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 1170
    Pack size 25 mg
    Substance name ketoconazole impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4591
    QTY (Max 10)

  • Search result 2

    Category Number 668
    Pack size 100 mg
    Substance name ketoprofen
    CAS Number 22071-15-4
    Quantitative Yes
    Current batch 3982
    QTY (Max 25)

  • Search result 3

    Category Number 667
    Pack size 100 mg
    Substance name ketoprofen ethyl ester
    CAS Number 60658-04-0
    Quantitative No
    Current batch 4706
    QTY (Max 25)

  • Search result 4

    Category Number 707
    Pack size 100 mg
    Substance name lacidipine
    CAS Number 103890-78-4
    Quantitative Yes
    Current batch 4302
    QTY (Max 25)

  • Search result 5

    Category Number 647
    Pack size 25 mg
    Substance name lacidipine impurity standard
    CAS Number 103890-78-4
    Quantitative No
    Current batch 3856
    QTY (Max 25)

  • Search result 6

    Category Number 210
    Pack size 3000 mg
    Substance name lactulose
    CAS Number 4618-18-2
    Quantitative Yes
    Current batch 4188
    QTY (Max 25)

  • Search result 7

    Category Number 802
    Pack size 200 mg
    Substance name lamivudine
    CAS Number 134678-17-4
    Quantitative Yes
    Current batch 3878
    QTY (Max 25)

  • Search result 8

    Category Number 857
    Pack size 25 mg
    Substance name lamivudine impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 3533
    QTY (Max 25)

  • Search result 9

    Category Number 1097
    Pack size 200 mg
    Substance name lamotrigine
    CAS Number 84057-84-1
    Quantitative Yes
    Current batch 4083
    QTY (Max 5)

  • Search result 10

    Category Number 1098
    Pack size 25 mg
    Substance name lamotrigine impurity standard
    CAS Number 84057-84-1
    Quantitative No
    Current batch 3594
    QTY (Max 25)

  • Search result 11

    Category Number 872
    Pack size 100 mg
    Substance name lansoprazole
    CAS Number 103577-45-3
    Quantitative Yes
    Current batch 3116
    QTY (Max 25)

  • Search result 12

    Category Number 873
    Pack size 25 mg
    Substance name lansoprazole impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 3188
    QTY (Max 25)

  • Search result 13

    Category Number 1233
    Pack size 100 mg
    Substance name leflunomide
    CAS Number 75706-12-6
    Quantitative Yes
    Current batch 4130
    QTY (Max 25)

  • Search result 14

    Category Number 1234
    Pack size 100 mg
    Substance name letrozole
    CAS Number 112809-51-5
    Quantitative Yes
    Current batch 4131
    QTY (Max 25)

  • Search result 15

    Category Number 212
    Pack size 100 mg
    Substance name levamisole hydrochloride
    CAS Number 16595-80-5
    Quantitative No
    Current batch 4151
    QTY (Max 25)

  • Search result 16

    Category Number 1310
    Pack size 100mg
    Substance name levetiracetam
    CAS Number 102767-28-2
    Quantitative Yes
    Current batch 4821
    QTY (Max 25)

  • Search result 17

    Category Number 1316
    Pack size 25mg
    Substance name levetiracetam impurity C
    CAS Number Not applicable
    Quantitative No
    Current batch 4822
    QTY (Max 25)

  • Search result 18

    Category Number 1315
    Pack size 25mg
    Substance name levetiracetam impurity G
    CAS Number 142-08-5
    Quantitative No
    Current batch 4823
    QTY (Max 25)

  • Search result 19

    Category Number 1311
    Pack size 10mg
    Substance name levetiracetam impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4865
    QTY (Max 25)

  • Search result 20

    Category Number 356
    Pack size 100 mg
    Substance name levobunolol hydrochloride
    CAS Number 27912-14-7
    Quantitative Yes
    Current batch 3402
    QTY (Max 25)

  • Search result 21

    Category Number 213
    Pack size 100 mg
    Substance name levodopa
    CAS Number 59-92-7
    Quantitative Yes
    Current batch 3192
    QTY (Max 25)

  • Search result 22

    Category Number 1287
    Pack size 100 mg
    Substance name levofloxacin hemihydrate
    CAS Number Not applicable
    Quantitative Yes
    Current batch 4599
    QTY (Max 25)

  • Search result 23

    Category Number 772
    Pack size 100 mg
    Substance name levomenthol
    CAS Number 2216-51-5
    Quantitative Yes
    Current batch 4498
    QTY (Max 25)

  • Search result 24

    Category Number 723
    Pack size 100 mg
    Substance name levomepromazine maleate
    CAS Number 7104-38-3
    Quantitative Yes
    Current batch 4026
    QTY (Max 25)

  • Search result 25

    Category Number 634
    Pack size 25 mg
    Substance name levomepromazine sulfoxide
    CAS Number 7606-29-3
    Quantitative No
    Current batch 2865
    QTY (Max 1)

  • Search result 26

    Category Number 501
    Pack size 100 mg
    Substance name levonorgestrel
    CAS Number 797-63-7
    Quantitative Yes
    Current batch 3018
    QTY (Max 1)

  • Search result 27

    Category Number 1284
    Pack size 10 mg
    Substance name levothyroxine sodium impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4571
    QTY (Max 25)

  • Search result 28

    Category Number 727
    Pack size 100 mg
    Substance name lidocaine
    CAS Number 137-58-6
    Quantitative Yes
    Current batch 4401
    QTY (Max 25)

  • Search result 29

    Category Number 214
    Pack size 100 mg
    Substance name lidocaine hydrochloride
    CAS Number 6108-05-0
    Quantitative Yes
    Current batch 4226
    QTY (Max 25)

  • Search result 30

    Category Number 215
    Pack size 250 mg
    Substance name lincomycin hydrochloride
    CAS Number 859-18-7
    Quantitative Yes
    Current batch 2967
    QTY (Max 25)

  • Search result 31

    Category Number 733
    Pack size 0.5 mL
    Substance name linseed oil
    CAS Number 8001-26-1
    Quantitative No
    Current batch 2496
    QTY (Max 25)

  • Search result 32

    Category Number 1285
    Pack size 10 mg
    Substance name liothyronine sodium impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4572
    QTY (Max 25)

  • Search result 33

    Category Number 695
    Pack size 100 mg
    Substance name lisinopril dihydrate
    CAS Number 83915-83-7
    Quantitative Yes
    Current batch 3095
    QTY (Max 25)

  • Search result 34

    Category Number 696
    Pack size 25 mg
    Substance name lisinopril diketopiperazine
    CAS Number 83915-83-7
    Quantitative No
    Current batch 3390
    Discontinued

  • Search result 35

    Category Number 433
    Pack size 100 mg
    Substance name lithium lactate
    CAS Number 867-55-0
    Quantitative Yes
    Current batch 4556
    QTY (Max 25)

  • Search result 36

    Category Number 927
    Pack size 25 mg
    Substance name lithocholic acid
    CAS Number 434-13-9
    Quantitative No
    Current batch 3273
    QTY (Max 25)

  • Search result 37

    Category Number 697
    Pack size 100 mg
    Substance name lofepramine hydrochloride (form A)
    CAS Number 26786-32-3
    Quantitative Yes
    Current batch 4338
    QTY (Max 25)

  • Search result 38

    Category Number 635
    Pack size 100 mg
    Substance name loperamide hydrochloride
    CAS Number 34552-83-5
    Quantitative Yes
    Current batch 4580
    QTY (Max 25)

  • Search result 39

    Category Number 636
    Pack size 25 mg
    Substance name loperamide N-oxide
    CAS Number 106900-12-3
    Quantitative No
    Current batch 4482
    QTY (Max 10)

  • Search result 40

    Category Number 447
    Pack size 50 mg
    Substance name loprazolam mesilate
    CAS Number 52568-80-6
    Quantitative No
    Current batch 1604
    QTY (Max 25)

  • Search result 41

    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 42

    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 43

    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 44

    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 45

    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 46

    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 47

    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 48

    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 49

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

  • Search result 50

    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 51

    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 52

    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 53

    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 54

    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 55

    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 56

    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 57

    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 58

    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 59

    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 60

    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 61

    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 62

    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 63

    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 64

    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 65

    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 66

    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 67

    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 68

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

  • Search result 69

    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 70

    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 71

    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 72

    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 73

    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 74

    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 75

    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 76

    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 77

    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 78

    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 79

    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 80

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