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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

Ospemifene E-Isomer Impurity chemical structure

Ospemifene E-Isomer Impurity

CAS: 238089-02-6
Formula: C₂₄H₂₃ClO₂
MW: 378.9 g/mol

VQ-005450

Reference Standard

Ospemifene Ethyl Ester Impurity

Ospemifene Ethyl Ester Impurity

CAS: 341527-08-0
Formula: C₂₆H₂₅ClO₃
MW: 420.93 g/mol

VQ-044997

Reference Standard

Ospemifene Metabolite M3 chemical structure

Ospemifene Metabolite M3

CAS: 128585-02-4
Formula: C₂₄H₂₁ClO₃
MW: 392.9 g/mol

VQ-044996

Reference Standard

Ostarine chemical structure

CAS: 841205-47-8
Formula: C₁₉H₁₄F₃N₃O₃
MW: 389.3 g/mol

VQ-049367

Reference Standard

Osunprotafib chemical structure

CAS: 2489404-97-7
Formula: C₁₇H₂₄FN₃O₄S
MW: 385.5 g/mol

VQ-032905

Reference Standard

Oteseconazole chemical structure

CAS: 1340593-59-0
Formula: C₂₃H₁₆F₇N₅O₂
MW: 527.4 g/mol

VQ-027062

Reference Standard

Oteseconazole Epoxide Impurity chemical structure

Oteseconazole Epoxide Impurity

CAS: 294182-28-8
Formula: C₁₄H₈BrF₄NO
MW: 362.12 g/mol

VQ-045483

Reference Standard

Otilonium Bromide chemical structure

Otilonium Bromide

CAS: 26095-59-0
Formula: C₂₉H₄₃BrN₂O₄
MW: 563.6 g/mol

VQ-027319

Reference Standard

Otilonium Bromide Impurity 14 Bromide chemical structure

Otilonium Bromide Impurity 14 Bromide

CAS: 26187-16-6
Formula: C₃₀H₄₅BrN₂O₄
MW: 577.6 g/mol

VQ-041251

Reference Standard

Otilonium Bromide Impurity 3 chemical structure

Otilonium Bromide Impurity 3

CAS: 14629-01-7
Formula: C₁₄H₂₃BrN₂O₂
MW: 331.25 g/mol

VQ-027320

Reference Standard

Ouratea proanthocyanidin A chemical structure

Ouratea proanthocyanidin A

CAS: 274678-42-1
Formula: C₃₁H₂₈O₁₂
MW: 592.5 g/mol

VQ-039775

Reference Standard

Oxaceprol chemical structure

CAS: 33996-33-7
Formula: C₇H₁₁NO₄
MW: 173.17 g/mol

VQ-041252

Reference Standard

Oxacillin chemical structure

CAS: 66-79-5
Formula: C₁₉H₁₉N₃O₅S
MW: 401.4 g/mol

VQ-044185

Reference Standard

Oxacillin EP Impurity B chemical structure

Oxacillin EP Impurity B

CAS: 1642629-95-5
Formula: C₁₉H₂₁N₃O₆S
MW: 419.5 g/mol

VQ-041254

Reference Standard

Oxacillin EP Impurity C chemical structure

Oxacillin EP Impurity C

CAS: 1136-45-4
Formula: C₁₁H₉NO₃
MW: 203.19 g/mol

VQ-032988

Reference Standard

Oxacillin Impurity G chemical structure

Oxacillin Impurity G

CAS: 724695-30-1
Formula: C₁₉H₁₈ClN₃O₅S
MW: 435.9 g/mol

VQ-032990

Reference Standard

Oxacillin Sodium Monohydrate chemical structure

Oxacillin Sodium Monohydrate

CAS: 7240-38-2
Formula: C₁₉H₂₀N₃NaO₆S
MW: 441.4 g/mol

VQ-019562

Reference Standard

Oxacillin Sodium Monohydrate EP Impurity F chemical structure

Oxacillin Sodium Monohydrate EP Impurity F

CAS: 5053-35-0
Formula: C₁₉H₁₉N₃O₄S₂
MW: 417.5 g/mol

VQ-032989

Reference Standard

Oxacillin sodium salt chemical structure

Oxacillin sodium salt

CAS: 1173-88-2
Formula: C₁₉H₁₈N₃NaO₅S
MW: 423.4 g/mol

VQ-041253

Reference Standard

Oxacyclohexane Open Ring Tacrolimus chemical structure

Oxacyclohexane Open Ring Tacrolimus

CAS: 144432-23-5
Formula: C₄₄H₇₁NO₁₃
MW: 822 g/mol

VQ-028173

Reference Standard

Oxaliplatin - Impurity B (Tosylate Salt) chemical structure

Oxaliplatin - Impurity B (Tosylate Salt)

CAS: 1613271-93-4
Formula: C₂₀H₃₄N₂O₈PtS₂⁺4
MW: 689.7 g/mol

VQ-052489

Reference Standard

Oxaliplatin EP impurity B chemical structure

Oxaliplatin EP impurity B

CAS: 89955-85-1
Formula: C₆H₂₀N₂O₂Pt⁺2
MW: 347.32 g/mol

VQ-032991

Reference Standard

Oxaliplatin EP Impurity C chemical structure

Oxaliplatin EP Impurity C

CAS: 111321-67-6
Formula: C₈H₁₆N₂O₆Pt
MW: 431.31 g/mol

VQ-027322

Reference Standard

Oxaliplatin EP Impurity D chemical structure

Oxaliplatin EP Impurity D

CAS: 111263-58-2
Formula: C₈H₁₄N₂O₆Pt-2
MW: 429.29 g/mol

VQ-032994

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