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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

Dehydroxyl Vancomycin-B

Dehydroxyl Vancomycin-B

CAS: 1378999-72-4
Formula: C₆₆H₇₅Cl₂N₉O₂₃
MW: 1433.26 g/mol

VQ-034541

Reference Standard

Deisopropylatrazine chemical structure

Deisopropylatrazine

CAS: 1007-28-9
Formula: C₅H₈ClN₅
MW: 173.6 g/mol

VQ-032586

Reference Standard

Delafloxacin chemical structure

CAS: 189279-58-1
Formula: C₁₈H₁₂ClF₃N₄O₄
MW: 440.8 g/mol

VQ-025236

Reference Standard

Delafloxacin Dimer Impurity chemical structure

Delafloxacin Dimer Impurity

CAS: 1093185-35-3
Formula: C₃₆H₂₄Cl₂F₆N₈O₈
MW: 881.5 g/mol

VQ-025238

Reference Standard

Delafloxacin meglumine chemical structure

Delafloxacin meglumine

CAS: 352458-37-8
Formula: C₂₅H₂₉ClF₃N₅O₉
MW: 636 g/mol

VQ-030112

Reference Standard

Delamanid chemical structure

CAS: 681492-22-8
Formula: C₂₅H₂₅F₃N₄O₆
MW: 534.5 g/mol

In stock

Reference Standard

Delamanid D4 chemical structure

CAS: 2747917-54-8
Formula: C₂₅H₂₅F₃N₄O₆
MW: 538.5 g/mol

VQ-036613

Reference Standard

Delamanid Phenyl Epoxide Mesylate (S)-Isomer Impurity chemical structure

Delamanid Phenyl Epoxide Mesylate (S)-Isomer Impurity

CAS: 683276-63-3
Formula: C₁₀H₁₁NO₆S
MW: 273.26 g/mol

VQ-036611

Reference Standard

Delta 2-Cefepime chemical structure

Delta 2-Cefepime

CAS: 88040-25-9
Formula: C₂₃H₃₄N₆O₆S₂
MW: 554.7 g/mol

VQ-024850

Reference Standard

Delta 4 Abiraterone chemical structure

Delta 4 Abiraterone

CAS: 154229-21-7
Formula: C₂₄H₂₉NO
MW: 347.5 g/mol

VQ-021390

Reference Standard

Delta 5-Avenasterol chemical structure

Delta 5-Avenasterol

CAS: 18472-36-1
Formula: C₂₉H₄₈O
MW: 412.7 g/mol

VQ-035871

Reference Standard

Delta 5,6-Testosterone chemical structure

Delta 5,6-Testosterone

CAS: 571-25-5
Formula: C₁₉H₂₈O₂
MW: 288.4 g/mol

VQ-045354

Reference Standard

Delta 7-Stigmasterol chemical structure

Delta 7-Stigmasterol

CAS: 481-19-6
Formula: C₂₉H₄₆O
MW: 410.7 g/mol

VQ-039750

Reference Standard

Delta 8,9-Dehydro Estrone chemical structure

Delta 8,9-Dehydro Estrone

CAS: 474-87-3
Formula: C₁₈H₂₀O₂
MW: 268.3 g/mol

VQ-030578

Reference Standard

Delta 9,11 Testosterone Cypionate chemical structure

Delta 9,11 Testosterone Cypionate

CAS: 122651-11-0
Formula: C₂₇H₃₈O₃
MW: 410.6 g/mol

VQ-028300

Reference Standard

Delta 9,11-Testosterone Undecanoate chemical structure

Delta 9,11-Testosterone Undecanoate

CAS: 2241819-49-6
Formula: C₃₀H₄₆O₃
MW: 454.7 g/mol

VQ-028296

Reference Standard

Delta-1,6-Methylene-17-hydroxyprogesterone chemical structure

Delta-1,6-Methylene-17-hydroxyprogesterone

CAS: 1204325-01-8
Formula: C₂₂H₂₈O₃
MW: 340.5 g/mol

VQ-027645

Reference Standard

Delta-2-7-Aminodesacetoxy cephalosporanic Acid chemical structure

Delta-2-7-Aminodesacetoxy cephalosporanic Acid

CAS: 56487-68-4
Formula: C₈H₁₀N₂O₃S
MW: 214.24 g/mol

VQ-023475

Reference Standard

Delta-2-Avermectin B1a chemical structure

Delta-2-Avermectin B1a

CAS: 110415-68-4
Formula: C₄₈H₇₂O₁₄
MW: 873.1 g/mol

VQ-031349

Reference Standard

Delta-4-Tibolone chemical structure

Delta-4-Tibolone

CAS: 1162-60-3
Formula: C₂₁H₂₈O₂
MW: 312.4 g/mol

VQ-023891

Reference Standard

Delta-7-Natrexone methobromide chemical structure

Delta-7-Natrexone methobromide

CAS: 1027638-96-5
Formula: C₂₁H₂₄BrNO₄
MW: 434.3 g/mol

VQ-026827

Reference Standard

Delta-9,-11 Hydrocortisone hemisuccinate chemical structure

Delta-9,-11 Hydrocortisone hemisuccinate

CAS: 103497-66-1
Formula: C₂₅H₃₂O₇
MW: 444.5 g/mol

VQ-026080

Reference Standard

Delta-9,11-Betamethasone 21-Acetate chemical structure

Delta-9,11-Betamethasone 21-Acetate

CAS: 910-99-6
Formula: C₂₄H₃₀O₅
MW: 398.5 g/mol

VQ-029415

Reference Standard

Delta-9,11-Methylprednisolone Acetate chemical structure

Delta-9,11-Methylprednisolone Acetate

CAS: 93239-37-3
Formula: C₂₄H₃₀O₅
MW: 398.5 g/mol

VQ-026641

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