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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.

27,990products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,098 Pharmacopeial Impurities (EP / USP / BP) 4,399 Nitrosamine Impurities 631 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,504 Metabolites & Degradation Products 3,922 API Reference Standards 3,436

Reference Standard

rac 8-Hydroxy Efavirenz chemical structure

rac 8-Hydroxy Efavirenz

CAS: 205754-32-1
Formula: C₁₄H₉ClF₃NO₃
MW: 331.67 g/mol

VQ-036895

Reference Standard

rac All-trans 4-Hydroxy Retinoic Acid chemical structure

rac All-trans 4-Hydroxy Retinoic Acid

CAS: 66592-72-1
Formula: C₂₀H₂₈O₃
MW: 316.4 g/mol

VQ-022878

Reference Standard

rac Ambrisentan chemical structure

rac Ambrisentan

CAS: 713516-99-5
Formula: C₂₂H₂₂N₂O₄
MW: 378.4 g/mol

VQ-028856

Reference Standard

rac Ambrisentan Methyl Ester chemical structure

rac Ambrisentan Methyl Ester

CAS: 1240470-84-1
Formula: C₂₃H₂₄N₂O₄
MW: 392.4 g/mol

VQ-021534

Reference Standard

rac Atomoxetine Hydrochloride chemical structure

rac Atomoxetine Hydrochloride

CAS: 82857-40-7
Formula: C₁₇H₂₂ClNO
MW: 291.8 g/mol

VQ-028891

Reference Standard

rac Benidipine hydrochloride chemical structure

rac Benidipine hydrochloride

CAS: 91599-74-5
Formula: C₂₈H₃₂ClN₃O₆
MW: 542 g/mol

VQ-024533

Reference Standard

rac Bepotastine chemical structure

rac Bepotastine

CAS: 1070505-53-1
Formula: C₂₁H₂₅ClN₂O₃
MW: 388.9 g/mol

VQ-035946

Reference Standard

rac Biotin-d4 chemical structure

CAS: 1217850-77-5
Formula: C₁₀H₁₆N₂O₃S
MW: 248.34 g/mol

VQ-043384

Reference Standard

Rac Brivaracetam Carboxylic acid chemical structure

Rac Brivaracetam Carboxylic acid

CAS: 2663706-07-6
Formula: C₁₁H₁₉NO₃
MW: 213.27 g/mol

VQ-029517

Reference Standard

rac Carprofen-d3 chemical structure

rac Carprofen-d3

CAS: 1173019-42-5
Formula: C₁₅H₁₂ClNO₂
MW: 276.73 g/mol

VQ-029664

Reference Standard

rac Cinacalcet-d3 Hydrochloride chemical structure

rac Cinacalcet-d3 Hydrochloride

CAS: 1185097-33-9
Formula: C₂₂H₂₃ClF₃N
MW: 396.9 g/mol

VQ-047794

Reference Standard

rac cis-9,10-Epoxystearic Acid chemical structure

rac cis-9,10-Epoxystearic Acid

CAS: 24560-98-3
Formula: C₁₈H₃₄O₃
MW: 298.5 g/mol

VQ-040203

Reference Standard

Rac Crizotinib chemical structure

CAS: 877400-66-3
Formula: C₂₁H₂₂Cl₂FN₅O
MW: 450.3 g/mol

VQ-036448

Reference Standard

rac Dehydro-O-desmethyl Venlafaxine chemical structure

rac Dehydro-O-desmethyl Venlafaxine

CAS: 1346600-38-1
Formula: C₁₆H₂₃NO
MW: 245.36 g/mol

VQ-028658

Reference Standard

rac Demethyl Citalopram chemical structure

rac Demethyl Citalopram

CAS: 62498-67-3
Formula: C₁₉H₁₉FN₂O
MW: 310.4 g/mol

VQ-022200

Reference Standard

rac Deoxy-O-desmethyl Venlafaxine chemical structure

rac Deoxy-O-desmethyl Venlafaxine

CAS: 1346605-18-2
Formula: C₁₆H₂₅NO
MW: 247.38 g/mol

VQ-034578

Reference Standard

rac Desfluoro Citalopram Oxalate chemical structure

rac Desfluoro Citalopram Oxalate

CAS: 1093072-86-6
Formula: C₂₂H₂₄N₂O₅
MW: 396.4 g/mol

VQ-024997

Reference Standard

rac Desmethyl Citalopram Hydrochloride chemical structure

rac Desmethyl Citalopram Hydrochloride

CAS: 97743-99-2
Formula: C₁₉H₂₀ClFN₂O
MW: 346.8 g/mol

VQ-024993

Reference Standard

rac Didemethyl Citalopram chemical structure

rac Didemethyl Citalopram

CAS: 62498-69-5
Formula: C₁₈H₁₇FN₂O
MW: 296.3 g/mol

VQ-029825

Reference Standard

rac Duloxetine 3-Thiophene Isomer chemical structure

rac Duloxetine 3-Thiophene Isomer

CAS: 116817-27-7
Formula: C₁₈H₁₉NOS
MW: 297.4 g/mol

VQ-036856

Reference Standard

rac Efavirenz-d4 chemical structure

rac Efavirenz-d4

CAS: 1246812-58-7
Formula: C₁₄H₉ClF₃NO₂
MW: 319.7 g/mol

VQ-048141

Reference Standard

rac Epinephrine chemical structure

rac Epinephrine

CAS: 329-65-7
Formula: C₉H₁₃NO₃
MW: 183.2 g/mol

VQ-026950

Reference Standard

rac Epinephrine-1-Sulfuronthiate chemical structure

rac Epinephrine-1-Sulfuronthiate

CAS: 859066-02-7
Formula: C₉H₁₃NO₅S₂
MW: 279.3 g/mol

VQ-029041

Reference Standard

rac erythro-Dihydro Bupropion D9 chemical structure

rac erythro-Dihydro Bupropion D9

CAS: 1217684-77-9
Formula: C₁₃H₂₀ClNO
MW: 250.81 g/mol

VQ-043401

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