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.

07 August 2025

We are pleased to update that products affected by the recent electrical freezer fault are now available following their temporary withdrawal.

This follows a detailed quality assessment of vialled stock and re-vialing product from our reserved bulk supplies.

Thank you again for your patience while we worked to resolve this matter.

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  • Search result 1

    Category Number 47
    Pack size 100 mg
    Substance name bisacodyl
    Declared content
    99.5% of C22H19NO4
    Current batch 2969
    QTY (Max 25)
  • Search result 2

    Category Number 1058
    Pack size 100 mg
    Substance name bisoprolol fumarate
    Declared content
    99.7 % of (C18H31NO4)2,C4H4O4
    Current batch 4378
    QTY (Max 25)
  • Search result 3

    Category Number 1228
    Pack size 1 ml
    Substance name bisoprolol impurity standard
    Declared content Not applicable
    Current batch 4619
    QTY (Max 10)
  • Search result 4

    Category Number 971
    Pack size 25 mg
    Substance name bleomycin sulfate
    Declared content Not applicable
    Current batch 4709
    QTY (Max 25)
  • Search result 5

    Category Number 612
    Pack size 200 mg
    Substance name bretylium tosilate
    Declared content
    97.3% of C18H24BrNO3S
    Current batch 2072
    Discontinued
  • Search result 6

    Category Number 1307
    Pack size 100mg
    Substance name brimonidine Tartrate
    Declared content
    99.4 % ofC15H16BrN5O6
    Current batch 4757
    QTY (Max 25)
  • Search result 7

    Category Number 50
    Pack size 100 mg
    Substance name bromocriptine mesilate
    Declared content
    86.2% of C32H40BrN5O5
    Current batch 3917
    QTY (Max 2)
  • Search result 8

    Category Number 440
    Pack size 50 mg
    Substance name buclizine hydrochloride impurity standard
    Declared content Not applicable
    Current batch 4516
    QTY (Max 25)
  • Search result 9

    Category Number 793
    Pack size 110 mg
    Substance name budesonide
    Declared content
    99.7% of C25H34O6
    Current batch 3816
    QTY (Max 25)
  • Search result 10

    Category Number 894
    Pack size 10 mg
    Substance name budesonide impurity standard
    Declared content Not applicable
    Current batch 4809
    Out of Stock
  • Search result 11

    Category Number 537
    Pack size 100 mg
    Substance name bumetanide
    Declared content
    99.9% of C17H20N2O5S
    Current batch 4116
    QTY (Max 25)
  • Search result 12

    Category Number 479
    Pack size 100 mg
    Substance name bupivacaine hydrochloride
    Declared content
    94.8% of C18H28N2O,HCl
    Current batch 4511
    QTY (Max 25)
  • Search result 13

    Category Number 1062
    Pack size 100 mg
    Substance name buprenorphine hydrochloride
    Declared content
    99.8 % of C29H41NO4,HCl
    Current batch 3310
    Out of Stock
  • Search result 14

    Category Number 403
    Pack size 25 mg
    Substance name busulfan
    Declared content
    100.0% of C6H14O6S2
    Current batch 3937
    QTY (Max 25)
  • Search result 15

    Category Number 766
    Pack size 100 mg
    Substance name caffeine
    Declared content
    99.9% of C8H10N4O2
    Current batch 3271
    QTY (Max 25)
  • Search result 16

    Category Number 355
    Pack size 1 mL
    Substance name calcitonin (salmon)
    Declared content Not applicable
    Current batch
    Discontinued
  • Search result 17

    Category Number 923
    Pack size 100 mg
    Substance name calcium folinate
    Declared content
    75.0 % of C20H21CaN7O7
    Current batch 4508
    QTY (Max 25)
  • Search result 18

    Category Number 1248
    Pack size 100 mg
    Substance name candesartan cilexetil
    Declared content
    99.6% ofC33H34N6O6
    Current batch 4187
    Out of Stock
  • Search result 19

    Category Number 1249
    Pack size 25 mg
    Substance name candesartan cilexetil impurity standard
    Declared content Not applicable
    Current batch 4192
    QTY (Max 25)
  • Search result 20

    Category Number 1229
    Pack size 100 mg
    Substance name capecitabine
    Declared content
    99.9% of C15H22FN3O6
    Current batch 4109
    QTY (Max 25)
  • Search result 21

    Category Number 59
    Pack size 50 mg
    Substance name capreomycin sulfate
    Declared content Not applicable
    Current batch 1216
    Discontinued
  • Search result 22

    Category Number 538
    Pack size 100 mg
    Substance name captopril
    Declared content
    99.6% of C9H15NO3S
    Current batch 3985
    QTY (Max 25)
  • Search result 23

    Category Number 500
    Pack size 25 mg
    Substance name captopril disulfide
    Declared content Not applicable
    Current batch 3203
    Discontinued
  • Search result 24

    Category Number 974
    Pack size 200 mg
    Substance name carbamazepine
    Declared content
    99.9% of C15H12N2O
    Current batch 3240
    QTY (Max 10)
  • Search result 25

    Category Number 523
    Pack size 100 mg
    Substance name carbaryl
    Declared content
    100.0% of C12H11NO2
    Current batch 1833
    QTY (Max 25)