Skip to content

Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

14,098products

1,516in stock

COA + SDSwith every lot

Reference Standard

3-Benzyl-5-(trifluoromethyl)-3,4-dihydro-2H-benzo[e][1,2,4]thiadiazine-7-sulfonamide 1,1-dioxide

3-Benzyl-5-(trifluoromethyl)-3,4-dihydro-2H-benzo[e][1,2,4]thiadiazine-7-sulfonamide 1,1-dioxide

CAS: 2725437-59-0
Formula: C₁₅H₁₄F₃N₃O₄S₂
MW: 421.41 g/mol

VQ-021763

Reference Standard

3-Benzyl-6-bromo-2-methoxyquinoline chemical structure

3-Benzyl-6-bromo-2-methoxyquinoline

CAS: 654655-69-3
Formula: C₁₇H₁₄BrNO
MW: 328.2 g/mol

VQ-020911

Reference Standard

3-Benzyloxyaniline hydrochloride chemical structure

3-Benzyloxyaniline hydrochloride

CAS: 81499-33-4
Formula: C₁₃H₁₄ClNO
MW: 235.71 g/mol

VQ-035121

Reference Standard

3-Benzylphthalide chemical structure

3-Benzylphthalide

CAS: 7011-98-5
Formula: C₁₅H₁₂O₂
MW: 224.25 g/mol

VQ-040457

Reference Standard

3-Boc-amino-4-2, 4, 5-trifluorophenyl)butyric Acid chemical structure

3-Boc-amino-4-2, 4, 5-trifluorophenyl)butyric Acid

CAS: 1620129-74-9
Formula: C₁₅H₁₈F₃NO₄
MW: 333.3 g/mol

VQ-023769

Reference Standard

3-Bromo Midodrine chemical structure

3-Bromo Midodrine

CAS: 1797102-13-6
Formula: C₁₂H₁₇BrN₂O₄
MW: 333.18 g/mol

VQ-031888

Reference Standard

3-Bromo-1-(3-chloropyridin-2-yl)-N-(3,4-dichloro-2-methyl-6-(methylcarbamoyl)phenyl)-1H-pyrazole-5-carboxamide

3-Bromo-1-(3-chloropyridin-2-yl)-N-(3,4-dichloro-2-methyl-6-(methylcarbamoyl)phenyl)-1H-pyrazole-5-carboxamide

CAS: 2840171-34-6
Formula: C₁₈H₁₃BrCl₃N₅O₂
MW: 517.59 g/mol

VQ-027290

Reference Standard

3-Bromo-1-(3-chloropyridin-2-yl)-N-(4-formamido-2-methyl-6-(methylcarbamoyl)phenyl)-1H-pyrazole-5-carboxamide chemical structure

3-Bromo-1-(3-chloropyridin-2-yl)-N-(4-formamido-2-methyl-6-(methylcarbamoyl)phenyl)-1H-pyrazole-5-carboxamide

CAS: 2957882-50-5
Formula: C₁₉H₁₆BrClN₆O₃
MW: 491.7 g/mol

VQ-029949

Reference Standard

3-Bromo-1-(5-bromo-3-chloropyridin-2-yl)-N-(4-chloro-2-methyl-6-(methylcarbamoyl)phenyl)-1H-pyrazole-5-carboxamide chemical structure

3-Bromo-1-(5-bromo-3-chloropyridin-2-yl)-N-(4-chloro-2-methyl-6-(methylcarbamoyl)phenyl)-1H-pyrazole-5-carboxamide

CAS: 500011-53-0
Formula: C₁₈H₁₃Br₂Cl₂N₅O₂
MW: 562 g/mol

VQ-027303

Reference Standard

3-Bromo-1,3,4,5-tetrahydro-2H-benzo[b]azepin-2-one chemical structure

3-Bromo-1,3,4,5-tetrahydro-2H-benzo[b]azepin-2-one

CAS: 86499-96-9
Formula: C₁₀H₁₀BrNO
MW: 240.1 g/mol

VQ-044884

Reference Standard

3-Bromo-2-fluorobenzoic acid chemical structure

3-Bromo-2-fluorobenzoic acid

CAS: 161957-56-8
Formula: C₇H₄BrFO₂
MW: 219.01 g/mol

VQ-039908

Reference Standard

3-Bromo-3'-Chloropropiophenone

3-Bromo-3'-Chloropropiophenone

CAS: 517866-72-7
Formula: C₉H₈BrClO
MW: 247.52 g/mol

VQ-029552

Reference Standard

3-Bromo-5-(2-pyridyl)-1-phenyl-1,2-dihydropyridin-2-one chemical structure

3-Bromo-5-(2-pyridyl)-1-phenyl-1,2-dihydropyridin-2-one

CAS: 381248-06-2
Formula: C₁₆H₁₁BrN₂O
MW: 327.17 g/mol

VQ-023476

Reference Standard

3-Bromo-5-chloro-2-fluorobenzoic Acid chemical structure

3-Bromo-5-chloro-2-fluorobenzoic Acid

CAS: 1269232-93-0
Formula: C₇H₃BrClFO₂
MW: 253.45 g/mol

VQ-048213

Reference Standard

3-Bromo-5-chloropyridin-4-amine chemical structure

3-Bromo-5-chloropyridin-4-amine

CAS: 159783-78-5
Formula: C₅H₄BrClN₂
MW: 207.45 g/mol

VQ-027881

Reference Standard

3-Bromo-5-nitrobenzotrifluoride chemical structure

3-Bromo-5-nitrobenzotrifluoride

CAS: 630125-49-4
Formula: C₇H₃BrF₃NO₂
MW: 270 g/mol

VQ-027253

Reference Standard

3-Bromo-5H-pyrrolo[2,3-b]pyrazine chemical structure

3-Bromo-5H-pyrrolo[2,3-b]pyrazine

CAS: 1260665-49-3
Formula: C₆H₄BrN₃
MW: 198.02 g/mol

VQ-027198

Reference Standard

3-Bromo-L-thyroxine chemical structure

3-Bromo-L-thyroxine

CAS: 1798894-90-2
Formula: C₁₅H₁₁BrI₃NO₄
MW: 729.87 g/mol

VQ-048882

Reference Standard

3-Bromo-N-(3,4-dimethoxyphenethyl)-N-methylpropan-1-amine chemical structure

3-Bromo-N-(3,4-dimethoxyphenethyl)-N-methylpropan-1-amine

CAS: 66618-12-0
Formula: C₁₄H₂₂BrNO₂
MW: 316.23 g/mol

VQ-044591

Reference Standard

3-Bromo-N,N-dimethylpropan-1-amine Hydrobromide chemical structure

3-Bromo-N,N-dimethylpropan-1-amine Hydrobromide

CAS: 5845-30-7
Formula: C₅H₁₃Br₂N
MW: 246.97 g/mol

VQ-034757

Reference Standard

3-Bromo-vortioxetine Hydrobromide chemical structure

3-Bromo-vortioxetine Hydrobromide

CAS: 2725536-51-4
Formula: C₁₈H₂₂Br₂N₂S
MW: 458.3 g/mol

VQ-042946

Reference Standard

3-Bromonitrobenzene chemical structure

3-Bromonitrobenzene

CAS: 585-79-5
Formula: C₆H₄BrNO₂
MW: 202.01 g/mol

VQ-019539

Reference Standard

3-Carbamoyl-1-(4-methoxyphenyl)-4-(2-(4-(2-oxopiperidin-1-yl)phenylamino)ethyl)-1H-pyrazole-5-carboxylic Acid chemical structure

3-Carbamoyl-1-(4-methoxyphenyl)-4-(2-(4-(2-oxopiperidin-1-yl)phenylamino)ethyl)-1H-pyrazole-5-carboxylic Acid

CAS: 2206825-81-0
Formula: C₂₅H₂₇N₅O₅
MW: 477.5 g/mol

VQ-024315

Reference Standard

3-Carbethoxy-2-piperidone chemical structure

3-Carbethoxy-2-piperidone

CAS: 3731-16-6
Formula: C₈H₁₃NO₃
MW: 171.19 g/mol

VQ-044368

Need a price, a spec or a custom compound?

Send us your list — product names or CAS numbers, grade, quantity and destination. Our team replies with a formal quotation, COA and lead time.

Request a quote Contact sales