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.

951 items
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  • Search result 1

    Category Number 641
    Pack size 30 mg
    Substance name N-methyl-N'-(2,4-xylyl)formamidine
    Declared content Not applicable
    Current batch 3464
    Out of Stock
  • Search result 2

    Category Number 756
    Pack size 25 mg
    Substance name N-p-chlorobenzoyltyramine
    Declared content Not applicable
    Current batch 2752
    QTY (Max 25)
  • Search result 3

    Category Number 384
    Pack size 25 mg
    Substance name N1,N2-diquinoxalin-2-ylsulfanilamide
    Declared content Not applicable
    Current batch 1455
    QTY (Max 25)
  • Search result 4

    Category Number 358
    Pack size 200 mg
    Substance name nabumetone
    Declared content
    99.8 % of C15H16O2
    Current batch 4218
    QTY (Max 25)
  • Search result 5

    Category Number 851
    Pack size 10 mg
    Substance name nabumetone impurity D
    Declared content Not applicable
    Current batch 2991
    QTY (Max 25)
  • Search result 6

    Category Number 1256
    Pack size 100 mg
    Substance name nadolol
    Declared content
    99.7% of C17H27NO4
    Current batch 4263
    QTY (Max 25)
  • Search result 7

    Category Number 362
    Pack size 100 mg
    Substance name naftidrofuryl oxalate
    Declared content
    99.4% of C26H35NO7
    Current batch 4837
    QTY (Max 5)
  • Search result 8

    Category Number 548
    Pack size 100 mg
    Substance name naloxone hydrochloride
    Declared content
    90.6 % of C19H21NO4,HCl
    Current batch 4451
    QTY (Max 25)
  • Search result 9

    Category Number 257
    Pack size 100 mg
    Substance name nandrolone
    Declared content
    100.0% of C18H26O2
    Current batch 4050
    Discontinued
  • Search result 10

    Category Number 425
    Pack size 50 mg
    Substance name nandrolone decanoate
    Declared content Not applicable
    Current batch 2501
    Discontinued
  • Search result 11

    Category Number 259
    Pack size 50 mg
    Substance name nandrolone laurate
    Declared content Not applicable
    Current batch 2709
    Out of Stock
  • Search result 12

    Category Number 260
    Pack size 100 mg
    Substance name nandrolone phenylpropionate
    Declared content
    100.0% of C27H34O3
    Current batch 2683
    Discontinued
  • Search result 13

    Category Number 435
    Pack size 100 mg
    Substance name naproxen
    Declared content
    99.8% of C14H14O3
    Current batch 4618
    QTY (Max 25)
  • Search result 14

    Category Number 1260
    Pack size 50 mg
    Substance name naproxen impurity standard
    Declared content Not applicable
    Current batch 4463
    QTY (Max 25)
  • Search result 15

    Category Number 1270
    Pack size 200 mg
    Substance name nevirapine
    Declared content
    99.9 % of C15H14N4O
    Current batch 4488
    QTY (Max 25)
  • Search result 16

    Category Number 1103
    Pack size 100 mg
    Substance name nicorandil
    Declared content
    99.2% of C8H9N3O4
    Current batch 3506
    QTY (Max 25)
  • Search result 17

    Category Number 1106
    Pack size 10 mg
    Substance name nicorandil amide
    Declared content Not applicable
    Current batch 3509
    QTY (Max 25)
  • Search result 18

    Category Number 1237
    Pack size 25 mg
    Substance name nicorandil impurity standard
    Declared content Not applicable
    Current batch 4303
    QTY (Max 25)
  • Search result 19

    Category Number 1105
    Pack size 10 mg
    Substance name nicorandil nitrate
    Declared content Not applicable
    Current batch 3508
    QTY (Max 25)
  • Search result 20

    Category Number 460
    Pack size 100 mg
    Substance name nicotinamide
    Declared content
    99.8% of C6H6N2O
    Current batch 4224
    QTY (Max 10)
  • Search result 21

    Category Number 821
    Pack size 100 mg
    Substance name nicotine ditartrate dihydrate
    Declared content
    32.5% of C10H14N2
    92.6% of C18H26N2O12
    Current batch 3751
    QTY (Max 25)
  • Search result 22

    Category Number 822
    Pack size 25 mg
    Substance name nicotine impurity standard
    Declared content Not applicable
    Current batch 3867
    QTY (Max 25)
  • Search result 23

    Category Number 395
    Pack size 50 mg
    Substance name nicotinyl alcohol tartrate
    Declared content Not applicable
    Current batch 1430
    QTY (Max 25)
  • Search result 24

    Category Number 462
    Pack size 100 mg
    Substance name nifedipine
    Declared content
    99.9% of C17H18N2O6
    Current batch 2997
    QTY (Max 1)
  • Search result 25

    Category Number 651
    Pack size 100 mg
    Substance name nimodipine
    Declared content
    100.0% of C21H26N2O7
    Current batch 3695
    QTY (Max 25)