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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

Edoxaban-d6 chemical structure

CAS: 1304701-57-2
Formula: C₂₄H₃₀ClN₇O₄S
MW: 554.1 g/mol

VQ-036894

Reference Standard

Edrophonium Chloride chemical structure

Edrophonium Chloride

CAS: 116-38-1
Formula: C₁₀H₁₆ClNO
MW: 201.69 g/mol

VQ-030385

Reference Standard

Efaproxiral chemical structure

CAS: 131179-95-8
Formula: C₂₀H₂₃NO₄
MW: 341.4 g/mol

VQ-051522

Reference Standard

Efatutazone chemical structure

CAS: 223132-37-4
Formula: C₂₇H₂₆N₄O₄S
MW: 502.6 g/mol

VQ-051463

Reference Standard

Efavirenz chemical structure

CAS: 154598-52-4
Formula: C₁₄H₉ClF₃NO₂
MW: 315.67 g/mol

VQ-030386

Reference Standard

Efavirenz Amino Alcohol Ethyl Carbamate chemical structure

Efavirenz Amino Alcohol Ethyl Carbamate

CAS: 211563-41-6
Formula: C₁₆H₁₅ClF₃NO₃
MW: 361.74 g/mol

VQ-021215

Reference Standard

Efavirenz Amino Alcohol Methyl Carbamate chemical structure

Efavirenz Amino Alcohol Methyl Carbamate

CAS: 211563-40-5
Formula: C₁₅H₁₃ClF₃NO₃
MW: 347.71 g/mol

VQ-021213

Reference Standard

Efavirenz Aminoalcohol Bis(ethoxycarbonyl) chemical structure

Efavirenz Aminoalcohol Bis(ethoxycarbonyl)

CAS: 2733280-20-9
Formula: C₁₉H₁₉ClF₃NO₅
MW: 433.8 g/mol

VQ-030389

Reference Standard

Efavirenz Benzoylaminoalcohol Impurity chemical structure

Efavirenz Benzoylaminoalcohol Impurity

CAS: 1189491-03-9
Formula: C₂₁H₁₇ClF₃NO₃
MW: 423.8 g/mol

VQ-022494

Reference Standard

Efavirenz Cyclobutenylindole Analog chemical structure

Efavirenz Cyclobutenylindole Analog

CAS: 2177283-35-9
Formula: C₁₆H₁₃ClF₃NO₂
MW: 343.73 g/mol

VQ-030388

Reference Standard

Efavirenz Descarbonyl Benzyl impurity chemical structure

Efavirenz Descarbonyl Benzyl impurity

CAS: 173676-60-3
Formula: C₂₁H₁₉ClF₃NO₂
MW: 409.8 g/mol

VQ-025484

Reference Standard

Efavirenz IP Impurity J chemical structure

Efavirenz IP Impurity J

CAS: 209414-26-6
Formula: C₂₁H₁₇ClF₃NO₂
MW: 407.8 g/mol

VQ-025485

Reference Standard

Efavirenz Pent-3-ene-1-yne(cis/trans Mixture) chemical structure

Efavirenz Pent-3-ene-1-yne(cis/trans Mixture)

CAS: 2125704-30-3
Formula: C₁₄H₉ClF₃NO₂
MW: 315.67 g/mol

VQ-030387

Reference Standard

Efavirenz Pentyne Analog chemical structure

Efavirenz Pentyne Analog

CAS: 205755-86-8
Formula: C₁₄H₁₁ClF₃NO₂
MW: 317.69 g/mol

VQ-025486

Reference Standard

Efavirenz USP Related Compound A chemical structure

Efavirenz USP Related Compound A

CAS: 209414-27-7
Formula: C₁₃H₁₁ClF₃NO
MW: 289.68 g/mol

VQ-021211

Reference Standard

Efavirenz USP Related Compound B chemical structure

Efavirenz USP Related Compound B

CAS: 440124-96-9
Formula: C₁₄H₁₁ClF₃NO₂
MW: 317.69 g/mol

VQ-022490

Reference Standard

Efavirenz USP Related Compound C chemical structure

Efavirenz USP Related Compound C

CAS: 391860-73-4
Formula: C₁₃H₉ClF₃N
MW: 271.66 g/mol

VQ-021212

Reference Standard

Efavirenz-13C6 chemical structure

CAS: 1261394-62-0
Formula: C₁₄H₉ClF₃NO₂
MW: 321.63 g/mol

VQ-036898

Reference Standard

Efavirenz-d5 chemical structure

CAS: 1132642-95-5
Formula: C₁₄H₉ClF₃NO₂
MW: 320.7 g/mol

VQ-036899

Reference Standard

Efinaconazole chemical structure

CAS: 164650-44-6
Formula: C₁₈H₂₂F₂N₄O
MW: 348.4 g/mol

VQ-025487

Reference Standard

Efinaconazole-N-oxide chemical structure

Efinaconazole-N-oxide

CAS: 2055038-63-4
Formula: C₁₈H₂₂F₂N₄O₂
MW: 364.4 g/mol

VQ-025494

Reference Standard

Efinaconazole(2R,3R)Regiamer chemical structure

Efinaconazole(2R,3R)Regiamer

CAS: 2122222-10-8
Formula: C₁₈H₂₂F₂N₄O
MW: 348.4 g/mol

VQ-036901

Reference Standard

Eflornithine Hydrochloride chemical structure

Eflornithine Hydrochloride

CAS: 68278-23-9
Formula: C₆H₁₃ClF₂N₂O₂
MW: 218.63 g/mol

VQ-036910

Reference Standard

Eflornithine Hydrochloride Monohydrate chemical structure

Eflornithine Hydrochloride Monohydrate

CAS: 96020-91-6
Formula: C₆H₁₅ClF₂N₂O₃
MW: 236.64 g/mol

VQ-048154

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