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 381
    Pack size 1 mg
    Substance name desmopressin
    CAS Number 16679-58-6
    Quantitative Yes
    Current batch 3905
    QTY (Max 25)

  • Search result 2

    Category Number 1188
    Pack size 1 mg
    Substance name desmopressin impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 3906
    QTY (Max 25)

  • Search result 3

    Category Number 568
    Pack size 100 mg
    Substance name desogestrel
    CAS Number 54024-22-5
    Quantitative Yes
    Current batch 4331
    QTY (Max 25)

  • Search result 4

    Category Number 816
    Pack size 25 mg
    Substance name desogestrel impurity D
    CAS Number 54048-10-1
    Quantitative No
    Current batch 4059
    QTY (Max 2)

  • Search result 5

    Category Number 817
    Pack size 25 mg
    Substance name desogestrel impurity E
    CAS Number 70805-85-5
    Quantitative No
    Current batch 4476
    QTY (Max 25)

  • Search result 6

    Category Number 594
    Pack size 1
    Substance name desogestrel Δ3-isomer
    CAS Number Not applicable
    Quantitative Not applicable
    Current batch
    Discontinued

  • Search result 7

    Category Number 578
    Pack size 100 mg
    Substance name dexamethasone
    CAS Number 50-02-2
    Quantitative Yes
    Current batch 4287
    QTY (Max 25)

  • Search result 8

    Category Number 811
    Pack size 25 mg
    Substance name dexamethasone impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 2970
    QTY (Max 25)

  • Search result 9

    Category Number 646
    Pack size 100 mg
    Substance name dexamethasone phosphate
    CAS Number 312-93-6
    Quantitative Yes
    Current batch 3634
    Discontinued

  • Search result 10

    Category Number 108
    Pack size 100 mg
    Substance name dexamethasone sodium phosphate
    CAS Number 2392-39-4
    Quantitative Yes
    Current batch 4205
    QTY (Max 25)

  • Search result 11

    Category Number 465
    Pack size 100 mg
    Substance name dextropropoxyphene hydrochloride
    CAS Number 1639-60-7
    Quantitative Yes
    Current batch 2246
    QTY (Max 25)

  • Search result 12

    Category Number 549
    Pack size 200 mg
    Substance name diacetylfluorescein
    CAS Number 596-09-8
    Quantitative Yes
    Current batch 3997
    QTY (Max 1)

  • Search result 13

    Category Number 887
    Pack size 150 mg
    Substance name diamorphine hydrochloride
    CAS Number 1502-95-0
    Quantitative Yes
    Current batch 3174
    QTY (Max 25)

  • Search result 14

    Category Number 111
    Pack size 100 mg
    Substance name diazepam
    CAS Number 439-14-5
    Quantitative No
    Current batch 4587
    QTY (Max 25)

  • Search result 15

    Category Number 858
    Pack size 100 mg
    Substance name dibenzosuberone
    CAS Number 1210-35-1
    Quantitative No
    Current batch 3006
    QTY (Max 25)

  • Search result 16

    Category Number 114
    Pack size 25 mg
    Substance name dibenzo[b,e]thiepin-11(6H)-one
    CAS Number 1531-77-7
    Quantitative No
    Current batch 3040
    QTY (Max 25)

  • Search result 17

    Category Number 116
    Pack size 100 mg
    Substance name dichlorophen
    CAS Number 97-23-4
    Quantitative Yes
    Current batch 1661
    Discontinued

  • Search result 18

    Category Number 420
    Pack size 100 mg
    Substance name dichlorophen impurity standard
    CAS Number Not applicable
    Quantitative Yes
    Current batch 1858
    QTY (Max 25)

  • Search result 19

    Category Number 598
    Pack size 100 mg
    Substance name diclofenac diethylamine
    CAS Number 78213-16-8
    Quantitative No
    Current batch 4399
    QTY (Max 25)

  • Search result 20

    Category Number 828
    Pack size 25 mg
    Substance name diclofenac impurity A
    CAS Number 15362-40-0
    Quantitative No
    Current batch 3918
    QTY (Max 10)

  • Search result 21

    Category Number 619
    Pack size 100 mg
    Substance name diclofenac sodium
    CAS Number 15307-79-6
    Quantitative Yes
    Current batch 4601
    QTY (Max 25)

  • Search result 22

    Category Number 810
    Pack size 250 mg
    Substance name dicloxacillin sodium
    CAS Number 13412-64-1
    Quantitative No
    Current batch 3428
    QTY (Max 25)

  • Search result 23

    Category Number 989
    Pack size 100 mg
    Substance name dicycloverine hydrochloride
    CAS Number 67-92-5
    Quantitative No
    Current batch 3452
    QTY (Max 25)

  • Search result 24

    Category Number 118
    Pack size 100 mg
    Substance name diethanolamine fusidate
    CAS Number 16391-75-6
    Quantitative Yes
    Current batch 4732
    QTY (Max 10)

  • Search result 25

    Category Number 119
    Pack size 50 mg
    Substance name diethyl-4-decyloxy-3-ethoxyanilino-methylenemalonate
    CAS Number 26692-07-9
    Quantitative No
    Current batch 811
    QTY (Max 1)

  • Search result 26

    Category Number 737
    Pack size 100 mg
    Substance name diethylcarbamazine citrate
    CAS Number 1642-54-2
    Quantitative Yes
    Current batch 2571
    QTY (Max 25)

  • Search result 27

    Category Number 859
    Pack size 100 mg
    Substance name diethylstilbestrol
    CAS Number 56-53-1
    Quantitative Yes
    Current batch 3019
    QTY (Max 25)

  • Search result 28

    Category Number 677
    Pack size 25 mg
    Substance name diethylstilbestrol monophosphate
    CAS Number Not applicable
    Quantitative No
    Current batch 2253
    Discontinued

  • Search result 29

    Category Number 401
    Pack size 100 mg
    Substance name diflucortolone valerate
    CAS Number 59198-70-8
    Quantitative Yes
    Current batch 3496
    QTY (Max 25)

  • Search result 30

    Category Number 397
    Pack size 25 mg
    Substance name diflucortolone valerate impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 1886
    Discontinued

  • Search result 31

    Category Number 855
    Pack size 250 mg
    Substance name digitoxin
    CAS Number 71-63-6
    Quantitative Yes
    Current batch 3913
    QTY (Max 25)

  • Search result 32

    Category Number 431
    Pack size 100 mg
    Substance name dihydrocodeine tartrate
    CAS Number 5965-13-9
    Quantitative Yes
    Current batch 4873
    QTY (Max 25)

  • Search result 33

    Category Number 120
    Pack size 25 mg
    Substance name dihydroergocristine mesilate
    CAS Number 24730-10-7
    Quantitative No
    Current batch 2620
    Discontinued

  • Search result 34

    Category Number 726
    Pack size 100 mg
    Substance name diltiazem hydrochloride
    CAS Number 33286-22-5
    Quantitative Yes
    Current batch 3220
    QTY (Max 25)

  • Search result 35

    Category Number 899
    Pack size 25 mg
    Substance name diltiazem impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 3358
    QTY (Max 25)

  • Search result 36

    Category Number 865
    Pack size 25 mg
    Substance name dimethyl-2,6-dimethyl-4-(2-nitrophenyl)pyridine-3,5-dicarboxylate
    CAS Number 67035-22-7
    Quantitative No
    Current batch 3071
    QTY (Max 25)

  • Search result 37

    Category Number 866
    Pack size 25 mg
    Substance name dimethyl-2,6-dimethyl-4-(2-nitrosophenyl)pyridine-3,5-dicarboxylate
    CAS Number 50428-14-3
    Quantitative No
    Current batch 3072
    QTY (Max 25)

  • Search result 38

    Category Number 511
    Pack size 25 mg
    Substance name dimethyl{5-[2-(1-methylamino-2-nitrovinylamino)ethylsulfinylmethyl]furfuryl}amine
    CAS Number 73851-70-4
    Quantitative No
    Current batch 4069
    QTY (Max 25)

  • Search result 39

    Category Number 690
    Pack size 100 mg
    Substance name dimpylate
    CAS Number 333-41-5
    Quantitative Yes
    Current batch 4731
    QTY (Max 5)

  • Search result 40

    Category Number 691
    Pack size 100 mg
    Substance name dimpylate for chromatography
    CAS Number 333-41-5
    Quantitative No
    Current batch 4375
    QTY (Max 1)

  • Search result 41

    Category Number 902
    Pack size 100 mg
    Substance name dinoprostone
    CAS Number 363-24-6
    Quantitative Yes
    Current batch 3328
    Discontinued

  • Search result 42

    Category Number 896
    Pack size 100 mg
    Substance name diphenhydramine hydrochloride
    CAS Number 147-24-0
    Quantitative Yes
    Current batch 3764
    QTY (Max 25)

  • Search result 43

    Category Number 1119
    Pack size 25 mg
    Substance name diphenylmethanol
    CAS Number 91-01-0
    Quantitative No
    Current batch 3574
    QTY (Max 25)

  • Search result 44

    Category Number 128
    Pack size 100 mg
    Substance name dipipanone hydrochloride
    CAS Number 75783-06-1
    Quantitative Yes
    Current batch 1402
    Discontinued

  • Search result 45

    Category Number 673
    Pack size 100 mg
    Substance name dipivefrine hydrochloride
    CAS Number 64019-93-8
    Quantitative Yes
    Current batch 2268
    QTY (Max 25)

  • Search result 46

    Category Number 659
    Pack size 100 mg
    Substance name dipivefrine impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 2315
    E-mail to order:  bpcrs@mhra.gov.uk

  • Search result 47

    Category Number 589
    Pack size 100 mg
    Substance name diprenorphine
    CAS Number 14357-78-9
    Quantitative Yes
    Current batch 3547
    Discontinued

  • Search result 48

    Category Number 131
    Pack size 100 mg
    Substance name dipyridamole
    CAS Number 58-32-2
    Quantitative Yes
    Current batch 3374
    QTY (Max 25)

  • Search result 49

    Category Number 1102
    Pack size 25 mg
    Substance name dipyridamole impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 3697
    QTY (Max 25)

  • Search result 50

    Category Number 1224
    Pack size 100 mg
    Substance name disodium edetate
    CAS Number 6381-92-6
    Quantitative Yes
    Current batch 4067
    QTY (Max 25)

  • Search result 51

    Category Number 577
    Pack size 1
    Substance name disodium ethoxyphosphinatoformate
    CAS Number Not applicable
    Quantitative Not applicable
    Current batch
    Discontinued

  • Search result 52

    Category Number 615
    Pack size 100 mg
    Substance name disodium pamidronate
    CAS Number 57248-88-1
    Quantitative Yes
    Current batch 4869
    QTY (Max 25)

  • Search result 53

    Category Number 132
    Pack size 50 mg
    Substance name disulfiram
    CAS Number 97-77-8
    Quantitative Yes
    Current batch 3277
    QTY (Max 25)

  • Search result 54

    Category Number 385
    Pack size 100 mg
    Substance name dithranol
    CAS Number 1143-38-0
    Quantitative Yes
    Current batch 2932
    QTY (Max 25)

  • Search result 55

    Category Number 386
    Pack size 50 mg
    Substance name dithranol dimer
    CAS Number 31991-54-5
    Quantitative No
    Current batch 2986
    QTY (Max 25)

  • Search result 56

    Category Number 674
    Pack size 100 mg
    Substance name dobutamine hydrochloride
    CAS Number 49745-95-1
    Quantitative Yes
    Current batch 3728
    QTY (Max 25)

  • Search result 57

    Category Number 133
    Pack size 200 mg
    Substance name docusate sodium
    CAS Number 577-11-7
    Quantitative Yes
    Current batch 4585
    QTY (Max 25)

  • Search result 58

    Category Number 669
    Pack size 100 mg
    Substance name domperidone maleate
    CAS Number 83898-65-1
    Quantitative Yes
    Current batch 4273
    QTY (Max 25)

  • Search result 59

    Category Number 1291
    Pack size 100mg
    Substance name donepezil hydrochloride
    CAS Number Not applicable
    Quantitative Yes
    Current batch 4604
    QTY (Max 25)

  • Search result 60

    Category Number 1292
    Pack size 10mg
    Substance name donepezil impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4703
    QTY (Max 25)

  • Search result 61

    Category Number 468
    Pack size 100 mg
    Substance name dopamine hydrochloride
    CAS Number 62-31-7
    Quantitative Yes
    Current batch 3542
    QTY (Max 25)

  • Search result 62

    Category Number 1069
    Pack size 100 mg
    Substance name dorzolamide hydrochloride
    CAS Number 130693-82-2
    Quantitative Yes
    Current batch 4722
    QTY (Max 25)

  • Search result 63

    Category Number 1070
    Pack size 25 mg
    Substance name dorzolamide impurity B
    CAS Number 120279-37-0
    Quantitative No
    Current batch 4569
    QTY (Max 25)

  • Search result 64

    Category Number 1071
    Pack size 25 mg
    Substance name dorzolamide impurity D
    CAS Number 164455-27-0
    Quantitative No
    Current batch 4312
    QTY (Max 25)

  • Search result 65

    Category Number 134
    Pack size 100 mg
    Substance name dosulepin hydrochloride
    CAS Number 897-15-4
    Quantitative Yes
    Current batch 4786
    QTY (Max 25)

  • Search result 66

    Category Number 135
    Pack size 100 mg
    Substance name doxapram hydrochloride
    CAS Number 7081-53-0
    Quantitative Yes
    Current batch 4227
    QTY (Max 25)

  • Search result 67

    Category Number 1301
    Pack size 10mg
    Substance name doxazosin impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4775
    QTY (Max 25)

  • Search result 68

    Category Number 1300
    Pack size 100mg
    Substance name doxazosin mesilate
    CAS Number Not applicable
    Quantitative Yes
    Current batch 4753
    QTY (Max 25)

  • Search result 69

    Category Number 136
    Pack size 100 mg
    Substance name doxepin hydrochloride
    CAS Number 1229-29-4
    Quantitative Yes
    Current batch 4160
    QTY (Max 25)

  • Search result 70

    Category Number 823
    Pack size 25 mg
    Substance name doxepin impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4049
    QTY (Max 25)

  • Search result 71

    Category Number 990
    Pack size 100 mg
    Substance name doxorubicin hydrochloride
    CAS Number 25316-40-9
    Quantitative Yes
    Current batch 3285
    QTY (Max 25)

  • Search result 72

    Category Number 780
    Pack size 100 mg
    Substance name doxycycline hyclate
    CAS Number 24390-14-5
    Quantitative Yes
    Current batch 4127
    QTY (Max 25)

  • Search result 73

    Category Number 675
    Pack size 100 mg
    Substance name droperidol
    CAS Number 548-73-2
    Quantitative Yes
    Current batch 3429
    QTY (Max 25)

  • Search result 74

    Category Number 1289
    Pack size 100mg
    Substance name duloxetine hydrochloride
    CAS Number Not applicable
    Quantitative Yes
    Current batch 4605
    QTY (Max 25)

  • Search result 75

    Category Number 1290
    Pack size 10mg
    Substance name duloxetine impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 4693
    QTY (Max 25)

  • Search result 76

    Category Number 138
    Pack size 50 mg
    Substance name dydrogesterone
    CAS Number 152-62-5
    Quantitative No
    Current batch 2801
    Discontinued

  • Search result 77

    Category Number 139
    Pack size 100 mg
    Substance name econazole nitrate
    CAS Number 24169-02-6
    Quantitative Yes
    Current batch 4208
    QTY (Max 25)

  • Search result 78

    Category Number 743
    Pack size 20 mg
    Substance name enalapril diketopiperazine
    CAS Number 115729-52-7
    Quantitative No
    Current batch 4286
    QTY (Max 25)

  • Search result 79

    Category Number 741
    Pack size 100 mg
    Substance name enalapril maleate
    CAS Number 76095-16-4
    Quantitative Yes
    Current batch 2673
    QTY (Max 1)

  • Search result 80

    Category Number 742
    Pack size 20 mg
    Substance name enalaprilat
    CAS Number 84680-54-6
    Quantitative No
    Current batch 3090
    QTY (Max 25)