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

  • Search result 2

    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 3

    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 4

    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 5

    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 6

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

  • Search result 7

    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 8

    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 9

    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 10

    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 11

    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 12

    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 13

    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 14

    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 15

    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 16

    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 17

    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 18

    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 19

    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 20

    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 21

    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 22

    Category Number 773
    Pack size 100 mg
    Substance name mercaptopurine
    CAS Number 6112-76-1
    Quantitative Yes
    Current batch 4365
    QTY (Max 1)

  • Search result 23

    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 24

    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 25

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

  • Search result 26

    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 27

    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 28

    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 29

    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 30

    Category Number 1295
    Pack size 10 mg
    Substance name metformin impurity D
    CAS Number Not applicable
    Quantitative No
    Current batch 4610
    Out of Stock

  • Search result 31

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

  • Search result 32

    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 33

    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 34

    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 35

    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 36

    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 37

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

  • Search result 38

    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 39

    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 40

    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 41

    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 42

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

  • Search result 43

    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 44

    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 45

    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 46

    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 47

    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 48

    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 49

    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 50

    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 51

    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 52

    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 53

    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 54

    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 55

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

  • Search result 56

    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 57

    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 58

    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 59

    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 60

    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 61

    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 62

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

  • Search result 63

    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 64

    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 65

    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 66

    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 67

    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 68

    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 69

    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 70

    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
    Out of Stock

  • Search result 71

    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 72

    Category Number 889
    Pack size 10 mg
    Substance name N-demethylerythromycin A
    CAS Number 992-62-1
    Quantitative No
    Current batch 3198
    QTY (Max 25)

  • Search result 73

    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 74

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

  • Search result 75

    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 4091
    Out of Stock

  • Search result 76

    Category Number 641
    Pack size 30 mg
    Substance name N-methyl-N'-(2,4-xylyl)formamidine
    CAS Number 22664-55-7
    Quantitative No
    Current batch 3464
    Out of Stock

  • Search result 77

    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 78

    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 79

    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 80

    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 81

    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 82

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

  • Search result 83

    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 84

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

  • Search result 85

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

  • Search result 86

    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 87

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

  • Search result 88

    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 89

    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 90

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

  • Search result 91

    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 92

    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 93

    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 94

    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 95

    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 96

    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 97

    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 98

    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 99

    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 100

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