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
    Out of Stock

  • 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)

  • Search result 41

    Category Number 384
    Pack size 25 mg
    Substance name N1,N2-diquinoxalin-2-ylsulfanilamide
    CAS Number Not applicable
    Quantitative No
    Current batch 1455
    QTY (Max 25)

  • Search result 42

    Category Number 358
    Pack size 200 mg
    Substance name nabumetone
    CAS Number 42924-53-8
    Quantitative Yes
    Current batch 4218
    QTY (Max 25)

  • Search result 43

    Category Number 851
    Pack size 10 mg
    Substance name nabumetone impurity D
    CAS Number 127053-22-9
    Quantitative No
    Current batch 2991
    QTY (Max 25)

  • Search result 44

    Category Number 1256
    Pack size 100 mg
    Substance name nadolol
    CAS Number 42200-33-9
    Quantitative Yes
    Current batch 4263
    QTY (Max 25)

  • Search result 45

    Category Number 362
    Pack size 100 mg
    Substance name naftidrofuryl oxalate
    CAS Number 474972
    Quantitative Yes
    Current batch 4837
    QTY (Max 10)

  • Search result 46

    Category Number 548
    Pack size 100 mg
    Substance name naloxone hydrochloride
    CAS Number 357-08-4
    Quantitative Yes
    Current batch 4451
    QTY (Max 25)

  • Search result 47

    Category Number 257
    Pack size 100 mg
    Substance name nandrolone
    CAS Number 434-22-0
    Quantitative Yes
    Current batch 4050
    Discontinued

  • Search result 48

    Category Number 425
    Pack size 50 mg
    Substance name nandrolone decanoate
    CAS Number 360-70-3
    Quantitative No
    Current batch 2501
    Discontinued

  • Search result 49

    Category Number 259
    Pack size 50 mg
    Substance name nandrolone laurate
    CAS Number 26490-31-3
    Quantitative No
    Current batch 2709
    QTY (Max 25)

  • Search result 50

    Category Number 260
    Pack size 100 mg
    Substance name nandrolone phenylpropionate
    CAS Number 62-90-8
    Quantitative Yes
    Current batch 2683
    Discontinued

  • Search result 51

    Category Number 435
    Pack size 100 mg
    Substance name naproxen
    CAS Number 22204-53-1
    Quantitative Yes
    Current batch 4618
    QTY (Max 25)

  • Search result 52

    Category Number 1260
    Pack size 50 mg
    Substance name naproxen impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4463
    QTY (Max 25)

  • Search result 53

    Category Number 1270
    Pack size 200 mg
    Substance name nevirapine
    CAS Number Not applicable
    Quantitative Yes
    Current batch 4488
    QTY (Max 25)

  • Search result 54

    Category Number 1103
    Pack size 100 mg
    Substance name nicorandil
    CAS Number 65141-46-0
    Quantitative Yes
    Current batch 3506
    QTY (Max 25)

  • Search result 55

    Category Number 1106
    Pack size 10 mg
    Substance name nicorandil amide
    CAS Number 6265-73-2
    Quantitative No
    Current batch 3509
    QTY (Max 25)

  • Search result 56

    Category Number 1237
    Pack size 25 mg
    Substance name nicorandil impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4303
    QTY (Max 25)

  • Search result 57

    Category Number 1105
    Pack size 10 mg
    Substance name nicorandil nitrate
    CAS Number 65141-58-4
    Quantitative No
    Current batch 3508
    QTY (Max 25)

  • Search result 58

    Category Number 460
    Pack size 100 mg
    Substance name nicotinamide
    CAS Number 98-92-0
    Quantitative Yes
    Current batch 4224
    QTY (Max 10)

  • Search result 59

    Category Number 821
    Pack size 100 mg
    Substance name nicotine ditartrate dihydrate
    CAS Number 6019-06-3
    Quantitative Yes
    Current batch 3751
    QTY (Max 25)

  • Search result 60

    Category Number 822
    Pack size 25 mg
    Substance name nicotine impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 3867
    QTY (Max 25)

  • Search result 61

    Category Number 395
    Pack size 50 mg
    Substance name nicotinyl alcohol tartrate
    CAS Number Not applicable
    Quantitative No
    Current batch 1430
    QTY (Max 25)

  • Search result 62

    Category Number 462
    Pack size 100 mg
    Substance name nifedipine
    CAS Number 21829-25-4
    Quantitative Yes
    Current batch 2997
    QTY (Max 1)

  • Search result 63

    Category Number 651
    Pack size 100 mg
    Substance name nimodipine
    CAS Number 66085-59-4
    Quantitative Yes
    Current batch 3695
    QTY (Max 25)

  • Search result 64

    Category Number 943
    Pack size 2 mL
    Substance name nimodipine impurity A
    CAS Number 85677-93-6
    Quantitative No
    Current batch 4245
    QTY (Max 2)

  • Search result 65

    Category Number 262
    Pack size 100 mg
    Substance name nitrazepam
    CAS Number 146-22-5
    Quantitative Yes
    Current batch 4588
    QTY (Max 25)

  • Search result 66

    Category Number 263
    Pack size 50 mg
    Substance name nitrofurfural diacetate
    CAS Number 92-55-7
    Quantitative No
    Current batch 597
    QTY (Max 25)

  • Search result 67

    Category Number 512
    Pack size 100 mg
    Substance name noradrenaline acid tartrate
    CAS Number 108341-18-0
    Quantitative Yes
    Current batch 4307
    QTY (Max 25)

  • Search result 68

    Category Number 266
    Pack size 50 mg
    Substance name norethisterone
    CAS Number 68-22-4
    Quantitative Yes
    Current batch 4164
    QTY (Max 25)

  • Search result 69

    Category Number 267
    Pack size 100 mg
    Substance name norethisterone acetate
    CAS Number 51-98-9
    Quantitative Yes
    Current batch 2744
    QTY (Max 25)

  • Search result 70

    Category Number 670
    Pack size 100 mg
    Substance name norfloxacin
    CAS Number 70458-96-7
    Quantitative Yes
    Current batch 3096
    QTY (Max 25)

  • Search result 71

    Category Number 714
    Pack size 100 mg
    Substance name norgestrel
    CAS Number 6533-00-2
    Quantitative Yes
    Current batch 3522
    QTY (Max 10)

  • Search result 72

    Category Number 269
    Pack size 200 mg
    Substance name nortriptyline hydrochloride
    CAS Number 894-71-3
    Quantitative Yes
    Current batch 4257
    QTY (Max 25)

  • Search result 73

    Category Number 1288
    Pack size 100 mg
    Substance name ofloxacin
    CAS Number Not applicable
    Quantitative Yes
    Current batch 4600
    QTY (Max 25)

  • Search result 74

    Category Number 1060
    Pack size 100 mg
    Substance name olanzapine
    CAS Number 132539-06-1
    Quantitative Yes
    Current batch 3245
    QTY (Max 1)

  • Search result 75

    Category Number 1173
    Pack size 100 mg
    Substance name olmesartan medoxomil
    CAS Number 144689-63-4
    Quantitative Yes
    Current batch 3802
    QTY (Max 25)

  • Search result 76

    Category Number 765
    Pack size 100 mg
    Substance name omeprazole
    CAS Number 73590-58-6
    Quantitative Yes
    Current batch 4311
    QTY (Max 25)

  • Search result 77

    Category Number 1297
    Pack size 10mg
    Substance name omeprazole impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4875
    QTY (Max 25)

  • Search result 78

    Category Number 805
    Pack size 25 mg
    Substance name ondansetron for TLC system suitability
    CAS Number Not applicable
    Quantitative No
    Current batch 4353
    QTY (Max 25)

  • Search result 79

    Category Number 808
    Pack size 100 mg
    Substance name ondansetron hydrochloride dihydrate
    CAS Number 103639-04-9
    Quantitative Yes
    Current batch 2897
    QTY (Max 1)

  • Search result 80

    Category Number 806
    Pack size 25 mg
    Substance name ondansetron impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4379
    QTY (Max 25)