    Current batch 3994
    QTY (Max 25)

  • Search result 19

    Category Number 1151
    Pack size 25 mg
    Substance name melitracen hydrochloride
    CAS Number 10563-70-9
    Quantitative No
    Current batch 3760
    QTY (Max 25)

  • Search result 20

    Category Number 629
    Pack size 100 mg
    Substance name meloxicam
    CAS Number 71125-38-7
    Quantitative Yes
    Current batch 4198
    QTY (Max 25)

  • Search result 21

    Category Number 630
    Pack size 100 mg
    Substance name meloxicam impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4483
    QTY (Max 25)

  • Search result 22

    Category Number 391
    Pack size 100 mg
    Substance name melphalan
    CAS Number 148-82-3
    Quantitative Yes
    Current batch 3327
    QTY (Max 25)

  • Search result 23

    Category Number 699
    Pack size 100 mg
    Substance name mepivacaine hydrochloride
    CAS Number 1722-62-9
    Quantitative Yes
    Current batch 4202
    QTY (Max 25)

  • Search result 24

    Category Number 583
    Pack size 100 mg
    Substance name meptazinol hydrochloride
    CAS Number 59263-76-2
    Quantitative Yes
    Current batch 3747
    QTY (Max 25)

  • Search result 25

    Category Number 773
    Pack size 100 mg
    Substance name mercaptopurine
    CAS Number 6112-76-1
    Quantitative Yes
    Current batch 2937
    QTY (Max 25)

  • Search result 26

    Category Number 762
    Pack size 25 mg
    Substance name mercaptopurine impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 2902
    QTY (Max 25)

  • Search result 27

    Category Number 1075
    Pack size 125 mg
    Substance name mesalazine
    CAS Number 89-57-6
    Quantitative Yes
    Current batch 3391
    QTY (Max 25)

  • Search result 28

    Category Number 496
    Pack size 50 mg
    Substance name mesoridazine besilate
    CAS Number 32672-69-8
    Quantitative No
    Current batch 1767
    Discontinued

  • Search result 29

    Category Number 911
    Pack size 25 mg
    Substance name metacycline hydrochloride
    CAS Number 3963-95-9
    Quantitative No
    Current batch 3807
    Out of Stock

  • Search result 30

    Category Number 226
    Pack size 100 mg
    Substance name metaraminol tartrate
    CAS Number 33402-03-8
    Quantitative No
    Current batch 4381
    QTY (Max 25)

  • Search result 31

    Category Number 1296
    Pack size 10mg
    Substance name metformin for system suitability
    CAS Number Not applicable
    Quantitative No
    Current batch 4708
    QTY (Max 25)

  • Search result 32

    Category Number 227
    Pack size 100 mg
    Substance name metformin hydrochloride
    CAS Number 1115-70-4
    Quantitative Yes
    Current batch 4642
    QTY (Max 25)

  • Search result 33

    Category Number 1295
    Pack size 10 mg
    Substance name metformin impurity D
    CAS Number Not applicable
    Quantitative No
    Current batch 4610
    QTY (Max 25)

  • Search result 34

    Category Number 552
    Pack size 100 mg
    Substance name methadone hydrochloride
    CAS Number 1095-90-5
    Quantitative Yes
    Current batch 4448
    QTY (Max 25)

  • Search result 35

    Category Number 920
    Pack size 10 mg
    Substance name methyl 3, 5-diamino-6-chloropyrazine-2-carboxylate
    CAS Number 1458-01-1
    Quantitative No
    Current batch 3360
    QTY (Max 25)

  • Search result 36

    Category Number 237
    Pack size 25 mg
    Substance name methyl N-4[2-(5-chloro-2-methoxybenzamido)ethyl]benzenesulfonylcarbamate
    CAS Number 21165-77-5
    Quantitative No
    Current batch 3515
    QTY (Max 25)

  • Search result 37

    Category Number 644
    Pack size 25 mg
    Substance name methyl-4-acetamido-2-hydroxybenzoate
    CAS Number 4093-28-1
    Quantitative No
    Current batch 2150
    QTY (Max 25)

  • Search result 38

    Category Number 240
    Pack size 100 mg
    Substance name methyldopa
    CAS Number 555-30-6
    Quantitative Yes
    Current batch 3034
    QTY (Max 25)

  • Search result 39

    Category Number 241
    Pack size 100 mg
    Substance name methyldopate hydrochloride
    CAS Number 2508-79-4
    Quantitative Yes
    Current batch 2513
    QTY (Max 25)

  • Search result 40

    Category Number 1201
    Pack size 100 mg
    Substance name methylphenidate hydrochloride
    CAS Number 298-59-9
    Quantitative Yes
    Current batch 4013
    QTY (Max 25)