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Impurity Reference Standards

Pharmacopoeial impurities, nitrosamines, metabolites, labelled internal standards and API working standards, each backed by analytical data for method development and QC.

20,060 products6 categories2,050 in stockCOA + SDS with every lot

20,060 products · page 513 of 836

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Isobutyl Benzene Sulfonate

CAS: 24698-43-9
Formula: C₁₀H₁₄O₃S
MW: 214.28 g/mol

ZX-028129

Isobutylene Oxide

CAS: 558-30-5
Formula: C₄H₈O
MW: 72.11 g/mol

ZX-034198

Isobutyric-d6 Acid

CAS: 29054-08-8
Formula: C₄H₈O₂
MW: 94.14 g/mol

ZX-035900

Isocarboxazid

CAS: 59-63-2
Formula: C₁₂H₁₃N₃O₂
MW: 231.25 g/mol

ZX-029993

Isochroman

CAS: 493-05-0
Formula: C₉H₁₀O
MW: 134.17 g/mol

ZX-006581

Isoconazole

CAS: 27523-40-6
Formula: C₁₈H₁₄Cl₄N₂O
MW: 416.1 g/mol

ZX-025176

Isoconazole Nitrate

CAS: 24168-96-5
Formula: C₁₈H₁₅Cl₄N₃O₄
MW: 479.1 g/mol

ZX-025175

Isoconazole Nitrate EP Impurity B

CAS: 1305320-62-0
Formula: C₁₅H₁₃Cl₄NO
MW: 365.1 g/mol

ZX-025177

Isoconazole Nitrate EP Impurity B (Nitrate)

CAS: 2726492-80-2
Formula: C₁₅H₁₄Cl₄N₂O₄
MW: 428.1 g/mol

ZX-044573

Isocycloseram

CAS: 2061933-85-3
Formula: C₂₃H₁₉Cl₂F₄N₃O₄
MW: 548.3 g/mol

ZX-029995

Isoescin IA

CAS: 219944-39-5
Formula: C₅₅H₈₆O₂₄
MW: 1131.3 g/mol

ZX-029324

Isoescin IB

CAS: 219944-46-4
Formula: C₅₅H₈₆O₂₄
MW: 1131.3 g/mol

ZX-029322

Isoflupredone

CAS: 338-95-4
Formula: C₂₁H₂₇FO₅
MW: 378.4 g/mol

ZX-020002

Isoflupredone 21-Phosphate Ester Disodium Salt

CAS: 94088-00-3
Formula: C₂₁H₂₆FNa₂O₈P
MW: 502.4 g/mol

ZX-021895

Isoflupredone Acetate

CAS: 338-98-7
Formula: C₂₃H₂₉FO₆
MW: 420.5 g/mol

ZX-020298

Isoflupropedone-21 phosphate

CAS: 432-44-0
Formula: C₂₁H₂₈FO₈P
MW: 458.4 g/mol

ZX-031577

Isoflurane

CAS: 26675-46-7
Formula: C₃H₂ClF₅O
MW: 184.49 g/mol

ZX-029996

Isoflurane EP Impurity A

CAS: 33018-78-9
Formula: C₃H₂ClF₅O
MW: 184.49 g/mol

ZX-029999

Isoflurane EP Impurity B

CAS: 1885-48-9
Formula: C₃H₃F₅O
MW: 150.05 g/mol

ZX-029997

Isoflurane EP Impurity C

CAS: 32778-08-8
Formula: C₃HCl₂F₅O
MW: 218.93 g/mol

ZX-025178

Isoflurane EP Impurity D

CAS: 32778-07-7
Formula: C₃HCl₂F₅O
MW: 218.93 g/mol

ZX-025179

Isoflurane EP Impurity E

CAS: 32778-09-9
Formula: C₃Cl₃F₅O
MW: 253.38 g/mol

ZX-029998

Isoleucine Valsartan

CAS: 137862-78-3
Formula: C₂₅H₃₁N₅O₃
MW: 449.5 g/mol

ZX-027506

Isoliquiritigenin

CAS: 961-29-5
Formula: C₁₅H₁₂O₄
MW: 256.25 g/mol

ZX-034896

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