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 788
    Pack size 500 mg
    Substance name ergocalciferol
    CAS Number 50-14-6
    Quantitative Yes
    Current batch 4439
    QTY (Max 25)

  • Search result 2

    Category Number 405
    Pack size 100 mg
    Substance name ergometrine maleate
    CAS Number 129-51-1
    Quantitative Yes
    Current batch 4545
    QTY (Max 5)

  • Search result 3

    Category Number 141
    Pack size 200 mg
    Substance name ergotamine tartrate
    CAS Number 379-79-3
    Quantitative Yes
    Current batch 3892
    Discontinued

  • Search result 4

    Category Number 781
    Pack size 100 mg
    Substance name erythromycin
    CAS Number 114-07-8
    Quantitative Yes
    Current batch 4800
    QTY (Max 10)

  • Search result 5

    Category Number 794
    Pack size 250 mg
    Substance name erythromycin A
    CAS Number 114-07-8
    Quantitative Yes
    Current batch 2879
    Discontinued

  • Search result 6

    Category Number 795
    Pack size 50 mg
    Substance name erythromycin B
    CAS Number Not applicable
    Quantitative Yes
    Current batch 2880
    Discontinued

  • Search result 7

    Category Number 796
    Pack size 50 mg
    Substance name erythromycin C
    CAS Number Not applicable
    Quantitative Yes
    Current batch 2881
    Discontinued

  • Search result 8

    Category Number 790
    Pack size 100 mg
    Substance name erythromycin estolate
    CAS Number 3521-62-8
    Quantitative No
    Current batch 2860
    QTY (Max 25)

  • Search result 9

    Category Number 798
    Pack size 50 mg
    Substance name erythromycin ethyl succinate
    CAS Number 1264-62-6
    Quantitative No
    Current batch 2842
    QTY (Max 25)

  • Search result 10

    Category Number 488
    Pack size 100 mg
    Substance name erythromycin stearate
    CAS Number 643-22-1
    Quantitative Yes
    Current batch 3430
    QTY (Max 1)

  • Search result 11

    Category Number 396
    Pack size 50 mg
    Substance name estradiol benzoate
    CAS Number 50-50-0
    Quantitative Yes
    Current batch 2370
    QTY (Max 25)

  • Search result 12

    Category Number 729
    Pack size 100 mg
    Substance name estradiol hemihydrate
    CAS Number 35380-71-3
    Quantitative Yes
    Current batch 3408
    QTY (Max 25)

  • Search result 13

    Category Number 142
    Pack size 25 mg
    Substance name estramustine
    CAS Number 2998-57-4
    Quantitative No
    Current batch 2815
    Discontinued

  • Search result 14

    Category Number 752
    Pack size 100 mg
    Substance name estriol
    CAS Number 50-27-1
    Quantitative Yes
    Current batch 4724
    QTY (Max 25)

  • Search result 15

    Category Number 753
    Pack size 25 mg
    Substance name estriol impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4743
    QTY (Max 10)

  • Search result 16

    Category Number 860
    Pack size 25 mg
    Substance name estrone
    CAS Number 53-16-7
    Quantitative No
    Current batch 3004
    QTY (Max 25)

  • Search result 17

    Category Number 616
    Pack size 100 mg
    Substance name estropipate
    CAS Number 7280-37-7
    Quantitative Yes
    Current batch 2069
    QTY (Max 25)

  • Search result 18

    Category Number 143
    Pack size 100 mg
    Substance name etacrynic acid
    CAS Number 58-54-8
    Quantitative Yes
    Current batch 1549
    Discontinued

  • Search result 19

    Category Number 1212
    Pack size 100 mg
    Substance name ethambutol hydrochloride
    CAS Number 1070-11-7
    Quantitative Yes
    Current batch 4627
    QTY (Max 25)

  • Search result 20

    Category Number 421
    Pack size 100 mg
    Substance name ethinylestradiol
    CAS Number 57-63-6
    Quantitative Yes
    Current batch 4427
    QTY (Max 10)

  • Search result 21

    Category Number 145
    Pack size 100 mg
    Substance name ethopabate
    CAS Number 59-06-3
    Quantitative Yes
    Current batch 2611
    QTY (Max 25)

  • Search result 22

    Category Number 146
    Pack size 200 mg
    Substance name ethosuximide
    CAS Number 77-67-8
    Quantitative Yes
    Current batch 3456
    QTY (Max 25)

  • Search result 23

    Category Number 149
    Pack size 25 mg
    Substance name ethyl meclofenamate
    CAS Number Not applicable
    Quantitative No
    Current batch 1265
    Discontinued

  • Search result 24

    Category Number 150
    Pack size 1
    Substance name ethyldimethyl [2-(2-methylbenzhydryloxy)ethyl]ammonium chloride
    CAS Number Not applicable
    Quantitative Not applicable
    Current batch
    Discontinued

  • Search result 25

    Category Number 529
    Pack size 150 mg
    Substance name etodolac
    CAS Number 41340-25-4
    Quantitative Yes
    Current batch 4282
    QTY (Max 25)

  • Search result 26

    Category Number 541
    Pack size 10 mg
    Substance name etodolac 1-methyl analogue
    CAS Number 109518-50-5
    Quantitative No
    Current batch 4076
    QTY (Max 25)

  • Search result 27

    Category Number 542
    Pack size 10 mg
    Substance name etodolac 8-methyl analogue
    CAS Number 41340-19-6
    Quantitative No
    Current batch 3247
    QTY (Max 25)

  • Search result 28

    Category Number 533
    Pack size 10 mg
    Substance name etodolac acid dimer
    CAS Number Not applicable
    Quantitative No
    Current batch 3229
    Out of Stock

  • Search result 29

    Category Number 885
    Pack size 150 mg
    Substance name etoposide
    CAS Number 33419-42-0
    Quantitative Yes
    Current batch 4829
    QTY (Max 25)

  • Search result 30

    Category Number 1131
    Pack size 100 mg
    Substance name etynodiol diacetate
    CAS Number 297-76-7
    Quantitative Yes
    Current batch 4051
    E-mail to order:  bpcrs@mhra.gov.uk

  • Search result 31

    Category Number 653
    Pack size 100 mg
    Substance name famotidine
    CAS Number 76824-35-6
    Quantitative Yes
    Current batch 3088
    QTY (Max 25)

  • Search result 32

    Category Number 655
    Pack size 25 mg
    Substance name famotidine degradation impurity 1
    CAS Number 107880-74-0
    Quantitative No
    Current batch 3936
    QTY (Max 25)

  • Search result 33

    Category Number 656
    Pack size 25 mg
    Substance name famotidine degradation impurity 2
    CAS Number 76824-16-3
    Quantitative No
    Current batch 3068
    Discontinued

  • Search result 34

    Category Number 654
    Pack size 25 mg
    Substance name famotidine impurity C
    CAS Number 106433-44-7
    Quantitative No
    Current batch 3799
    QTY (Max 25)

  • Search result 35

    Category Number 620
    Pack size 100 mg
    Substance name felbinac
    CAS Number 5728-52-9
    Quantitative Yes
    Current batch 4395
    QTY (Max 25)

  • Search result 36

    Category Number 777
    Pack size 100 mg
    Substance name felodipine
    CAS Number 72509-76-3
    Quantitative Yes
    Current batch 2825
    QTY (Max 25)

  • Search result 37

    Category Number 758
    Pack size 20 mg
    Substance name felodipine impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 2856
    QTY (Max 25)

  • Search result 38

    Category Number 692
    Pack size 100 mg
    Substance name fenbendazole
    CAS Number 43210-67-9
    Quantitative Yes
    Current batch 3808
    QTY (Max 2)

  • Search result 39

    Category Number 693
    Pack size 25 mg
    Substance name fenbendazole impurity 1
    CAS Number 53065-28-4
    Quantitative No
    Current batch 4621
    QTY (Max 25)

  • Search result 40

    Category Number 354
    Pack size 100 mg
    Substance name fenbufen
    CAS Number 36330-85-5
    Quantitative Yes
    Current batch 1871
    QTY (Max 25)

  • Search result 41

    Category Number 1280
    Pack size 100mg
    Substance name fenofibrate
    CAS Number Not applicable
    Quantitative Yes
    Current batch 4596
    QTY (Max 25)

  • Search result 42

    Category Number 661
    Pack size 25 mg
    Substance name fenoterol degradation impurity A
    CAS Number Not applicable
    Quantitative No
    Current batch 3744
    Discontinued

  • Search result 43

    Category Number 660
    Pack size 100 mg
    Substance name fenoterol hydrobromide
    CAS Number 1944-12-3
    Quantitative Yes
    Current batch 3879
    Discontinued

  • Search result 44

    Category Number 665
    Pack size 100 mg
    Substance name fentanyl citrate
    CAS Number 990-73-8
    Quantitative Yes
    Current batch 4391
    QTY (Max 5)

  • Search result 45

    Category Number 666
    Pack size 25 mg
    Substance name fentanyl impurity A
    CAS Number 85893-37-4
    Quantitative No
    Current batch 4321
    Discontinued

  • Search result 46

    Category Number 156
    Pack size 0.25 mL
    Substance name fenthion
    CAS Number 55-38-9
    Quantitative Yes
    Current batch 2679
    Discontinued

  • Search result 47

    Category Number 1095
    Pack size 100 mg
    Substance name fexofenadine hydrochloride
    CAS Number 153439-40-8
    Quantitative Yes
    Current batch 3476
    QTY (Max 25)

  • Search result 48

    Category Number 1096
    Pack size 25 mg
    Substance name fexofenadine impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 3679
    QTY (Max 25)

  • Search result 49

    Category Number 740
    Pack size 100 mg
    Substance name finasteride
    CAS Number 98319-26-7
    Quantitative Yes
    Current batch 2559
    QTY (Max 25)

  • Search result 50

    Category Number 571
    Pack size 100 mg
    Substance name flavoxate hydrochloride
    CAS Number 3717-88-2
    Quantitative Yes
    Current batch 2263
    QTY (Max 2)

  • Search result 51

    Category Number 676
    Pack size 100 mg
    Substance name flecainide acetate
    CAS Number 54143-56-5
    Quantitative Yes
    Current batch 4492
    QTY (Max 25)

  • Search result 52

    Category Number 158
    Pack size 250 mg
    Substance name flucloxacillin sodium
    CAS Number 1847-24-1
    Quantitative Yes
    Current batch 4735
    QTY (Max 25)

  • Search result 53

    Category Number 1174
    Pack size 100 mg
    Substance name fluconazole
    CAS Number 86386-73-4
    Quantitative Yes
    Current batch 4290
    QTY (Max 25)

  • Search result 54

    Category Number 1175
    Pack size 50 mg
    Substance name fluconazole impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4888
    QTY (Max 1)

  • Search result 55

    Category Number 1321
    Pack size 100mg
    Substance name fludarabine phosphate
    CAS Number 75607-67-9
    Quantitative Yes
    Current batch 4844
    QTY (Max 25)

  • Search result 56

    Category Number 159
    Pack size 50 mg
    Substance name fludrocortisone acetate
    CAS Number 514-36-3
    Quantitative Yes
    Current batch 3842
    QTY (Max 25)

  • Search result 57

    Category Number 1156
    Pack size 100 mg
    Substance name flumetasone pivalate
    CAS Number 2002-29-1
    Quantitative Yes
    Current batch 3827
    QTY (Max 25)

  • Search result 58

    Category Number 840
    Pack size 25 mg
    Substance name flunitrazepam
    CAS Number 1622-62-4
    Quantitative No
    Current batch 2980
    QTY (Max 25)

  • Search result 59

    Category Number 160
    Pack size 50 mg
    Substance name fluocinolone acetonide
    CAS Number 67-73-2
    Quantitative Yes
    Current batch 3996
    QTY (Max 25)

  • Search result 60

    Category Number 489
    Pack size 100 mg
    Substance name fluocinonide
    CAS Number 356-12-7
    Quantitative Yes
    Current batch 1730
    QTY (Max 2)

  • Search result 61

    Category Number 161
    Pack size 50 mg
    Substance name fluocortolone hexanoate
    CAS Number 303-40-2
    Quantitative Yes
    Current batch 2111
    Discontinued

  • Search result 62

    Category Number 162
    Pack size 50 mg
    Substance name fluocortolone pivalate
    CAS Number 29205-06-9
    Quantitative Yes
    Current batch 1610
    Discontinued

  • Search result 63

    Category Number 573
    Pack size 100 mg
    Substance name fluorometholone
    CAS Number 426-13-1
    Quantitative Yes
    Current batch 3009
    QTY (Max 25)

  • Search result 64

    Category Number 995
    Pack size 40 mg
    Substance name fluorouracil
    CAS Number 51-21-8
    Quantitative No
    Current batch 3246
    QTY (Max 25)

  • Search result 65

    Category Number 797
    Pack size 250 mg
    Substance name fluoxetine hydrochloride
    CAS Number 56296-78-7
    Quantitative Yes
    Current batch 4832
    QTY (Max 25)

  • Search result 66

    Category Number 164
    Pack size 50 mg
    Substance name fluoxymesterone
    CAS Number 76-43-7
    Quantitative No
    Current batch 2995
    QTY (Max 25)

  • Search result 67

    Category Number 554
    Pack size 100 mg
    Substance name flupentixol decanoate dihydrochloride
    CAS Number 30909-51-4
    Quantitative Yes
    Current batch 3084
    QTY (Max 25)

  • Search result 68

    Category Number 1132
    Pack size 100 mg
    Substance name flupentixol dihydrochloride
    CAS Number 2413-38-9
    Quantitative Yes
    Current batch 4727
    QTY (Max 25)

  • Search result 69

    Category Number 167
    Pack size 100 mg
    Substance name fluphenazine hydrochloride
    CAS Number 146-56-5
    Quantitative Yes
    Current batch 3749
    QTY (Max 25)

  • Search result 70

    Category Number 574
    Pack size 100 mg
    Substance name flurbiprofen sodium
    CAS Number 56767-76-1
    Quantitative Yes
    Current batch 4060
    QTY (Max 1)

  • Search result 71

    Category Number 587
    Pack size 100 mg
    Substance name fluticasone propionate
    CAS Number 80474-14-2
    Quantitative Yes
    Current batch 4030
    QTY (Max 25)

  • Search result 72

    Category Number 588
    Pack size 25 mg
    Substance name fluticasone S-methyl impurity
    CAS Number 73205-13-7
    Quantitative No
    Current batch 3322
    Discontinued

  • Search result 73

    Category Number 1189
    Pack size 25 mg
    Substance name fluvastatin impurity F
    CAS Number 1207963-21-0
    Quantitative No
    Current batch 4589
    QTY (Max 25)

  • Search result 74

    Category Number 1163
    Pack size 100 mg
    Substance name fluvastatin sodium
    CAS Number 93957-55-2
    Quantitative Yes
    Current batch 4581
    QTY (Max 25)

  • Search result 75

    Category Number 1190
    Pack size 25 mg
    Substance name fluvoxamine impurity D
    CAS Number 61718-80-7
    Quantitative No
    Current batch 3912
    QTY (Max 25)

  • Search result 76

    Category Number 600
    Pack size 100 mg
    Substance name fluvoxamine maleate
    CAS Number 61718-82-9
    Quantitative Yes
    Current batch 2680
    QTY (Max 1)

  • Search result 77

    Category Number 671
    Pack size 100 mg
    Substance name fluvoxamine maleate impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 3099
    QTY (Max 25)

  • Search result 78

    Category Number 937
    Pack size 150 mg
    Substance name folic acid
    CAS Number 59-30-3
    Quantitative Yes
    Current batch 3282
    QTY (Max 25)

  • Search result 79

    Category Number 639
    Pack size 25 mg
    Substance name form-2',4'-xylidide
    CAS Number 60397-77-5
    Quantitative No
    Current batch 3426
    QTY (Max 25)

  • Search result 80

    Category Number 1129
    Pack size 25 mg
    Substance name formononetin
    CAS Number 485-72-3
    Quantitative No
    Current batch 3668
    E-mail to order:  bpcrs@mhra.gov.uk

  • Search result 81

    Category Number 997
    Pack size 10 mg
    Substance name foscarnet impurity B
    CAS Number 55920-24-6
    Quantitative No
    Current batch 3248
    QTY (Max 25)

  • Search result 82

    Category Number 623
    Pack size 100 mg
    Substance name foscarnet sodium
    CAS Number 34156-56-4
    Quantitative Yes
    Current batch 4255
    QTY (Max 25)

  • Search result 83

    Category Number 678
    Pack size 50 mg
    Substance name fosfestrol sodium
    CAS Number 4719-75-9
    Quantitative No
    Current batch 2254
    Discontinued

  • Search result 84

    Category Number 1162
    Pack size 10 mg
    Substance name fosinopril impurity 1
    CAS Number 83623-61-4
    Quantitative No
    Current batch 3689
    QTY (Max 25)

  • Search result 85

    Category Number 1092
    Pack size 25 mg
    Substance name fosinopril impurity A
    CAS Number 95399-71-6
    Quantitative No
    Current batch 3448
    QTY (Max 25)

  • Search result 86

    Category Number 1091
    Pack size 100 mg
    Substance name fosinopril sodium
    CAS Number 88889-14-9
    Quantitative Yes
    Current batch 3447
    QTY (Max 25)

  • Search result 87

    Category Number 172
    Pack size 1
    Substance name furazolidone
    CAS Number 67-45-8
    Quantitative Not applicable
    Current batch
    Discontinued

  • Search result 88

    Category Number 547
    Pack size 100 mg
    Substance name furosemide
    CAS Number 54-31-9
    Quantitative Yes
    Current batch 4360
    QTY (Max 25)

  • Search result 89

    Category Number 1111
    Pack size 100 mg
    Substance name galantamine hydrobromide
    CAS Number 1953-04-4
    Quantitative Yes
    Current batch 3901
    QTY (Max 25)

  • Search result 90

    Category Number 1214
    Pack size 25 mg
    Substance name galantamine hydrobromide impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4080
    QTY (Max 25)

  • Search result 91

    Category Number 643
    Pack size 1
    Substance name gallamine impurity standard
    CAS Number Not applicable
    Quantitative Not applicable
    Current batch
    Discontinued

  • Search result 92

    Category Number 363
    Pack size 100 mg
    Substance name gemfibrozil
    CAS Number 25812-30-0
    Quantitative Yes
    Current batch 2968
    QTY (Max 25)

  • Search result 93

    Category Number 303
    Pack size 10 mg
    Substance name gemfibrozil impurity E
    CAS Number 500904-61-0
    Quantitative No
    Current batch 3541
    QTY (Max 25)

  • Search result 94

    Category Number 365
    Pack size 100 mg
    Substance name gemfibrozil methyl ester
    CAS Number 149105-25-9
    Quantitative No
    Current batch 3707
    QTY (Max 25)

  • Search result 95

    Category Number 174
    Pack size 25 mg
    Substance name gentamicin sulfate
    CAS Number 1405-41-0
    Quantitative No
    Current batch 2898
    QTY (Max 25)

  • Search result 96

    Category Number 175
    Pack size 100 mg
    Substance name glibenclamide
    CAS Number 10238-21-8
    Quantitative Yes
    Current batch 4231
    QTY (Max 25)

  • Search result 97

    Category Number 368
    Pack size 200 mg
    Substance name gliclazide
    CAS Number 21187-98-4
    Quantitative Yes
    Current batch 4424
    QTY (Max 25)

  • Search result 98

    Category Number 1304
    Pack size 10mg
    Substance name gliclazide impurity A
    CAS Number Not applicable
    Quantitative No
    Current batch 4756
    QTY (Max 25)

  • Search result 99

    Category Number 366
    Pack size 30 mg
    Substance name gliclazide impurity F
    CAS Number 1076198-18-9
    Quantitative No
    Current batch 4190
    QTY (Max 25)

  • Search result 100

    Category Number 1144
    Pack size 100 mg
    Substance name glimepiride
    CAS Number 93479-97-1
    Quantitative Yes
    Current batch 3596
    QTY (Max 25)