4-Chlorobenzo[d]thiazol-2(3H)-one CAS 39205-62-4
| CAS No. | 39205-62-4 |
| Molecular Formula | C7H4ClNOS |
| Molecular Weight | 185.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 4-Chlorobenzo[d]thiazol-2(3H)-one (CAS 39205-62-4), a certified reference material (molecular formula C7H4ClNOS, MW 185.63 g/mol) for analytical method development and quality control.
Structurally, 4-Chlorobenzo[d]thiazol-2(3H)-one (C7H4ClNOS) contains an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 185.63 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
Physical & Chemical Properties
| Molecular Formula | C7H4ClNOS |
| Molecular Weight | 185.63 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; 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.) | 1968 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Chlorobenzo Standards
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- 2-Chlorobenzo[d]oxazole-7-thiol (CAS 1804145-90-1)
- 2-Chlorobenzo[d]oxazole-5-thiol (CAS 1806392-03-9)
- 4-Chlorobenzo[c][1,2,5]thiadiazol-5-amine (CAS 30536-36-8)
- 5-Chlorobenzo[d]oxazole-2(3H)-thione (CAS 22876-19-3)
Recommended Standards
- 4-Chlorothieno[2,3-b]pyridine 7-oxide (CAS 25557-54-4)
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- 4-Chlorothieno[3,2-d]pyrimidin-6-amine (CAS 936354-32-4)
- 4-Amino-7-chloro-2,1,3-benzothiadiazole (CAS 51323-01-4)
- Tuberostemonine (CAS 6879-01-2)
- 1-(1H-Indol-3-ylcarbonyl)azetidine-3-carboxylic acid (CAS 1350988-89-4)
- (R)-3-(Pyrrolidin-2-yl)pyridine dihydrochloride (CAS 288247-82-5)
- Ethyl (3-cyanopyridin-2-yl)glycinate (CAS 125967-18-2)
- 2-[3-(Pyridin-4-yl)-1H-1,2,4-triazol-5-yl]acetohydrazide (CAS 1015605-16-9)
- (1S,4S,E)-4-((1R,3aS,7aR,E)-4-((E)-2-((3S,5R)-3,5-bis(tert-butyldimethylsilyloxy)-2-methylenecyclohexylidene)ethylidene)-7a-methyloctahydro-1H-inden-1-yl)-1-cyclopropylpent-2-en-1-ol (CAS 134523-61-8)
- (S)-2-ethylpyrrolidine-2-carboxylic acid hydrochloride (CAS 1431699-61-4)
- (R)-1-(Pyrazin-2-yl)ethan-1-amine dihydrochloride (CAS 1955474-33-5)
- 3-(2-Ethylphenyl)-5-(furan-2-ylmethylene)-2-thioxothiazolidin-4-one (CAS 880638-81-3)
- Insulin Degludec Impurity 12 (CAS CATO-C4X-215712)
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