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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

Closantel EP Impurity G

Closantel EP Impurity G

CAS: 2724801-62-9
Formula: C₂₃H₁₈Cl₂I₂N₂O₃
MW: 695.12 g/mol

VQ-043122

Reference Standard

Closantel EP Impurity H

Closantel EP Impurity H

CAS: 2514666-07-8
Formula: C₂₃H₁₇Cl₂I₂NO₄
MW: 696.1 g/mol

In stock

Reference Standard

Closantel EP Impurity I

Closantel EP Impurity I

CAS: 2512196-10-8
Formula: C₂₂H₁₅Cl₂IN₂O₂
MW: 537.18 g/mol

VQ-035390

Reference Standard

Closantel EP Impurity J chemical structure

Closantel EP Impurity J

CAS: 2731038-10-9
Formula: C₄₄H₂₇Cl₃I₄N₄O₄
MW: 1289.7 g/mol

VQ-035391

Reference Standard

Closantel-13C6 chemical structure

CAS: 1325559-20-3
Formula: C₂₂H₁₄Cl₂I₂N₂O₂
MW: 669 g/mol

VQ-036422

Reference Standard

Clothianidin chemical structure

CAS: 210880-92-5
Formula: C₆H₈ClN₅O₂S
MW: 249.68 g/mol

VQ-029906

Reference Standard

Clotiazepam Impurity 2 chemical structure

Clotiazepam Impurity 2

CAS: 50509-09-6
Formula: C₁₅H₁₅ClN₂O₂S
MW: 322.8 g/mol

VQ-029907

Reference Standard

Cloticasone Propionate chemical structure

Cloticasone Propionate

CAS: 80486-69-7
Formula: C₂₅H₃₁ClF₂O₅S
MW: 517 g/mol

VQ-025881

Reference Standard

Clotrimazole EP Impurity A chemical structure

Clotrimazole EP Impurity A

CAS: 66774-02-5
Formula: C₁₉H₁₅ClO
MW: 294.8 g/mol

VQ-022242

Reference Standard

Clotrimazole EP Impurity B chemical structure

Clotrimazole EP Impurity B

CAS: 23593-71-7
Formula: C₂₂H₁₇ClN₂
MW: 344.8 g/mol

VQ-022243

Reference Standard

Clotrimazole EP Impurity E chemical structure

Clotrimazole EP Impurity E

CAS: 5162-03-8
Formula: C₁₃H₉ClO
MW: 216.66 g/mol

VQ-029908

Reference Standard

Clotrimazole EP Impurity F chemical structure

Clotrimazole EP Impurity F

CAS: 15469-97-3
Formula: C₂₂H₁₈N₂
MW: 310.4 g/mol

VQ-022244

Reference Standard

Clotrimazole Impurity 12 chemical structure

Clotrimazole Impurity 12

CAS: 59154-29-9
Formula: C₁₉H₁₄Cl₂
MW: 313.2 g/mol

VQ-029910

Reference Standard

Clotrimazole TRAM-34 Impurity chemical structure

Clotrimazole TRAM-34 Impurity

CAS: 289905-88-0
Formula: C₂₂H₁₇ClN₂
MW: 344.8 g/mol

VQ-036424

Reference Standard

Clotrimazole-d5 chemical structure

Clotrimazole-d5

CAS: 1185076-41-8
Formula: C₂₂H₁₇ClN₂
MW: 349.9 g/mol

VQ-029911

Reference Standard

Clovin chemical structure

CAS: 81970-00-5
Formula: C₃₃H₄₀O₂₀
MW: 756.7 g/mol

VQ-033707

Reference Standard

Cloxacillin chemical structure

CAS: 61-72-3
Formula: C₁₉H₁₈ClN₃O₅S
MW: 435.9 g/mol

VQ-043123

Reference Standard

Cloxacillin EP Impurity B chemical structure

Cloxacillin EP Impurity B

CAS: 1642559-64-5
Formula: C₁₈H₂₀ClN₃O₄S
MW: 409.9 g/mol

VQ-022247

Reference Standard

Cloxacillin EP Impurity D chemical structure

Cloxacillin EP Impurity D

CAS: 23598-72-3
Formula: C₁₁H₈ClNO₃
MW: 237.64 g/mol

VQ-022248

Reference Standard

Cloxacillin Sodium EP Impurity A chemical structure

Cloxacillin Sodium EP Impurity A

CAS: 1642629-96-6
Formula: C₁₉H₂₀ClN₃O₆S
MW: 453.9 g/mol

VQ-022246

Reference Standard

Cloxacillin Sodium EP Impurity E chemical structure

Cloxacillin Sodium EP Impurity E

CAS: 18704-55-7
Formula: C₂₇H₂₈ClN₅O₇S₂
MW: 634.1 g/mol

VQ-036427

Reference Standard

Cloxacillin sodium monohydrate chemical structure

Cloxacillin sodium monohydrate

CAS: 7081-44-9
Formula: C₁₉H₁₉ClN₃NaO₆S
MW: 475.9 g/mol

VQ-019554

Reference Standard

Clozapine chemical structure

CAS: 5786-21-0
Formula: C₁₈H₁₉ClN₄
MW: 326.8 g/mol

VQ-022249

Reference Standard

Clozapine D3 chemical structure

CAS: 1215691-72-7
Formula: C₁₈H₁₉ClN₄
MW: 329.8 g/mol

VQ-025071

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