Reference Standards

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.

The BPCRS Catalogue is now available for download in Excel format, updated monthly to reflect the latest listings.

Search within this catalogue

951 items

  • Search result 1

    Category Number 726
    Pack size 100 mg
    Substance name diltiazem hydrochloride
    CAS Number 33286-22-5
    Quantitative Yes
    Current batch 3220
    QTY (Max 25)

  • Search result 2

    Category Number 899
    Pack size 25 mg
    Substance name diltiazem impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 3358
    QTY (Max 25)

  • Search result 3

    Category Number 865
    Pack size 25 mg
    Substance name dimethyl-2,6-dimethyl-4-(2-nitrophenyl)pyridine-3,5-dicarboxylate
    CAS Number 67035-22-7
    Quantitative No
    Current batch 3071
    QTY (Max 25)

  • Search result 4

    Category Number 866
    Pack size 25 mg
    Substance name dimethyl-2,6-dimethyl-4-(2-nitrosophenyl)pyridine-3,5-dicarboxylate
    CAS Number 50428-14-3
    Quantitative No
    Current batch 3072
    QTY (Max 25)

  • Search result 5

    Category Number 511
    Pack size 25 mg
    Substance name dimethyl{5-[2-(1-methylamino-2-nitrovinylamino)ethylsulfinylmethyl]furfuryl}amine
    CAS Number 73851-70-4
    Quantitative No
    Current batch 4069
    QTY (Max 25)

  • Search result 6

    Category Number 690
    Pack size 100 mg
    Substance name dimpylate
    CAS Number 333-41-5
    Quantitative Yes
    Current batch 4731
    QTY (Max 5)

  • Search result 7

    Category Number 691
    Pack size 100 mg
    Substance name dimpylate for chromatography
    CAS Number 333-41-5
    Quantitative No
    Current batch 4375
    QTY (Max 2)

  • Search result 8

    Category Number 902
    Pack size 100 mg
    Substance name dinoprostone
    CAS Number 363-24-6
    Quantitative Yes
    Current batch 3328
    Discontinued

  • Search result 9

    Category Number 896
    Pack size 100 mg
    Substance name diphenhydramine hydrochloride
    CAS Number 147-24-0
    Quantitative Yes
    Current batch 3764
    QTY (Max 25)

  • Search result 10

    Category Number 1119
    Pack size 25 mg
    Substance name diphenylmethanol
    CAS Number 91-01-0
    Quantitative No
    Current batch 3574
    QTY (Max 25)