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.

30/06/2025

Dear valued customer,

We are writing to let you know that, due to an electrical fault, our freezers in which some BPCRS vial stock was stored switched off for a short period and the storage temperature may have been compromised over the weekend of 21st/22nd June. This was detected promptly and rectified, but as a precaution we have removed all affected items from sale and are conducting thorough testing to verify their stability and usability.

Consequently, you may notice in the short term that a higher number of products than usual are showing as “out of stock”. This process is necessary to ensure that only products that meet our quality standards are shipped to you.

We sincerely apologise for any inconvenience and appreciate your patience and understanding, and would like to reassure you that;

· None of the affected vials have been shipped to customers.

· All affected vials have been quarantined.

· We are urgently reviewing the material stability data and carrying out testing to determine if the material has been affected.

· We have additional bulk supplies of the materials which have not been affected and we can produce more vials from these bulks.

Products will be brought back into stock as soon as we can confirm they have not been affected. As we assess the products and gather more data we will be able to update with estimated timeframes in due course. As soon as we have further information we will update this page.

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  • Search result 1

    Category Number 349
    Pack size 50 mg
    Substance name tylosin
    Declared content Not applicable
    Current batch 1226
    QTY (Max 2)
  • Search result 2

    Category Number 350
    Pack size 1 g
    Substance name urea
    Declared content
    99.7% of CH4N2O
    Current batch 4123
    QTY (Max 25)
  • Search result 3

    Category Number 706
    Pack size 150 mg
    Substance name ursodeoxycholic acid
    Declared content
    99.7% of C24H40O4
    Current batch 4497
    QTY (Max 25)
  • Search result 4

    Category Number 1142
    Pack size 50 mg
    Substance name ursodeoxycholic acid impurity standard
    Declared content Not applicable
    Current batch 4878
    QTY (Max 25)
  • Search result 5

    Category Number 1194
    Pack size 100 mg
    Substance name valaciclovir hydrochloride
    Declared content
    96.4% of C13H20N6O4,HCl
    86.6% of C13H20N6O4
    Current batch 3893
    QTY (Max 25)
  • Search result 6

    Category Number 1195
    Pack size 10 mg
    Substance name valaciclovir impurity standard
    Declared content Not applicable
    Current batch 4733
    QTY (Max 25)
  • Search result 7

    Category Number 1161
    Pack size 100 mg
    Substance name valsartan
    Declared content
    98.3% of C24H29N5O3
    Current batch 3794
    QTY (Max 25)
  • Search result 8

    Category Number 1167
    Pack size 100 mg
    Substance name vecuronium bromide
    Declared content
    96.5 % of C34H57BrN2O4
    Current batch 4808
    QTY (Max 25)
  • Search result 9

    Category Number 835
    Pack size 100 mg
    Substance name venlafaxine hydrochloride
    Declared content
    99.8% of C17H27NO2, HCl
    Current batch 3841
    QTY (Max 1)
  • Search result 10

    Category Number 836
    Pack size 25 mg
    Substance name venlafaxine impurity standard
    Declared content Not applicable
    Current batch 4177
    QTY (Max 25)
  • Search result 11

    Category Number 720
    Pack size 100 mg
    Substance name verapamil hydrochloride
    Declared content
    99.7% of C27H38N2O4,HCl
    Current batch 3910
    QTY (Max 25)
  • Search result 12

    Category Number 563
    Pack size 150 mg
    Substance name vigabatrin
    Declared content
    99+P363.3% of C6H11NO2
    Current batch 3057
    QTY (Max 25)
  • Search result 13

    Category Number 672
    Pack size 100 mg
    Substance name warfarin
    Declared content
    99.4% of C19H16O4
    Current batch 4340
    QTY (Max 25)
  • Search result 14

    Category Number 353
    Pack size 100 mg
    Substance name xylometazoline hydrochloride
    Declared content
    99.9% of C16H24N2,HCl
    Current batch 3451
    QTY (Max 25)
  • Search result 15

    Category Number 346
    Pack size 50 mg
    Substance name z-triprolidine hydrochloride
    Declared content Not applicable
    Current batch 4592
    Out of Stock
  • Search result 16

    Category Number 803
    Pack size 150 mg
    Substance name zidovudine
    Declared content
    99.3% of C10H13N5O4
    Current batch 2870
    QTY (Max 2)
  • Search result 17

    Category Number 850
    Pack size 50 mg
    Substance name zidovudine and lamivudine impurity standard
    Declared content Not applicable
    Current batch 4387
    QTY (Max 25)
  • Search result 18

    Category Number 895
    Pack size 25 mg
    Substance name zidovudine impurity standard
    Declared content Not applicable
    Current batch 3214
    QTY (Max 25)
  • Search result 19

    Category Number 1065
    Pack size 25 mg
    Substance name zolpidem impurity A
    Declared content Not applicable
    Current batch 4740
    QTY (Max 25)
  • Search result 20

    Category Number 1063
    Pack size 100 mg
    Substance name zolpidem tartrate
    Declared content
    97.3% of C42H48N6O8
    Current batch 4755
    QTY (Max 5)
  • Search result 21

    Category Number 812
    Pack size 100 mg
    Substance name zopiclone
    Declared content
    99.80%
    Current batch 4382
    QTY (Max 10)
  • Search result 22

    Category Number 599
    Pack size 100 mg
    Substance name zuclopenthixol acetate dihydrochloride
    Declared content
    85.8% of C24H27ClN2O2S
    Current batch 3066
    QTY (Max 25)
  • Search result 23

    Category Number 596
    Pack size 100 mg
    Substance name zuclopenthixol decanoate dihydrochloride
    Declared content
    99.7% of C32H43ClN2O2S,2HCl
    Current batch 3065
    QTY (Max 25)
  • Search result 24

    Category Number 558
    Pack size 100 mg
    Substance name zuclopenthixol hydrochloride
    Declared content
    82.7% of C22H25ClN2OS
    Current batch 3064
    QTY (Max 25)
  • Search result 25

    Category Number 882
    Pack size 200 mg
    Substance name α-tocopherol
    Declared content Not applicable
    Current batch 3129
    Out of Stock