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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

Clofazimine Iminophenazine Impurity chemical structure

Clofazimine Iminophenazine Impurity

CAS: 1332634-93-1
Formula: C₁₈H₁₃ClN₄
MW: 320.8 g/mol

VQ-047833

Reference Standard

Clofedanol chemical structure

CAS: 791-35-5
Formula: C₁₇H₂₀ClNO
MW: 289.8 g/mol

VQ-029867

Reference Standard

Clofibrate chemical structure

CAS: 637-07-0
Formula: C₁₂H₁₅ClO₃
MW: 242.7 g/mol

VQ-036386

Reference Standard

Clomifene Citrate - Impurity C chemical structure

Clomifene Citrate - Impurity C

CAS: 5530-99-4
Formula: C₂₆H₂₉NO₂
MW: 387.5 g/mol

VQ-025044

Reference Standard

Clomifene Citrate - Impurity D chemical structure

Clomifene Citrate - Impurity D

CAS: 1391054-64-0
Formula: C₃₈H₄₆N₂O₃
MW: 578.8 g/mol

VQ-022236

Reference Standard

Clomifene EP Impurity E (Free Base) chemical structure

Clomifene EP Impurity E (Free Base)

CAS: 117884-82-9
Formula: C₂₆H₂₇Cl₂NO
MW: 440.4 g/mol

VQ-029868

Reference Standard

Clomifene EP Impurity F (Citrate Salt) chemical structure

Clomifene EP Impurity F (Citrate Salt)

CAS: 14158-75-9
Formula: C₃₂H₃₅Cl₂NO₈
MW: 632.5 g/mol

VQ-025040

Reference Standard

Clomiphene chemical structure

CAS: 911-45-5
Formula: C₂₆H₂₈ClNO
MW: 406 g/mol

VQ-036390

Reference Standard

Clomiphene Citrate chemical structure

Clomiphene Citrate

CAS: 50-41-9
Formula: C₃₂H₃₆ClNO₈
MW: 598.1 g/mol

VQ-036387

Reference Standard

Clomiphene Desethyl Impurity chemical structure

Clomiphene Desethyl Impurity

CAS: 79838-50-9
Formula: C₂₄H₂₄ClNO
MW: 377.9 g/mol

VQ-035412

Reference Standard

Clomiphene EP Impurity A

Clomiphene EP Impurity A

CAS: 19957-53-0
Formula: C₃₂H₃₇NO₈
MW: 563.65 g/mol

VQ-035281

Reference Standard

Clomiphene EP Impurity E chemical structure

Clomiphene EP Impurity E

CAS: 117884-83-0
Formula: C₃₂H₃₅Cl₂NO₈
MW: 632.5 g/mol

VQ-022234

Reference Standard

Clomiphene EP Impurity F chemical structure

Clomiphene EP Impurity F

CAS: 47648-28-2
Formula: C₂₆H₂₇Cl₂NO
MW: 440.4 g/mol

VQ-043119

Reference Standard

Clomiphene Impurity 1 chemical structure

Clomiphene Impurity 1

CAS: 73404-00-9
Formula: C₂₆H₃₁NO₂
MW: 389.5 g/mol

VQ-025047

Reference Standard

Clomiphene N-Oxide chemical structure

Clomiphene N-Oxide

CAS: 97642-74-5
Formula: C₂₆H₂₈ClNO₂
MW: 422 g/mol

VQ-029869

Reference Standard

Clomiphene-d5 Citrate chemical structure

Clomiphene-d5 Citrate

CAS: 1217200-17-3
Formula: C₃₂H₃₆ClNO₈
MW: 603.1 g/mol

VQ-036392

Reference Standard

Clomiphene-D5 Hydrochloride chemical structure

Clomiphene-D5 Hydrochloride

CAS: 1346606-66-3
Formula: C₂₆H₂₉Cl₂NO
MW: 447.4 g/mol

VQ-047836

Reference Standard

Clomipramine chemical structure

CAS: 303-49-1
Formula: C₁₉H₂₃ClN₂
MW: 314.9 g/mol

VQ-036393

Reference Standard

Clomipramine Dihydrochloride EP Impurity A chemical structure

Clomipramine Dihydrochloride EP Impurity A

CAS: 2305824-51-3
Formula: C₂₃H₃₄Cl₃N₃
MW: 458.9 g/mol

VQ-029870

Reference Standard

Clomipramine EP Impurity C chemical structure

Clomipramine EP Impurity C

CAS: 2095-42-3
Formula: C₁₉H₂₁ClN₂
MW: 312.8 g/mol

VQ-036395

Reference Standard

Clomipramine EP Impurity D chemical structure

Clomipramine EP Impurity D

CAS: 3589-22-8
Formula: C₁₉H₂₂Cl₂N₂
MW: 349.3 g/mol

VQ-047837

Reference Standard

Clomipramine EP Impurity D Hydrochloride chemical structure

Clomipramine EP Impurity D Hydrochloride

CAS: 115189-28-1
Formula: C₁₉H₂₃Cl₃N₂
MW: 385.8 g/mol

VQ-025049

Reference Standard

Clomipramine EP Impurity F chemical structure

Clomipramine EP Impurity F

CAS: 32943-25-2
Formula: C₁₄H₁₂ClN
MW: 229.7 g/mol

VQ-022237

Reference Standard

Clomipramine EP Impurity G chemical structure

Clomipramine EP Impurity G

CAS: 1425793-87-8
Formula: C₁₇H₁₆ClN
MW: 269.8 g/mol

VQ-025050

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