3-(Isothiazol-5-yl)phenol CAS 904085-96-7
| CAS No. | 904085-96-7 |
| Molecular Formula | C9H7NOS |
| Molecular Weight | 177.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
3-(Isothiazol-5-yl)phenol (CAS 904085-96-7), molecular formula C9H7NOS and molecular weight 177.22 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 3-(Isothiazol-5-yl)phenol (C9H7NOS) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage. 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO manufactures 3-(Isothiazol-5-yl)phenol 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 | C9H7NOS |
| Molecular Weight | 177.22 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Isothiazol Standards
- 4-(Isothiazol-5-yl)phenol (CAS 68535-60-4)
- 3-(Isothiazol-5-yl)aniline (CAS 904086-00-6)
- 4-(Isothiazol-5-yl)aniline (CAS 904085-99-0)
- 2-(Isothiazol-3-yl)-2-methylpropanoic acid (CAS 1779983-34-4)
- 4-(Isothiazol-4-yl)-2-methylbut-3-yn-2-ol (CAS 1310558-46-3)
- Methyl 2-(isothiazol-4-yl)acetate (CAS 10271-83-7)
- 2-(Isothiazol-3-yl)propanoic acid (CAS 1500343-54-3)
- 3-(Isothiazol-5-yl)benzoic acid (CAS 904085-98-9)
Recommended Standards
- 3-(4-Fluorophenyl)-N,N-dimethylprop-2-yn-1-amine (CAS 860003-19-6)
- 3-(Thiazol-4-yl)phenol (CAS 35582-21-9)
- 3-(3-Fluorobicyclo[1.1.1]pentan-1-yl)aniline (CAS 2209086-58-6)
- 3-[(2-sulfanylethyl)carbamoyl]propanoic acid (CAS 59200-46-3)
- 2-(Chloromethyl)-4,5-dimethyl-1h-imidazole hydrochloride (CAS 1390654-37-1)
- 2-Ethyl-1H-pyrrol-1-amine (CAS 126356-14-7)
- 6-Methyl-3-(4-(methylthio)phenyl)-1,3-dihydrofuro[3,4-c]pyridin-7-ol (CAS 96908-97-3)
- 2-(3-Methylphenyl)malondialdehyde (CAS 849021-24-5)
- N-(Oxan-4-yl)aminosulfonamide (CAS 1566818-36-7)
- cis-Ethyl 6-aminocyclohex-3-enecarboxylate hydrochloride (CAS 57266-61-2)
- 5-Methyl-1-[tris(1-methylethyl)silyl]-1H-pyrrolo[2,3-b]pyridine (CAS 918523-66-7)
- [(2S)-2-Methyloxiran-2-yl]methanol (CAS 86884-90-4)
- Lenvatinib Impurity 76 (CAS CATO-C4X-114076)
- Insulin Degludec Impurity 1 (CAS 843666-26-2)
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