4-Nitrobenzo[d]isothiazole CAS 139037-03-9
| CAS No. | 139037-03-9 |
| Molecular Formula | C7H4N2O2S |
| Molecular Weight | 180.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4-Nitrobenzo[d]isothiazole (CAS 139037-03-9), a certified reference material (molecular formula C7H4N2O2S, MW 180.18 g/mol) for analytical method development and quality control.
Structurally, 4-Nitrobenzo[d]isothiazole (C7H4N2O2S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 180.18 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
CATO manufactures 4-Nitrobenzo[d]isothiazole under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C7H4N2O2S |
| Molecular Weight | 180.18 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Nitrobenzo Standards
- 2-Nitrobenzo[d]thiazole (CAS 23505-64-8)
- 4-Nitrobenzo[d]thiazole (CAS 2942-08-7)
- 5-Nitrobenzo[d]isothiazole (CAS 60768-66-3)
- 6-Nitrobenzo[c]isothiazole (CAS 20712-11-2)
- 6-Nitrobenzo[d]isothiazole (CAS 540493-14-9)
- 7-Nitrobenzo[d]thiazole (CAS 2942-05-4)
- 4-Nitrobenzo[c][1,2,5]oxadiazol-5-amine (CAS 18333-71-6)
- 5-Nitrobenzo[c][1,2,5]oxadiazol-4-amine (CAS 22250-46-0)
Recommended Standards
- (E)-3-(5-fluoro-2-methylphenyl)acrylic acid (CAS 1386504-01-3)
- Methyl 2-(2-fluorophenyl)acrylate (CAS 1402743-25-2)
- 2-(1,1-Dioxido-1,2,5-thiadiazolidin-2-yl)acetic acid (CAS 1368437-25-5)
- (1R,2R,3R,4S,5R,6S,7S,8S)-Methyl 4-fluorocubane-1-carboxylate (CAS 141046-54-0)
- (Z)-2,4-dimethoxy-1-(2-nitrovinyl)benzene (CAS 1891-10-7)
- 6-Bromo-2-(pyridin-3-yl)-3H-imidazo[4,5-b]pyridine (CAS 65147-90-2)
- 1-(4-Fluorophenyl)-6-oxo-1,6-dihydropyridine-3-carboxylic acid (CAS 1221423-61-5)
- 2-[(5-{[(4-Iodo-2-methylphenyl)amino]methyl}-4-phenyl-4H-1,2,4-triazol-3-yl)thio]acetohydrazide (CAS 1071296-21-3)
- Ethyl 5-chloro-2-fluoroisonicotinate (CAS 1214388-40-5)
- 4-[4-Bromo-2-(hydroxymethyl)phenoxy]-benzonitrile (CAS 1962929-90-3)
- 1,3-dimethylpyrazole-4-boronic acid (CAS 847818-68-2)
- N-(5-Amino-2-methoxyphenyl)-3,4,5-trimethoxybenzamide (CAS 926236-72-8)
- 5-[(tert-Butoxycarbonyl)amino]-2-fluorobenzoic acid (CAS 141940-32-1)
- Semaglutide impurity 73 (CAS CATO-C4X-222673)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com