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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

2,3,7,8-Tetrachlorodibenzo-p-dioxin chemical structure

2,3,7,8-Tetrachlorodibenzo-p-dioxin

CAS: 1746-01-6
Formula: C₁₂H₄Cl₄O₂
MW: 322 g/mol

VQ-029395

Reference Standard

2,3,7,8-Tetrachlorodibenzofuran chemical structure

2,3,7,8-Tetrachlorodibenzofuran

CAS: 51207-31-9
Formula: C₁₂H₄Cl₄O
MW: 306 g/mol

VQ-027085

Reference Standard

2,3,9,10,11-Pentamethoxy-5,8,13,13a-tetrahydro-6H-isoquinolino[3,2-a]isoquinoline chemical structure

2,3,9,10,11-Pentamethoxy-5,8,13,13a-tetrahydro-6H-isoquinolino[3,2-a]isoquinoline

CAS: 7668-86-2
Formula: C₂₂H₂₇NO₅
MW: 385.5 g/mol

VQ-044431

Reference Standard

2,4 Dimethyl Ropivacaine-S-Isomer chemical structure

2,4 Dimethyl Ropivacaine-S-Isomer

CAS: 2501271-52-7
Formula: C₁₇H₂₆N₂O
MW: 274.4 g/mol

VQ-045113

Reference Standard

2,4-Bis(2,2,2-Trifluoroethoxy)benzoic Acid chemical structure

2,4-Bis(2,2,2-Trifluoroethoxy)benzoic Acid

CAS: 35480-51-4
Formula: C₁₁H₈F₆O₄
MW: 318.17 g/mol

VQ-039791

Reference Standard

2,4-Di-tert-butyl-5-nitrophenol chemical structure

2,4-Di-tert-butyl-5-nitrophenol

CAS: 873055-57-3
Formula: C₁₄H₂₁NO₃
MW: 251.32 g/mol

VQ-031344

Reference Standard

2,4-Di-tert-butyl-6-nitrophenol chemical structure

2,4-Di-tert-butyl-6-nitrophenol

CAS: 20039-94-5
Formula: C₁₄H₂₁NO₃
MW: 251.32 g/mol

VQ-031343

Reference Standard

2,4-Di-tert-butyl-6-nitrophenyl methyl carbonate chemical structure

2,4-Di-tert-butyl-6-nitrophenyl methyl carbonate

CAS: 873055-56-2
Formula: C₁₆H₂₃NO₅
MW: 309.36 g/mol

VQ-037792

Reference Standard

2,4-Di-tert-butylphenol chemical structure

2,4-Di-tert-butylphenol

CAS: 96-76-4
Formula: C₁₄H₂₂O
MW: 206.32 g/mol

VQ-027222

Reference Standard

2,4-Diamino-3-fluoro-5-nitrobenzoic Acid chemical structure

2,4-Diamino-3-fluoro-5-nitrobenzoic Acid

CAS: 918321-31-0
Formula: C₇H₆FN₃O₄
MW: 215.14 g/mol

VQ-029446

Reference Standard

2,4-Diamino-6-chloromethylpteridine hydrochloride chemical structure

2,4-Diamino-6-chloromethylpteridine hydrochloride

CAS: 82778-08-3
Formula: C₇H₈Cl₂N₆
MW: 247.08 g/mol

VQ-030860

Reference Standard

2,4-Diaminopteridine chemical structure

2,4-Diaminopteridine

CAS: 1127-93-1
Formula: C₆H₆N₆
MW: 162.15 g/mol

VQ-038360

Reference Standard

2,4-Diaminopteridine-6-carboxylic acid chemical structure

2,4-Diaminopteridine-6-carboxylic acid

CAS: 716-74-5
Formula: C₇H₆N₆O₂
MW: 206.16 g/mol

VQ-048454

Reference Standard

2,4-Diaminopyridine chemical structure

2,4-Diaminopyridine

CAS: 461-88-1
Formula: C₅H₇N₃
MW: 109.13 g/mol

VQ-038419

Reference Standard

2,4-Dibromo-5-(trifluoromethyl)aniline chemical structure

2,4-Dibromo-5-(trifluoromethyl)aniline

CAS: 24115-24-0
Formula: C₇H₄Br₂F₃N
MW: 318.92 g/mol

VQ-039386

Reference Standard

2,4-Dichloro Vilanterol chemical structure

2,4-Dichloro Vilanterol

CAS: 503068-65-3
Formula: C₂₄H₃₃Cl₂NO₅
MW: 486.4 g/mol

VQ-034604

Reference Standard

2,4-Dichloro-5-chlorosulfonyl-benzoic Acid chemical structure

2,4-Dichloro-5-chlorosulfonyl-benzoic Acid

CAS: 3740-18-9
Formula: C₇H₃Cl₃O₄S
MW: 289.5 g/mol

VQ-025938

Reference Standard

2,4-Dichloro-5-fluorobenzoyl chloride chemical structure

2,4-Dichloro-5-fluorobenzoyl chloride

CAS: 86393-34-2
Formula: C₇H₂Cl₃FO
MW: 227.4 g/mol

VQ-036337

Reference Standard

2,4-Dichloro-5-fluoropyrimidine chemical structure

2,4-Dichloro-5-fluoropyrimidine

CAS: 2927-71-1
Formula: C₄HCl₂FN₂
MW: 166.97 g/mol

VQ-030775

Reference Standard

2,4-Dichloro-5-methoxyaniline chemical structure

2,4-Dichloro-5-methoxyaniline

CAS: 98446-49-2
Formula: C₇H₇Cl₂NO
MW: 192.04 g/mol

VQ-029483

Reference Standard

2,4-Dichloro-5-sulfobenzoic Acid chemical structure

2,4-Dichloro-5-sulfobenzoic Acid

CAS: 41332-59-6
Formula: C₇H₄Cl₂O₅S
MW: 271.07 g/mol

VQ-025939

Reference Standard

2,4-Dichloro-6,7-bis(2-methoxyethoxy)quinazoline chemical structure

2,4-Dichloro-6,7-bis(2-methoxyethoxy)quinazoline

CAS: 1710372-46-5
Formula: C₁₄H₁₆Cl₂N₂O₄
MW: 347.2 g/mol

VQ-025586

Reference Standard

2,4-Dichloro-7H-Pyrrolo (2,3-d)Pyrimidine chemical structure

2,4-Dichloro-7H-Pyrrolo (2,3-d)Pyrimidine

CAS: 90213-66-4
Formula: C₆H₃Cl₂N₃
MW: 188.01 g/mol

VQ-028421

Reference Standard

2,4-Dichlorobenzoyl Chloride chemical structure

2,4-Dichlorobenzoyl Chloride

CAS: 89-75-8
Formula: C₇H₃Cl₃O
MW: 209.5 g/mol

VQ-039363

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