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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

Cholesterol 5alpha,6alpha-Epoxide chemical structure

Cholesterol 5alpha,6alpha-Epoxide

CAS: 1250-95-9
Formula: C₂₇H₄₆O₂
MW: 402.7 g/mol

VQ-029781

Reference Standard

Cholesterol 5beta,6beta-Epoxide chemical structure

Cholesterol 5beta,6beta-Epoxide

CAS: 4025-59-6
Formula: C₂₇H₄₆O₂
MW: 402.7 g/mol

VQ-029780

Reference Standard

Cholesterol Benzoate chemical structure

Cholesterol Benzoate

CAS: 604-32-0
Formula: C₃₄H₅₀O₂
MW: 490.8 g/mol

VQ-032720

Reference Standard

Cholesterol Caprylate chemical structure

Cholesterol Caprylate

CAS: 1182-42-9
Formula: C₃₅H₆₀O₂
MW: 512.8 g/mol

VQ-024957

Reference Standard

Cholesterol Impurity 11 chemical structure

Cholesterol Impurity 11

CAS: 14214-69-8
Formula: C₂₇H₄₄O
MW: 384.6 g/mol

In stock

Reference Standard

Cholesterol Impurity 9

Cholesterol Impurity 9

CAS: 63908-96-3
Formula: C₂₇H₄₆O₂
MW: 402.7 g/mol

VQ-047779

Reference Standard

Cholesterol, cis-9-hexadecenoate chemical structure

Cholesterol, cis-9-hexadecenoate

CAS: 16711-66-3
Formula: C₄₃H₇₄O₂
MW: 623 g/mol

VQ-044383

Reference Standard

Cholic Acid Ethyl Ester chemical structure

Cholic Acid Ethyl Ester

CAS: 47676-48-2
Formula: C₂₆H₄₄O₅
MW: 436.6 g/mol

VQ-031017

Reference Standard

Cholic Acid Impurity (3-alpha-Hydroxy-12-Oxo-5-beta-Cholanoic Acid) chemical structure

Cholic Acid Impurity (3-alpha-Hydroxy-12-Oxo-5-beta-Cholanoic Acid)

CAS: 5130-29-0
Formula: C₂₄H₃₈O₄
MW: 390.6 g/mol

VQ-044987

Reference Standard

Choline Fenofibrate chemical structure

Choline Fenofibrate

CAS: 856676-23-8
Formula: C₂₂H₂₈ClNO₅
MW: 421.9 g/mol

VQ-025759

Reference Standard

Chromozym Try chemical structure

CAS: 86170-43-6
Formula: C₂₉H₄₀N₈O₉
MW: 644.7 g/mol

VQ-050109

Reference Standard

Ciclopirox Ethanolamine chemical structure

Ciclopirox Ethanolamine

CAS: 41621-49-2
Formula: C₁₄H₂₄N₂O₃
MW: 268.35 g/mol

VQ-024960

Reference Standard

Cidofovir diol analog chemical structure

Cidofovir diol analog

CAS: 55559-70-1
Formula: C₇H₁₁N₃O₃
MW: 185.18 g/mol

VQ-029788

Reference Standard

Cidofovir Related Compound B chemical structure

Cidofovir Related Compound B

CAS: 120362-35-8
Formula: C₁₂H₂₂N₃O₆P
MW: 335.29 g/mol

VQ-029787

Reference Standard

Cidofovir uracil analog chemical structure

Cidofovir uracil analog

CAS: 116558-96-4
Formula: C₈H₁₃N₂O₇P
MW: 280.17 g/mol

VQ-022172

Reference Standard

Cilastatin Ammonium chemical structure

Cilastatin Ammonium

CAS: 877674-82-3
Formula: C₁₆H₂₉N₃O₅S
MW: 375.5 g/mol

VQ-036295

Reference Standard

Cilastatin E-Isomer chemical structure

Cilastatin E-Isomer

CAS: 1174657-12-5
Formula: C₁₆H₂₆N₂O₅S
MW: 358.5 g/mol

VQ-044952

Reference Standard

Cilostazol Dimer

Cilostazol Dimer

CAS: 2115698-98-9
Formula: C₄₀H₅₂N₁₀O₄
MW: 736.92 g/mol

VQ-036302

Reference Standard

Cinacalcet 5,6-Dihydro Racemate Base chemical structure

Cinacalcet 5,6-Dihydro Racemate Base

CAS: 802918-47-4
Formula: C₂₂H₂₄F₃N
MW: 359.4 g/mol

VQ-029814

Reference Standard

Cinacalcet 5,6-Dihydro Racemate Hydrochloride chemical structure

Cinacalcet 5,6-Dihydro Racemate Hydrochloride

CAS: 2514708-62-2
Formula: C₂₂H₂₅ClF₃N
MW: 395.9 g/mol

VQ-036320

Reference Standard

Cinacalcet 7,8-Dihydro Racemate Base chemical structure

Cinacalcet 7,8-Dihydro Racemate Base

CAS: 802918-46-3
Formula: C₂₂H₂₄F₃N
MW: 359.4 g/mol

VQ-029809

Reference Standard

Cinacalcet Impurity 31 chemical structure

Cinacalcet Impurity 31

CAS: 1034094-54-6
Formula: C₁₀H₉F₃O
MW: 202.17 g/mol

In stock

Reference Standard

Cinacalcet Impurity 7 chemical structure

Cinacalcet Impurity 7

CAS: 21172-43-0
Formula: C₁₁H₁₃F₃O₃S
MW: 282.28 g/mol

VQ-021161

Reference Standard

Cinacalcet Impurity A chemical structure

Cinacalcet Impurity A

CAS: 3886-70-2
Formula: C₁₂H₁₃N
MW: 171.24 g/mol

VQ-004640

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