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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

Cyamemazine Tartrate chemical structure

Cyamemazine Tartrate

CAS: 93841-82-8
Formula: C₂₃H₂₇N₃O₆S
MW: 473.5 g/mol

VQ-036457

Reference Standard

Cyanamide chemical structure

CAS: 420-04-2
Formula: CH₂N₂
MW: 42.04 g/mol

VQ-027216

Reference Standard

Cyanocobalamin Impurity D chemical structure

Cyanocobalamin Impurity D

CAS: 23388-02-5
Formula: C₆₃H₈₆CoN₁₄O₁₄P
MW: 1353.3 g/mol

VQ-025105

Reference Standard

Cyanocobalamin-a-carboxylic Acid chemical structure

Cyanocobalamin-a-carboxylic Acid

CAS: 121483-62-3
Formula: C₆₃H₈₇CoN₁₃O₁₅P
MW: 1356.3 g/mol

VQ-025104

Reference Standard

Cyanocobalamin-b-carboxylic Acid chemical structure

Cyanocobalamin-b-carboxylic Acid

CAS: 38218-77-8
Formula: C₆₃H₈₇CoN₁₃O₁₅P
MW: 1356.3 g/mol

VQ-029946

Reference Standard

Cyanocobalamin-c-carboxylic acid chemical structure

Cyanocobalamin-c-carboxylic acid

CAS: 38437-93-3
Formula: C₆₃H₈₈CoN₁₃O₁₅P-2
MW: 1357.4 g/mol

VQ-036462

Reference Standard

Cyanocobalamin-d-carboxylic Acid

Cyanocobalamin-d-carboxylic Acid

CAS: 38218-55-2
Formula: C₆₃H₈₇CoN₁₃O₁₅P
MW: 1356.35 g/mol

VQ-036461

Reference Standard

Cyanocobalamin-g-carboxylic acid

Cyanocobalamin-g-carboxylic acid

CAS: 58206-91-0
Formula: C₆₃H₈₇CoN₁₃O₁₅P
MW: 1356.35 g/mol

VQ-036463

Reference Standard

Cyanomethyl Mirabegron chemical structure

Cyanomethyl Mirabegron

CAS: 2416733-26-9
Formula: C₂₃H₂₅N₅O₂S
MW: 435.5 g/mol

VQ-035352

Reference Standard

Cyclic 17-(1,2-Ethanediyl Acetal) Androst-5-ene-3,17-dione chemical structure

Cyclic 17-(1,2-Ethanediyl Acetal) Androst-5-ene-3,17-dione

CAS: 14456-13-4
Formula: C₂₁H₃₀O₃
MW: 330.5 g/mol

VQ-043868

Reference Standard

Cyclic Oligomer 9 chemical structure

Cyclic Oligomer 9

CAS: 1394013-66-1
Formula: C₂₂H₂₈O₁₀
MW: 452.5 g/mol

VQ-040906

Reference Standard

Cyclic urea of Carbamazepine

Cyclic urea of Carbamazepine

CAS: 168922-00-7
Formula: C₁₅H₁₄N₂O
MW: 238.29 g/mol

VQ-036140

Reference Standard

Cyclo L-Arginine chemical structure

Cyclo L-Arginine

CAS: 28958-90-9
Formula: C₆H₁₁N₃O₂
MW: 157.17 g/mol

VQ-037892

Reference Standard

Cyclo RacArginine chemical structure

Cyclo RacArginine

CAS: 89531-99-7
Formula: C₆H₁₁N₃O₂
MW: 157.17 g/mol

VQ-037893

Reference Standard

Cyclo-(Pro-Gly) chemical structure

Cyclo-(Pro-Gly)

CAS: 19179-12-5
Formula: C₇H₁₀N₂O₂
MW: 154.17 g/mol

VQ-039651

Reference Standard

Cyclo-Gly-Pro chemical structure

CAS: 3705-27-9
Formula: C₇H₁₀N₂O₂
MW: 154.17 g/mol

VQ-039089

Reference Standard

Cyclo(-Ala-Gln) chemical structure

Cyclo(-Ala-Gln)

CAS: 268221-76-7
Formula: C₈H₁₃N₃O₃
MW: 199.21 g/mol

VQ-023384

Reference Standard

Cyclo(-Ala-Glu) chemical structure

Cyclo(-Ala-Glu)

CAS: 16364-36-6
Formula: C₈H₁₂N₂O₄
MW: 200.19 g/mol

VQ-021952

Reference Standard

Cyclo(L-Pro-L-Trp) chemical structure

Cyclo(L-Pro-L-Trp)

CAS: 38136-70-8
Formula: C₁₆H₁₇N₃O₂
MW: 283.32 g/mol

VQ-037039

Reference Standard

Cyclobenzaprine 10,11 epoxide chemical structure

Cyclobenzaprine 10,11 epoxide

CAS: 58256-08-9
Formula: C₂₀H₂₁NO
MW: 291.4 g/mol

VQ-022272

Reference Standard

Cyclobutane-1,1-dicarboxamide chemical structure

Cyclobutane-1,1-dicarboxamide

CAS: 33582-68-2
Formula: C₆H₁₀N₂O₂
MW: 142.16 g/mol

VQ-047413

Reference Standard

Cyclobutanecarboxylic acid chemical structure

Cyclobutanecarboxylic acid

CAS: 3721-95-7
Formula: C₅H₈O₂
MW: 100.12 g/mol

VQ-027236

Reference Standard

Cyclohex-3-enone chemical structure

Cyclohex-3-enone

CAS: 4096-34-8
Formula: C₆H₈O
MW: 96.13 g/mol

VQ-048491

Reference Standard

Cyclohexane-1,1-dicarbonitrile chemical structure

Cyclohexane-1,1-dicarbonitrile

CAS: 5222-53-7
Formula: C₈H₁₀N₂
MW: 134.18 g/mol

VQ-048495

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