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Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

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Reference Standard

Erlotinib Lactam Impurity chemical structure

Erlotinib Lactam Impurity

CAS: 179688-29-0
Formula: C₁₄H₁₈N₂O₅
MW: 294.3 g/mol

In stock

Reference Standard

Erlotinib Nitro Impurity

Erlotinib Nitro Impurity

CAS: 1470063-79-6
Formula: C₁₆H₂₃NO₉
MW: 373.36 g/mol

In stock

Reference Standard

Erlotinib Related Compound A chemical structure

Erlotinib Related Compound A

CAS: 299912-59-7
Formula: C₂₅H₃₀ClN₃O₅
MW: 488 g/mol

VQ-037050

Reference Standard

Erlotinib-3-vinyl Hydrochloride chemical structure

Erlotinib-3-vinyl Hydrochloride

CAS: 1624294-38-7
Formula: C₂₂H₂₆ClN₃O₄
MW: 431.9 g/mol

VQ-030527

Reference Standard

Erlotonib Impurity 17 chemical structure

Erlotonib Impurity 17

CAS: 938185-06-9
Formula: C₁₆H₁₁N₃O₂
MW: 277.28 g/mol

In stock

Reference Standard

Erlotonib Impurity 17 (Hydrochloride) chemical structure

Erlotonib Impurity 17 (Hydrochloride)

CAS: 1034651-72-3
Formula: C₁₆H₁₂ClN₃O₂
MW: 313.74 g/mol

VQ-004927

Reference Standard

Ertapenem Dimer Ester Impurity chemical structure

Ertapenem Dimer Ester Impurity

CAS: 402955-38-8
Formula: C₄₄H₅₀N₆O₁₄S₂
MW: 951 g/mol

VQ-037060

Reference Standard

Ertapenem Dimer Form D Impurity chemical structure

Ertapenem Dimer Form D Impurity

CAS: 1199797-41-5
Formula: C₄₄H₅₀N₆O₁₄S₂
MW: 951 g/mol

VQ-025589

Reference Standard

Ertapenem Dimer III chemical structure

Ertapenem Dimer III

CAS: 1199797-42-6
Formula: C₄₄H₅₀N₆O₁₄S₂
MW: 951 g/mol

VQ-030532

Reference Standard

Ertapenem Impurity Pro-maba chemical structure

Ertapenem Impurity Pro-maba

CAS: 724700-26-9
Formula: C₁₂H₁₄N₂O₃
MW: 234.25 g/mol

VQ-025588

Reference Standard

Ertapenem N-Carbonyl Dimer Impurity chemical structure

Ertapenem N-Carbonyl Dimer Impurity

CAS: 1199797-43-7
Formula: C₄₄H₄₈N₆O₁₃S₂
MW: 933 g/mol

VQ-037059

Reference Standard

Ertapenem Oxazinone Impurity chemical structure

Ertapenem Oxazinone Impurity

CAS: 866186-68-7
Formula: C₂₃H₂₅N₃O₉S
MW: 519.5 g/mol

VQ-025590

Reference Standard

Ertapenem Ring Open Impurity chemical structure

Ertapenem Ring Open Impurity

CAS: 357154-27-9
Formula: C₂₂H₂₇N₃O₈S
MW: 493.5 g/mol

VQ-030531

Reference Standard

Ertugliflozin Des Hydroxy Impurity chemical structure

Ertugliflozin Des Hydroxy Impurity

CAS: 1528636-45-4
Formula: C₂₂H₂₅ClO₆
MW: 420.9 g/mol

VQ-044991

Reference Standard

Ertugliflozin Dimer Impurity chemical structure

Ertugliflozin Dimer Impurity

CAS: 1528739-05-0
Formula: C₄₄H₅₀Cl₂O₁₄
MW: 873.8 g/mol

VQ-044992

Reference Standard

Ertugliflozin L- pyroglutamic acid chemical structure

Ertugliflozin L- pyroglutamic acid

CAS: 1210344-83-4
Formula: C₂₇H₃₂ClNO₁₀
MW: 566 g/mol

VQ-037061

Reference Standard

Erucic Acid Methyl Ester chemical structure

Erucic Acid Methyl Ester

CAS: 1120-34-9
Formula: C₂₃H₄₄O₂
MW: 352.6 g/mol

VQ-039254

Reference Standard

erythro Hydro Bupropion chemical structure

erythro Hydro Bupropion

CAS: 99102-04-2
Formula: C₁₃H₂₀ClNO
MW: 241.76 g/mol

VQ-028859

Reference Standard

Erythro-β,3-Dihydroxy-DL-tyrosine chemical structure

Erythro-β,3-Dihydroxy-DL-tyrosine

CAS: 16322-99-9
Formula: C₉H₁₁NO₅
MW: 213.19 g/mol

VQ-025431

Reference Standard

Erythromycin - Impurity K chemical structure

Erythromycin - Impurity K

CAS: 33442-56-7
Formula: C₃₆H₆₅NO₁₂
MW: 703.9 g/mol

VQ-025602

Reference Standard

Erythromycin A 6,9-Imino Ether chemical structure

Erythromycin A 6,9-Imino Ether

CAS: 99290-97-8
Formula: C₃₇H₆₆N₂O₁₂
MW: 730.9 g/mol

VQ-022550

Reference Standard

Erythromycin A 9,11-Imino Ether chemical structure

Erythromycin A 9,11-Imino Ether

CAS: 161193-44-8
Formula: C₃₇H₆₆N₂O₁₂
MW: 730.9 g/mol

VQ-022553

Reference Standard

Erythromycin B chemical structure

CAS: 527-75-3
Formula: C₃₇H₆₇NO₁₂
MW: 717.9 g/mol

VQ-025596

Reference Standard

Erythromycin C chemical structure

CAS: 1675-02-1
Formula: C₃₆H₆₅NO₁₃
MW: 719.9 g/mol

VQ-022551

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