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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

Cyclopropyl(4-fluorophenyl)methanone chemical structure

Cyclopropyl(4-fluorophenyl)methanone

CAS: 772-31-6
Formula: C₁₀H₉FO
MW: 164.18 g/mol

VQ-031054

Reference Standard

Cyclopropyl(indolin-1-yl)methanone chemical structure

Cyclopropyl(indolin-1-yl)methanone

CAS: 293324-65-9
Formula: C₁₂H₁₃NO
MW: 187.24 g/mol

VQ-038730

Reference Standard

Cyclopropyldiaminopurine Abacavir chemical structure

Cyclopropyldiaminopurine Abacavir

CAS: 120503-69-7
Formula: C₈H₁₀N₆
MW: 190.21 g/mol

VQ-020702

Reference Standard

Cycloserine Diketopiperazine chemical structure

Cycloserine Diketopiperazine

CAS: 1204-99-5
Formula: C₆H₁₂N₄O₄
MW: 204.18 g/mol

VQ-022278

Reference Standard

Cyclosporin A, 6-[(2S,3R,4R,6E)-3-(acetyloxy)-4-methyl-2-(methylamino)-6,8-nonadienoic Acid] chemical structure

Cyclosporin A, 6-[(2S,3R,4R,6E)-3-(acetyloxy)-4-methyl-2-(methylamino)-6,8-nonadienoic Acid]

CAS: 515814-02-5
Formula: C₆₅H₁₁₃N₁₁O₁₃
MW: 1256.7 g/mol

VQ-036475

Reference Standard

Cyclosporin B chemical structure

CAS: 63775-95-1
Formula: C₆₁H₁₀₉N₁₁O₁₂
MW: 1188.6 g/mol

VQ-025118

Reference Standard

Cyclosporin C chemical structure

CAS: 59787-61-0
Formula: C₆₂H₁₁₁N₁₁O₁₃
MW: 1218.6 g/mol

VQ-025119

Reference Standard

Cyclosporin D chemical structure

CAS: 63775-96-2
Formula: C₆₃H₁₁₃N₁₁O₁₂
MW: 1216.6 g/mol

VQ-025120

Reference Standard

Cyclosporin E chemical structure

CAS: 63798-73-2
Formula: C₆₁H₁₀₉N₁₁O₁₂
MW: 1188.6 g/mol

VQ-025125

Reference Standard

Cyclosporin F chemical structure

CAS: 83574-28-1
Formula: C₆₂H₁₁₁N₁₁O₁₁
MW: 1186.6 g/mol

VQ-036476

Reference Standard

Cyclosporin G chemical structure

CAS: 74436-00-3
Formula: C₆₃H₁₁₃N₁₁O₁₂
MW: 1216.6 g/mol

VQ-025124

Reference Standard

Cyclosporin H chemical structure

CAS: 83602-39-5
Formula: C₆₂H₁₁₁N₁₁O₁₂
MW: 1202.6 g/mol

VQ-025121

Reference Standard

Cyclosporin L chemical structure

CAS: 108027-39-0
Formula: C₆₁H₁₀₉N₁₁O₁₂
MW: 1188.6 g/mol

VQ-025127

Reference Standard

Cyclosporin T chemical structure

CAS: 108027-44-7
Formula: C₆₁H₁₀₉N₁₁O₁₂
MW: 1188.6 g/mol

VQ-029962

Reference Standard

Cyclosporin U chemical structure

CAS: 108027-45-8
Formula: C₆₁H₁₀₉N₁₁O₁₂
MW: 1188.6 g/mol

VQ-025126

Reference Standard

Cyclosporin V chemical structure

CAS: 108027-46-9
Formula: C₆₃H₁₁₃N₁₁O₁₂
MW: 1216.6 g/mol

VQ-025129

Reference Standard

Cyclosporine A (Cyclosporine)

Cyclosporine A (Cyclosporine)

CAS: 122090-69-1
Formula: C₆₂H₁₁₁N₁₁O₁₂
MW: 1202.61 g/mol

VQ-047896

Reference Standard

Cyclosporine AM 1 chemical structure

Cyclosporine AM 1

CAS: 89270-28-0
Formula: C₆₂H₁₁₁N₁₁O₁₃
MW: 1218.6 g/mol

VQ-029963

Reference Standard

Cyclotris(1,4-butylene Terephthalate) chemical structure

Cyclotris(1,4-butylene Terephthalate)

CAS: 63440-94-8
Formula: C₃₆H₃₆O₁₂
MW: 660.7 g/mol

VQ-027143

Reference Standard

Cyheptamide chemical structure

CAS: 7199-29-3
Formula: C₁₆H₁₅NO
MW: 237.3 g/mol

VQ-043094

Reference Standard

Cynarine chemical structure

CAS: 30964-13-7
Formula: C₂₅H₂₄O₁₂
MW: 516.4 g/mol

VQ-032564

Reference Standard

Cyproheptadine Impurity 7

Cyproheptadine Impurity 7

CAS: 1344000-56-1
Formula: C₁₃H₂₅NO
MW: 211.3 g/mol

VQ-047899

Reference Standard

Cyproterone Acetate Dichloro 17-Hydroxy Impurity chemical structure

Cyproterone Acetate Dichloro 17-Hydroxy Impurity

CAS: 2271091-83-7
Formula: C₂₂H₂₈Cl₂O₃
MW: 411.4 g/mol

VQ-025136

Reference Standard

Cyproterone Acetate Impurity 7 chemical structure

Cyproterone Acetate Impurity 7

CAS: 2098-65-9
Formula: C₂₂H₂₈O₃
MW: 340.5 g/mol

VQ-047900

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