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 943
    Pack size 2 mL
    Substance name nimodipine impurity A
    Declared content Not applicable
    Current batch 4245
    QTY (Max 5)
  • Search result 2

    Category Number 262
    Pack size 100 mg
    Substance name nitrazepam
    Declared content
    100.0% of C15H11N3O3
    Current batch 4588
    Out of Stock
  • Search result 3

    Category Number 263
    Pack size 50 mg
    Substance name nitrofurfural diacetate
    Declared content Not applicable
    Current batch 597
    QTY (Max 25)
  • Search result 4

    Category Number 512
    Pack size 100 mg
    Substance name noradrenaline acid tartrate
    Declared content
    99.3% of C8H11NO3,C4H6O6,H2O
    Current batch 4307
    QTY (Max 25)
  • Search result 5

    Category Number 266
    Pack size 50 mg
    Substance name norethisterone
    Declared content
    98.4% of C20H26O2
    Current batch 4164
    QTY (Max 25)
  • Search result 6

    Category Number 267
    Pack size 100 mg
    Substance name norethisterone acetate
    Declared content
    99.4% of C22H28O3
    Current batch 2744
    QTY (Max 25)
  • Search result 7

    Category Number 670
    Pack size 100 mg
    Substance name norfloxacin
    Declared content
    99.3% of C16H18FN3O3
    Current batch 3096
    QTY (Max 25)
  • Search result 8

    Category Number 714
    Pack size 100 mg
    Substance name norgestrel
    Declared content
    99.8% of C21H28O2
    Current batch 3522
    QTY (Max 10)
  • Search result 9

    Category Number 269
    Pack size 200 mg
    Substance name nortriptyline hydrochloride
    Declared content
    87.8% of C19H21N
    Current batch 4257
    QTY (Max 25)
  • Search result 10

    Category Number 1288
    Pack size 100 mg
    Substance name ofloxacin
    Declared content
    99.3% of C18H20FN3O4
    Current batch 4600
    QTY (Max 25)
  • Search result 11

    Category Number 1060
    Pack size 100 mg
    Substance name olanzapine
    Declared content
    99.7% of C17H20N4S
    Current batch 3245
    QTY (Max 1)
  • Search result 12

    Category Number 1173
    Pack size 100 mg
    Substance name olmesartan medoxomil
    Declared content
    99.7 % of C29H30N6O6
    Current batch 3802
    QTY (Max 25)
  • Search result 13

    Category Number 765
    Pack size 100 mg
    Substance name omeprazole
    Declared content
    99.9 % of C17H19N3O3S
    Current batch 4311
    QTY (Max 25)
  • Search result 14

    Category Number 1297
    Pack size 10mg
    Substance name omeprazole impurity standard
    Declared content Not applicable
    Current batch 4875
    QTY (Max 5)
  • Search result 15

    Category Number 805
    Pack size 25 mg
    Substance name ondansetron for TLC system suitability
    Declared content Not applicable
    Current batch 4353
    QTY (Max 25)
  • Search result 16

    Category Number 808
    Pack size 100 mg
    Substance name ondansetron hydrochloride dihydrate
    Declared content
    80.4% of C18H19N3O
    Current batch 2897
    QTY (Max 2)
  • Search result 17

    Category Number 806
    Pack size 25 mg
    Substance name ondansetron impurity standard
    Declared content Not applicable
    Current batch 4379
    QTY (Max 25)
  • Search result 18

    Category Number 272
    Pack size 1
    Substance name orciprenaline sulfate
    Declared content Not applicable
    Current batch
    Discontinued
  • Search result 19

    Category Number 903
    Pack size 100 mg
    Substance name oseltamivir phosphate
    Declared content
    99.7% of C16H31N2O8P
    Current batch 3236
    QTY (Max 25)
  • Search result 20

    Category Number 1021
    Pack size 50 mg
    Substance name oxazepam
    Declared content Not applicable
    Current batch 3223
    Out of Stock
  • Search result 21

    Category Number 764
    Pack size 25 mg
    Substance name oxibendazole
    Declared content Not applicable
    Current batch 2945
    QTY (Max 25)
  • Search result 22

    Category Number 700
    Pack size 100 mg
    Substance name oxybuprocaine hydrochloride
    Declared content
    99.8% of C17H28N2O3,HCl
    Current batch 3804
    QTY (Max 25)
  • Search result 23

    Category Number 701
    Pack size 100 mg
    Substance name oxybutynin hydrochloride
    Declared content
    97.6% of C22H31NO3,HCl
    Current batch 3921
    QTY (Max 25)
  • Search result 24

    Category Number 273
    Pack size 200 mg
    Substance name oxyclozanide
    Declared content Not applicable
    Current batch 4016
    QTY (Max 1)
  • Search result 25

    Category Number 1068
    Pack size 100 mg
    Substance name oxycodone hydrochloride
    Declared content
    93.8% of C18H21NO4, HCl
    Current batch 4211
    Out of Stock