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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

Anagrelide open ring methyl ester chemical structure

Anagrelide open ring methyl ester

CAS: 752151-24-9
Formula: C₁₁H₁₁Cl₂N₃O₂
MW: 288.13 g/mol

VQ-029159

Reference Standard

Anagrelide Related Compound B Hydrochloride chemical structure

Anagrelide Related Compound B Hydrochloride

CAS: 2203514-95-6
Formula: C₁₀H₁₀Cl₃N₃O₂
MW: 310.6 g/mol

VQ-029158

Reference Standard

Anagrelide Trichloro Derivative chemical structure

Anagrelide Trichloro Derivative

CAS: 1092352-99-2
Formula: C₁₀H₆Cl₃N₃O
MW: 290.5 g/mol

VQ-020807

Reference Standard

Anastrozole Diacid Impurity chemical structure

Anastrozole Diacid Impurity

CAS: 1338800-81-9
Formula: C₁₇H₂₁N₃O₄
MW: 331.4 g/mol

In stock

Reference Standard

Anastrozole Diamide Impurity chemical structure

Anastrozole Diamide Impurity

CAS: 120512-04-1
Formula: C₁₇H₂₃N₅O₂
MW: 329.4 g/mol

VQ-004386

Reference Standard

Anastrozole Formyl Impurity chemical structure

Anastrozole Formyl Impurity

CAS: 120511-89-9
Formula: C₁₅H₁₆N₂O
MW: 240.3 g/mol

VQ-028883

Reference Standard

Anastrozole Impurity 2 chemical structure

Anastrozole Impurity 2

CAS: 120512-36-9
Formula: C₁₂H₁₄BrN
MW: 252.15 g/mol

VQ-035735

Reference Standard

Anastrozole Impurity 3 chemical structure

Anastrozole Impurity 3

CAS: 120512-37-0
Formula: C₁₃H₁₄N₂
MW: 198.26 g/mol

VQ-035736

Reference Standard

Anastrozole Monoacid Monoamide Impurity chemical structure

Anastrozole Monoacid Monoamide Impurity

CAS: 2469244-33-3
Formula: C₁₇H₂₂N₄O₃
MW: 330.4 g/mol

VQ-004387

Reference Standard

Anastrozole Monoacid Mononitrile Impurity

Anastrozole Monoacid Mononitrile Impurity

CAS: 1338800-82-0
Formula: C₁₇H₂₀N₄O₂
MW: 312.37 g/mol

In stock

Reference Standard

Anastrozole Monoamide Mononitrile Impurity chemical structure

Anastrozole Monoamide Mononitrile Impurity

CAS: 120512-03-0
Formula: C₁₇H₂₁N₅O
MW: 311.4 g/mol

In stock

Reference Standard

Androst-4-ene-3,6,17-trione chemical structure

Androst-4-ene-3,6,17-trione

CAS: 2243-06-3
Formula: C₁₉H₂₄O₃
MW: 300.4 g/mol

VQ-034148

Reference Standard

Androst-5-ene-3-acetyl-17-ketal chemical structure

Androst-5-ene-3-acetyl-17-ketal

CAS: 17921-59-4
Formula: C₂₃H₃₄O₄
MW: 374.5 g/mol

VQ-035108

Reference Standard

Androst-5-ene-3,17-diol, 3,17-di-(2E)-2-hexenoate, (3β,17β)

Androst-5-ene-3,17-diol, 3,17-di-(2E)-2-hexenoate, (3β,17β)

CAS: 1372939-79-1
Formula: C₃₀H₄₄O₄
MW: 468.32 g/mol

VQ-044375

Reference Standard

Androst-5-ene-3,17-diol, 3,17-di-4-pentenoate

Androst-5-ene-3,17-diol, 3,17-di-4-pentenoate

CAS: 1372939-73-5
Formula: C₂₉H₄₂O₄
MW: 454.7 g/mol

VQ-044374

Reference Standard

Androsta-1,4,6-triene-3,17-dione chemical structure

Androsta-1,4,6-triene-3,17-dione

CAS: 633-35-2
Formula: C₁₉H₂₂O₂
MW: 282.4 g/mol

VQ-032453

Reference Standard

Androsta-3,5-dien-17-one chemical structure

Androsta-3,5-dien-17-one

CAS: 1912-63-6
Formula: C₁₉H₂₆O
MW: 270.4 g/mol

VQ-021384

Reference Standard

Androsta-3,5-dien-17-one, 3-(acetyloxy) chemical structure

Androsta-3,5-dien-17-one, 3-(acetyloxy)

CAS: 4968-05-2
Formula: C₂₁H₂₈O₃
MW: 328.4 g/mol

VQ-044524

Reference Standard

Androsta-3,5,16-trien-17-ol Trifluoromethanesulfonate chemical structure

Androsta-3,5,16-trien-17-ol Trifluoromethanesulfonate

CAS: 154229-36-4
Formula: C₂₀H₂₅F₃O₃S
MW: 402.5 g/mol

VQ-028984

Reference Standard

Androsta-4,8-diene-3,17-dione chemical structure

Androsta-4,8-diene-3,17-dione

CAS: 68539-12-8
Formula: C₁₉H₂₄O₂
MW: 284.4 g/mol

VQ-043533

Reference Standard

Androsta-4,8(14)-diene-3,17-dione chemical structure

Androsta-4,8(14)-diene-3,17-dione

CAS: 17305-49-6
Formula: C₁₉H₂₄O₂
MW: 284.4 g/mol

VQ-043589

Reference Standard

Androstanolone Heptanoate chemical structure

Androstanolone Heptanoate

CAS: 33776-88-4
Formula: C₂₆H₄₂O₃
MW: 402.6 g/mol

VQ-043591

Reference Standard

Androstenone Hydrazone chemical structure

Androstenone Hydrazone

CAS: 63015-10-1
Formula: C₁₉H₃₀N₂O
MW: 302.5 g/mol

VQ-028985

Reference Standard

Anecortave acetate chemical structure

Anecortave acetate

CAS: 7753-60-8
Formula: C₂₃H₃₀O₅
MW: 386.5 g/mol

VQ-022802

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