5-Methylbenzo[c]isothiazole CAS 56910-95-3
| CAS No. | 56910-95-3 |
| Molecular Formula | C8H7NS |
| Molecular Weight | 149.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Methylbenzo[c]isothiazole (CAS 56910-95-3) is a high-purity analytical reference standard with the molecular formula C8H7NS and a molecular weight of 149.21 g/mol.
The molecular framework of 5-Methylbenzo[c]isothiazole (C8H7NS) is characterized by a nitrogen-containing heterocyclic scaffold, a nitrile group, sulfur-containing functionality. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C8H7NS |
| Molecular Weight | 149.21 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Methylbenzo Standards
- 4-Methylbenzo[d]isothiazole (CAS 1246021-75-9)
- 7-Methylbenzo[d]isothiazole (CAS 1352891-75-8)
- 4-Methylbenzo[c]isothiazole (CAS 20728-41-0)
- 5-Methylbenzo[d]isothiazole (CAS 41918-06-3)
- 6-Methylbenzo[d]thiazole (CAS 2942-15-6)
- 7-Methylbenzo[d]thiazole, 97% (CAS 3048-47-3)
- 2-Methylbenzo[d]oxazol-6-ol (CAS 5078-07-9)
- 3-Methylbenzo[d]isoxazol-5-ol (CAS 214760-36-8)
Recommended Standards
- 5-methyl-1,3-benzothiazole (CAS 2942-16-7)
- 5-Aminobenzo[b]thiophene (CAS 20532-28-9)
- 6-Aminobenzo[b]thiophene (CAS 5339-33-3)
- 5,6-Dihydro-4H-cyclopenta[b]thiophene-2-carbonitrile (CAS 874881-14-8)
- 2-(Difluoromethyl)-5-methoxy-3-(trifluoromethoxy)pyridine-4-carboxaldehyde (CAS 1806176-04-4)
- (R)-5,6-Difluoro-2,3-dihydrobenzofuran-3-amine (CAS 1272739-50-0)
- 2-((2,3-Dichlorobenzyl)(ethyl)amino)acetic acid (CAS 1353945-92-2)
- {4-chloropyrrolo[2,1-f][1,2,4]triazin-5-yl}methanol (CAS 1416440-56-6)
- N,N'-(naphthalene-1,4-diyl)bis(naphthalene-2-sulfonamide) (CAS 301315-40-2)
- Benidipine Impurity 36 (CAS 864356-11-6)
- (S)-1-Hydroxy-2,3-dihydro-1H-indene-4-carbonitrile (CAS 125225-26-5)
- piperazin-2-one hydrochloride (CAS 24123-06-6)
- 2,6-Dichloro-4-(dimethylamino)nicotinaldehyde (CAS 1823371-33-0)
- Semaglutide Impurity 75 (CAS CATO-C4X-2226175)
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