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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

Olopatadine methanol chemical structure

Olopatadine methanol

CAS: 113835-76-0
Formula: C₂₁H₂₅NO₂
MW: 323.4 g/mol

VQ-032245

Reference Standard

Olopatadine Methyl Ester impurity chemical structure

Olopatadine Methyl Ester impurity

CAS: 113806-01-2
Formula: C₂₂H₂₅NO₃
MW: 351.4 g/mol

VQ-027005

Reference Standard

Olsalazine Sodium - Impurity C chemical structure

Olsalazine Sodium - Impurity C

CAS: 259151-72-9
Formula: C₁₃H₁₀N₂O₄
MW: 258.23 g/mol

VQ-027008

Reference Standard

Olsalazine Sodium - Impurity D chemical structure

Olsalazine Sodium - Impurity D

CAS: 93964-55-7
Formula: C₁₄H₉ClN₂O₅
MW: 320.68 g/mol

VQ-027009

Reference Standard

Omeprazole dibenzimidazole Impurity

Omeprazole dibenzimidazole Impurity

CAS: 2451927-89-0
Formula: C₁₇H₁₇N₃O₃
MW: 311.34 g/mol

VQ-038766

Reference Standard

Omeprazole Impurity 24

Omeprazole Impurity 24

CAS: 2451927-87-8
Formula: C₁₇H₁₇N₃O₂S
MW: 327.4 g/mol

VQ-038765

Reference Standard

Omeprazole Impurity 26 chemical structure

Omeprazole Impurity 26

CAS: 2451927-94-7
Formula: C₁₆H₁₇N₃O₂
MW: 283.32 g/mol

VQ-049318

Reference Standard

Omeprazole Impurity 27

Omeprazole Impurity 27

CAS: 2451927-95-8
Formula: C₁₆H₁₇N₃O₃
MW: 299.3 g/mol

VQ-049317

Reference Standard

Omeprazole Impurity 63 chemical structure

Omeprazole Impurity 63

CAS: 149367-83-9
Formula: C₈H₈N₂OS
MW: 180.23 g/mol

VQ-038768

Reference Standard

Omeprazole Impurity D chemical structure

Omeprazole Impurity D

CAS: 88546-55-8
Formula: C₁₇H₁₉N₃O₄S
MW: 361.4 g/mol

In stock

Reference Standard

Omeprazole Impurity E chemical structure

Omeprazole Impurity E

CAS: 176219-04-8
Formula: C₁₇H₁₉N₃O₄S
MW: 361.4 g/mol

In stock

Reference Standard

Omeprazole Impurity H chemical structure

Omeprazole Impurity H

CAS: 863029-89-4
Formula: C₁₆H₁₆ClN₃O₂S
MW: 349.8 g/mol

In stock

Reference Standard

Omeprazole N-Methyl 6-Methoxy Thiol Impurity chemical structure

Omeprazole N-Methyl 6-Methoxy Thiol Impurity

CAS: 1526768-06-8
Formula: C₉H₁₀N₂OS
MW: 194.26 g/mol

VQ-038761

Reference Standard

Omeprazole oxa impurity chemical structure

Omeprazole oxa impurity

CAS: 2451927-88-9
Formula: C₁₇H₁₉N₃O₃
MW: 313.35 g/mol

VQ-032267

Reference Standard

Omeprazole Pyridone Acid chemical structure

Omeprazole Pyridone Acid

CAS: 1227380-90-6
Formula: C₁₆H₁₅N₃O₄
MW: 313.31 g/mol

VQ-025617

Reference Standard

Omeprazole Sulfide N1-Methyl 5-Methoxy Analog

Omeprazole Sulfide N1-Methyl 5-Methoxy Analog

CAS: 2243644-60-0
Formula: C₁₈H₂₁N₃O₂S
MW: 343.4 g/mol

VQ-038769

Reference Standard

Open Ring Aztreonam chemical structure

Open Ring Aztreonam

CAS: 87500-74-1
Formula: C₁₃H₁₉N₅O₉S₂
MW: 453.5 g/mol

VQ-023396

Reference Standard

Open-Ring Desulfated Aztreonam chemical structure

Open-Ring Desulfated Aztreonam

CAS: 102586-36-7
Formula: C₁₃H₁₉N₅O₆S
MW: 373.39 g/mol

VQ-027233

Reference Standard

Opicapone Impurity 11 chemical structure

Opicapone Impurity 11

CAS: 874518-62-4
Formula: C₁₀H₁₀O₅
MW: 210.18 g/mol

VQ-049326

Reference Standard

Opipramol Dihydrochloride Allyl Impurity

Opipramol Dihydrochloride Allyl Impurity

CAS: 74074-19-4
Formula: C₁₇H₁₅N
MW: 233.3 g/mol

VQ-049328

Reference Standard

Opipramol Dihydrochloride Deschloro Impurity chemical structure

Opipramol Dihydrochloride Deschloro Impurity

CAS: 4346-38-7
Formula: C₂₁H₂₅N₃
MW: 319.4 g/mol

VQ-049329

Reference Standard

Opipramol Dihydrochloride Dimer Impurity chemical structure

Opipramol Dihydrochloride Dimer Impurity

CAS: 62035-55-6
Formula: C₃₁H₂₆N₂
MW: 426.5 g/mol

VQ-049327

Reference Standard

Orforglipron (R,R,R,R) Isomer

Orforglipron (R,R,R,R) Isomer

CAS: 3109326-79-3
Formula: C₄₈H₄₈F₂N₁₀O₅
MW: 882.96 g/mol

VQ-032276

Reference Standard

Orforglipron Impurity 14 chemical structure

Orforglipron Impurity 14

CAS: 2212021-82-2
Formula: C₂₉H₃₂N₄O₄
MW: 500.6 g/mol

VQ-049330

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