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
![(-)-7-[(5,7-Difluoro-3,4-dihydro-2H-1-benzopyran-4-yl)oxy]-2-methyl-1H-benzimidazole-5-carboxylic Acid chemical structure](/media/structures/ISYSUUMRBSNENL-UHFFFAOYSA-N.svg)
(-)-7-[(5,7-Difluoro-3,4-dihydro-2H-1-benzopyran-4-yl)oxy]-2-methyl-1H-benzimidazole-5-carboxylic Acid
- CAS
- 942196-03-4
- Formula
- C18H14F2N2O4
- MW
- 360.3 g/mol
VQ-034077
((((3R,6S)-6-Carbamoylpiperidin-3-yl)amino)oxy)sulfonic acid, sodium salt
- CAS
- 2731022-13-0
- Formula
- C6H12N3NaO5S
- MW
- 261.23 g/mol
VQ-029309
![((1R,2R)-2-((4-(Benzo[d]isothiazol-3-yl)piperazin-1-yl)methyl)cyclohexyl)methanamine chemical structure](/media/structures/ISNHCWHFMIPSEZ-HOTGVXAUSA-N.svg)
((1R,2R)-2-((4-(Benzo[d]isothiazol-3-yl)piperazin-1-yl)methyl)cyclohexyl)methanamine
- CAS
- 1260138-03-1
- Formula
- C19H28N4S
- MW
- 344.5 g/mol
VQ-026540
![((1R,2R)-Cyclohexane-1,2-diyl)bis(methylene) bis(4-(benzo[d]isothiazol-3-yl)piperazine-1-carboxylate) chemical structure](/media/structures/BAGKUUMMYLYQEV-ZEQRLZLVSA-N.svg)
((1R,2R)-Cyclohexane-1,2-diyl)bis(methylene) bis(4-(benzo[d]isothiazol-3-yl)piperazine-1-carboxylate)
- CAS
- 1807983-61-4
- Formula
- C32H38N6O4S2
- MW
- 634.8 g/mol
VQ-038199
((1R,2S)-2-(3-Fluorophenyl)-2-((tosyloxy)methyl)cyclopropyl)methyl acetate
- CAS
- 1450904-92-3
- Formula
- C20H21FO5S
- MW
- 392.4 g/mol
VQ-037924
((1R,3S)-3-(2-Amino-6-chloro-9H-purin-9-yl)cyclopentyl)methanol
- CAS
- 2022943-79-7
- Formula
- C11H14ClN5O
- MW
- 267.71 g/mol
VQ-024101
![((2'-Cyano-[1,1'-biphenyl]-4-yl)methyl)-L-valine chemical structure](/media/structures/ACKDVZDXBQHGKY-SFHVURJKSA-N.svg)
((2'-Cyano-[1,1'-biphenyl]-4-yl)methyl)-L-valine
- CAS
- 1071286-94-6
- Formula
- C19H20N2O2
- MW
- 308.4 g/mol
VQ-042808
((2R,3R,4R,5R)-3-(Benzoyloxy)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-fluoro-4-methyltetrahydrofuran-2-yl)methyl Benzoate
- CAS
- 863329-65-1
- Formula
- C24H21FN2O7
- MW
- 468.4 g/mol
VQ-028071
((2R,3R,4R)-3-(Benzoyloxy)-4-fluoro-4-methyl-5-oxotetrahydrofuran-2-yl)methyl Benzoate
- CAS
- 874638-80-9
- Formula
- C20H17FO6
- MW
- 372.3 g/mol
VQ-033898
((2R,3R,4R)-3-(Benzoyloxy)-5-chloro-4-fluoro-4-Methyltetrahydrofuran-2-yl)Methyl benzoate
- CAS
- 1621160-31-3
- Formula
- C20H18ClFO5
- MW
- 392.8 g/mol
VQ-042217
About API Impurities
Vaqora Chemicals lists 1942 api impurities within our Impurities & Reference Standards range, including Tenoxicam, Desloratadine, (R)-Zopiclone, (S)-Ibrutinib. Each listing shows identifiers such as CAS number, formula and molecular weight (1464 products have a CAS number), helping chemists and buyers match the exact substance.
Common grades in this range include Reference Standard. Products are supplied mainly as solid, powder, packed to suit laboratory, pilot and production quantities. If you need a different pack, purity or specification, ask us for a custom quotation.
Typical users include research & academia, pharmaceuticals teams. Add products to your quote basket to request prices, lead times and documentation for several items at once. We ship from India worldwide by sea, air and express courier.
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Frequently asked questions
How many api impurities do you supply?
We currently list 1942 api impurities, such as Tenoxicam, Desloratadine, (R)-Zopiclone. We can also source or custom-synthesise items that are not listed.
Do api impurities come with a COA and SDS?
Yes. Each lot is supplied with a batch Certificate of Analysis and a 16-section GHS Safety Data Sheet. Typical COAs can be shared before you order.
Can you export api impurities to my country?
Yes. We ship worldwide by sea freight, air cargo and express courier, with export documentation, and pack hazardous materials to IATA/IMDG dangerous-goods rules.
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.