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.

Update 18/07/25

We are pleased to update that over the last three weeks we have made the following products available for sale, following their temporary withdrawal resulting from an electrical fault affecting freezers.

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

CAT 26 (azathioprine), CAT 108 (dexamethasone sodium phosphate), CAT 341 (3,5,6-trichloro-2-hydroxybenzoic acid), CAT 362 (naftidrofuryl oxalate), CAT 400 (rifampicin N-oxide), CAT 640 (N,N'-bis(2,4-xylyl)formamidine), CAT 641 (N-methyl-N'-(2,4-xylyl)formamidine), CAT 654 (famotidine impurity C), CAT 704 (salbutamol ketone impurity), CAT 781 (erythromycin), CAT 789 (demeclocycline hydrochloride), CAT 791 (delta-3-cefaclor), CAT 876 (tamsulosin hydrochloride), CAT 894 (budesonide impurity standard), CAT 1027 (piperacillin), CAT 1030 (pravastatin impurity A), CAT 1106 (nicorandil amide), CAT 1150 (colchicine), CAT 1165 (palmatine chloride), CAT 1167 (vecuronium bromide), CAT 1193 (quinapril hydrochloride).

We are continuing to review all remaining affected products, with further products expected to be made available next week, and most affected items expected to be made available by the end of July.

We would like to thank you again for your patience while we have worked to resolve this matter.

65 items
Sort by and results per page
  • Search result 1

    Category Number 1225
    Pack size 100 mg
    Substance name tamoxifen citrate
    Declared content
    65.8% of C26H29NO
    Current batch 4097
    QTY (Max 25)
  • Search result 2

    Category Number 876
    Pack size 100 mg
    Substance name tamsulosin hydrochloride
    Declared content
    99.9 % of C20H28N2O5S,HCl
    Current batch 4474
    QTY (Max 25)
  • Search result 3

    Category Number 877
    Pack size 25 mg
    Substance name tamsulosin hydrochloride impurity standard
    Declared content Not applicable
    Current batch 4531
    Out of Stock
  • Search result 4

    Category Number 1202
    Pack size 100 mg
    Substance name telmisartan
    Declared content
    99.4% of C33H30N4O2
    Current batch 3971
    QTY (Max 25)
  • Search result 5

    Category Number 455
    Pack size 100 mg
    Substance name temazepam
    Declared content
    100.0% of C16H13ClN2O2
    Current batch 4166
    QTY (Max 5)
  • Search result 6

    Category Number 1246
    Pack size 100 mg
    Substance name temozolomide
    Declared content
    99.5% of C6H6N6O2
    Current batch 4247
    QTY (Max 2)
  • Search result 7

    Category Number 708
    Pack size 100 mg
    Substance name tenoxicam
    Declared content
    99.6% of C13H11N3O4S2
    Current batch 4260
    QTY (Max 25)
  • Search result 8

    Category Number 709
    Pack size 25 mg
    Substance name tenoxicam degradation impurity standard
    Declared content Not applicable
    Current batch 4438
    QTY (Max 25)
  • Search result 9

    Category Number 1159
    Pack size 100 mg
    Substance name terbinafine hydrochloride
    Declared content
    99.7% of C21H26CIN
    88.6% of C21H25N
    Current batch 3801
    QTY (Max 25)
  • Search result 10

    Category Number 1045
    Pack size 15 mg
    Substance name terbutaline impurity C
    Declared content Not applicable
    Current batch 3253
    QTY (Max 25)
  • Search result 11

    Category Number 1317
    Pack size 100mg
    Substance name terbutaline impurity standard
    Declared content Not applicable
    Current batch 4877
    QTY (Max 25)
  • Search result 12

    Category Number 318
    Pack size 100 mg
    Substance name terbutaline sulfate
    Declared content
    99.9% of (C12H19NO3)2,H2SO4
    Current batch 3165
    QTY (Max 25)
  • Search result 13

    Category Number 650
    Pack size 100 mg
    Substance name terfenadine
    Declared content
    99.8% of C32H41NO2
    Current batch 2210
    QTY (Max 25)
  • Search result 14

    Category Number 1076
    Pack size 25 mg
    Substance name testosterone
    Declared content Not applicable
    Current batch 3469
    QTY (Max 25)
  • Search result 15

    Category Number 319
    Pack size 100 mg
    Substance name testosterone decanoate
    Declared content Not applicable
    Current batch 3159
    QTY (Max 25)
  • Search result 16

    Category Number 728
    Pack size 100 mg
    Substance name testosterone enantate
    Declared content
    96.7 % of C26H40O3
    Current batch 4412
    Discontinued
  • Search result 17

    Category Number 321
    Pack size 100 mg
    Substance name testosterone isocaproate
    Declared content Not applicable
    Current batch 3162
    QTY (Max 25)
  • Search result 18

    Category Number 322
    Pack size 100 mg
    Substance name testosterone phenylpropionate
    Declared content
    99.9% of C28H36O3
    Current batch 3160
    Discontinued
  • Search result 19

    Category Number 702
    Pack size 100 mg
    Substance name testosterone propionate
    Declared content
    99.9% of C22H32O3
    Current batch 3161
    QTY (Max 5)
  • Search result 20

    Category Number 480
    Pack size 100 mg
    Substance name tetracycline hydrochloride
    Declared content
    97.5 % of C22H24N2O8, HCl
    Current batch 4564
    Out of Stock
  • Search result 21

    Category Number 327
    Pack size 100 mg
    Substance name theophylline
    Declared content
    99.9% of C7H8N4O2
    Current batch 2726
    QTY (Max 25)
  • Search result 22

    Category Number 414
    Pack size 100 mg
    Substance name thiamine mononitrate
    Declared content
    99.5% of C12H17N5O4S
    Current batch 3998
    QTY (Max 5)
  • Search result 23

    Category Number 495
    Pack size 100 mg
    Substance name thioridazine
    Declared content
    99.8% of C21H26N2S2
    Current batch 1766
    Discontinued
  • Search result 24

    Category Number 331
    Pack size 100 mg
    Substance name thiotepa
    Declared content
    98.7 % of C6H12N3PS
    Current batch 4815
    QTY (Max 25)
  • Search result 25

    Category Number 848
    Pack size 100 mg
    Substance name tibolone
    Declared content
    99.5 % of C21H28O2
    Current batch 4413
    QTY (Max 25)
  • Search result 26

    Category Number 849
    Pack size 10 mg
    Substance name tibolone impurity standard
    Declared content Not applicable
    Current batch 4210
    Out of Stock
  • Search result 27

    Category Number 1086
    Pack size 50 mg
    Substance name ticarcillin impurity A
    Declared content Not applicable
    Current batch 3424
    QTY (Max 25)
  • Search result 28

    Category Number 1079
    Pack size 25 mg
    Substance name ticarcillin impurity B
    Declared content Not applicable
    Current batch 3422
    QTY (Max 25)
  • Search result 29

    Category Number 1080
    Pack size 25 mg
    Substance name ticarcillin impurity C
    Declared content Not applicable
    Current batch 3423
    QTY (Max 25)
  • Search result 30

    Category Number 1087
    Pack size 250 mg
    Substance name ticarcillin monosodium
    Declared content
    91.9 % of C15H15N2NaO6S2
    Current batch 4137
    Out of Stock
  • Search result 31

    Category Number 1046
    Pack size 500 mg
    Substance name timolol maleate
    Declared content
    100.0% of C13H24N4O3S, C4H4O4
    Current batch 4486
    QTY (Max 25)
  • Search result 32

    Category Number 645
    Pack size 100 mg
    Substance name tioconazole
    Declared content Not applicable
    Current batch 2309
    QTY (Max 1)
  • Search result 33

    Category Number 687
    Pack size 100 mg
    Substance name tioconazole impurity standard
    Declared content Not applicable
    Current batch 3669
    QTY (Max 1)
  • Search result 34

    Category Number 878
    Pack size 100 mg
    Substance name tioguanine
    Declared content
    98.8 % of C5H5N5S
    Current batch 4388
    QTY (Max 25)
  • Search result 35

    Category Number 333
    Pack size 350 mg
    Substance name tobramycin
    Declared content
    See leaflet provided with the BPCRS
    Current batch 4251
    QTY (Max 25)
  • Search result 36

    Category Number 1218
    Pack size 100 mg
    Substance name tolterodine tartrate
    Declared content
    100.0% of C22H31NO, C4H6O6
    Current batch 4044
    QTY (Max 25)
  • Search result 37

    Category Number 744
    Pack size 100 mg
    Substance name tramadol hydrochloride
    Declared content
    99.8% of C16H25NO2,HCl
    Current batch 4717
    QTY (Max 5)
  • Search result 38

    Category Number 893
    Pack size 15 mg
    Substance name tramadol impurity A
    Declared content Not applicable
    Current batch 3209
    QTY (Max 10)
  • Search result 39

    Category Number 1089
    Pack size 200 mg
    Substance name trandolapril
    Declared content
    99.6% of C24H34N2O5
    Current batch 3432
    QTY (Max 25)
  • Search result 40

    Category Number 1085
    Pack size 10 mg
    Substance name trandolapril impurity E
    Declared content Not applicable
    Current batch 3388
    QTY (Max 25)
  • Search result 41

    Category Number 1263
    Pack size 100 mg
    Substance name tranexamic acid
    Declared content
    99.5 % of C8H15NO2
    Current batch 4411
    QTY (Max 25)
  • Search result 42

    Category Number 734
    Pack size 25 mg
    Substance name tranexamic acid impurity standard
    Declared content Not applicable
    Current batch 4790
    QTY (Max 25)
  • Search result 43

    Category Number 565
    Pack size 50 mg
    Substance name trans-clopenthixol acetate dihydrochloride
    Declared content Not applicable
    Current batch 2018
    QTY (Max 25)
  • Search result 44

    Category Number 566
    Pack size 25 mg
    Declared content Not applicable
    Current batch 2021
    QTY (Max 25)
  • Search result 45

    Category Number 561
    Pack size 25 mg
    Substance name trans-clopenthixol hydrochloride
    Declared content Not applicable
    Current batch 4304
    QTY (Max 25)
  • Search result 46

    Category Number 556
    Pack size 25 mg
    Substance name trans-flupentixol decanoate dihydrochloride
    Declared content Not applicable
    Current batch 3202
    QTY (Max 25)
  • Search result 47

    Category Number 544
    Pack size 25 mg
    Substance name transplatin
    Declared content Not applicable
    Current batch 4730
    QTY (Max 25)
  • Search result 48

    Category Number 1275
    Pack size 25 mg
    Substance name tranylcypromine sulfate impurity standard
    Declared content Not applicable
    Current batch 4578
    QTY (Max 25)
  • Search result 49

    Category Number 590
    Pack size 100 mg
    Substance name trazodone hydrochloride
    Declared content
    99.8 % of C19H22ClN5O, HCl
    Current batch 4533
    QTY (Max 25)
  • Search result 50

    Category Number 591
    Pack size 50 mg
    Substance name trazodone hydrochloride impurity standard
    Declared content Not applicable
    Current batch 4222
    QTY (Max 25)
  • Search result 51

    Category Number 1205
    Pack size 100 mg
    Substance name tretinoin
    Declared content
    99.5% of C20H28O2
    Current batch 3981
    QTY (Max 25)
  • Search result 52

    Category Number 338
    Pack size 100 mg
    Substance name triamcinolone
    Declared content
    99.5% of C21H27FO6
    Current batch 4281
    QTY (Max 25)
  • Search result 53

    Category Number 339
    Pack size 50 mg
    Substance name triamcinolone acetonide
    Declared content
    98.6% of C24H31FO6
    Current batch 3675
    QTY (Max 25)
  • Search result 54

    Category Number 680
    Pack size 100 mg
    Substance name triamcinolone hexacetonide
    Declared content
    99.6 % of C30H41FO7
    Current batch 2259
    QTY (Max 1)
  • Search result 55

    Category Number 340
    Pack size 100 mg
    Substance name triamterene
    Declared content
    99.2% of C12H11N7
    Current batch 3485
    QTY (Max 25)
  • Search result 56

    Category Number 1126
    Pack size 100 mg
    Substance name trifluridine
    Declared content
    100.0 % of C10H11F3N2O5
    Current batch 3684
    QTY (Max 25)
  • Search result 57

    Category Number 1127
    Pack size 20 mg
    Substance name trifluridine impurity standard
    Declared content Not applicable
    Current batch 3811
    QTY (Max 25)
  • Search result 58

    Category Number 34
    Pack size 100 mg
    Substance name trihexyphenidyl hydrochloride
    Declared content
    99.3% of C20H32CINO
    Current batch 4152
    QTY (Max 25)
  • Search result 59

    Category Number 344
    Pack size 100 mg
    Substance name trimethoprim
    Declared content
    99.8 % of C14H18N4O3
    Current batch 4376
    QTY (Max 25)
  • Search result 60

    Category Number 347
    Pack size 100 mg
    Substance name triprolidine hydrochloride
    Declared content Not applicable
    Current batch 4347
    QTY (Max 25)
  • Search result 61

    Category Number 1185
    Pack size 1 ng
    Substance name trnH-psbA
    Declared content Not applicable
    Current batch 3837
    QTY (Max 25)
  • Search result 62

    Category Number 1047
    Pack size 50 mg
    Substance name tropicamide
    Declared content Not applicable
    Current batch 3350
    QTY (Max 1)
  • Search result 63

    Category Number 1064
    Pack size 100 mg
    Substance name trospium chloride
    Declared content
    99.5% of C25H30ClNO3
    Current batch 3280
    QTY (Max 25)
  • Search result 64

    Category Number 1155
    Pack size 25 mg
    Substance name trospium chloride impurity standard
    Declared content Not applicable
    Current batch 3752
    QTY (Max 25)
  • Search result 65

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