Skip to content

Product division

Impurities & Reference Standards

Pharmacopoeial and non-pharmacopoeial impurities, metabolites, nitrosamines and working standards with characterisation data for QC and regulatory work.

28,554products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,252 Pharmacopeial Impurities (EP / USP / BP) 4,401 Nitrosamine Impurities 650 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,612 Metabolites & Degradation Products 4,146 API Reference Standards 3,493

Reference Standard

Cefiderocol chemical structure

CAS: 1225208-94-5
Formula: C₃₀H₃₄ClN₇O₁₀S₂
MW: 752.2 g/mol

VQ-024851

Reference Standard

Cefixime chemical structure

CAS: 79350-37-1
Formula: C₁₆H₁₅N₅O₇S₂
MW: 453.5 g/mol

VQ-022085

Reference Standard

Cefixime EP Impurity A chemical structure

Cefixime EP Impurity A

CAS: 1614255-90-1
Formula: C₁₆H₁₇N₅O₈S₂
MW: 471.5 g/mol

VQ-021097

Reference Standard

Cefixime EP Impurity B chemical structure

Cefixime EP Impurity B

CAS: 1335475-19-8
Formula: C₁₅H₁₇N₅O₆S₂
MW: 427.5 g/mol

VQ-029691

Reference Standard

Cefixime EP Impurity C chemical structure

Cefixime EP Impurity C

CAS: 108691-83-4
Formula: C₁₆H₁₅N₅O₇S₂
MW: 453.5 g/mol

VQ-021095

Reference Standard

Cefixime EP Impurity D chemical structure

Cefixime EP Impurity D

CAS: 97164-56-2
Formula: C₁₆H₁₅N₅O₇S₂
MW: 453.5 g/mol

VQ-021094

Reference Standard

Cefixime EP Impurity E chemical structure

Cefixime EP Impurity E

CAS: 72701-01-0
Formula: C₁₅H₁₅N₅O₇S₂
MW: 441.4 g/mol

VQ-022083

Reference Standard

Cefixime EP Impurity F chemical structure

Cefixime EP Impurity F

CAS: 79368-95-9
Formula: C₁₈H₁₉N₅O₇S₂
MW: 481.5 g/mol

VQ-024854

Reference Standard

Cefixime Methyl Ester chemical structure

Cefixime Methyl Ester

CAS: 88621-01-6
Formula: C₁₇H₁₇N₅O₇S₂
MW: 467.5 g/mol

VQ-028818

Reference Standard

Cefixime Sulfone Impurity chemical structure

Cefixime Sulfone Impurity

CAS: 2682217-22-5
Formula: C₁₆H₁₅N₅O₉S₂
MW: 485.5 g/mol

VQ-029692

Reference Standard

Cefixime Sulfoxide chemical structure

Cefixime Sulfoxide

CAS: 1335555-87-7
Formula: C₁₆H₁₅N₅O₈S₂
MW: 469.5 g/mol

VQ-024853

Reference Standard

Cefixime tert-Butyl Ester chemical structure

Cefixime tert-Butyl Ester

CAS: 79368-92-6
Formula: C₂₀H₂₃N₅O₇S₂
MW: 509.6 g/mol

VQ-022084

Reference Standard

Cefmetazole chemical structure

CAS: 56796-20-4
Formula: C₁₅H₁₇N₇O₅S₃
MW: 471.5 g/mol

VQ-029693

Reference Standard

Cefmetazole Ditetrazole chemical structure

Cefmetazole Ditetrazole

CAS: 74228-11-8
Formula: C₁₅H₁₈N₁₀O₅S₃
MW: 514.6 g/mol

VQ-043104

Reference Standard

Cefmetazole Lactone chemical structure

Cefmetazole Lactone

CAS: 70993-70-3
Formula: C₁₃H₁₃N₃O₅S₂
MW: 355.4 g/mol

VQ-034809

Reference Standard

Cefmetazole Sodium chemical structure

Cefmetazole Sodium

CAS: 56796-39-5
Formula: C₁₅H₁₆N₇NaO₅S₃
MW: 493.5 g/mol

VQ-043103

Reference Standard

Cefminox chemical structure

CAS: 84305-41-9
Formula: C₁₆H₂₁N₇O₇S₃
MW: 519.6 g/mol

VQ-047712

Reference Standard

Cefodizime chemical structure

CAS: 69739-16-8
Formula: C₂₀H₂₀N₆O₇S₄
MW: 584.7 g/mol

VQ-035062

Reference Standard

Cefodizime Impurity 1

Cefodizime Impurity 1

CAS: 111874-11-4
Formula: C₂₀H₂₀N₆O₇S₄
MW: 584.7 g/mol

VQ-045402

Reference Standard

Cefoperazone Acid chemical structure

Cefoperazone Acid

CAS: 62893-19-0
Formula: C₂₅H₂₇N₉O₈S₂
MW: 645.7 g/mol

VQ-024855

Reference Standard

Cefoperazone dihydrate chemical structure

Cefoperazone dihydrate

CAS: 113826-44-1
Formula: C₂₅H₃₁N₉O₁₀S₂
MW: 681.7 g/mol

VQ-029694

Reference Standard

Cefoperazone EP Impurity A chemical structure

Cefoperazone EP Impurity A

CAS: 73240-08-1
Formula: C₂₃H₂₃N₅O₈S
MW: 529.5 g/mol

VQ-021098

Reference Standard

Cefoperazone EP Impurity B chemical structure

Cefoperazone EP Impurity B

CAS: 711598-76-4
Formula: C₂₅H₂₇N₉O₈S₂
MW: 645.7 g/mol

VQ-024856

Reference Standard

Cefoperazone EP Impurity D chemical structure

Cefoperazone EP Impurity D

CAS: 37539-03-0
Formula: C₁₀H₁₁N₅O₃S₂
MW: 313.4 g/mol

VQ-022086

Need a price, a spec or a custom compound?

Send us your list — product names or CAS numbers, grade, quantity and destination. Our team replies with a formal quotation, COA and lead time.

Request a quote Contact sales