7-(4-Chlorophenyl)-5-hydroxybenzo[d][1,3]oxathiol-2-one CAS 327078-55-7
| CAS No. | 327078-55-7 |
| Molecular Formula | C13H7ClO3S |
| Molecular Weight | 278.71 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 7-(4-Chlorophenyl)-5-hydroxybenzo[d][1,3]oxathiol-2-one.
CATO supplies 7-(4-Chlorophenyl)-5-hydroxybenzo[d][1,3]oxathiol-2-one (CAS 327078-55-7), a certified reference material (molecular formula C13H7ClO3S, MW 278.71 g/mol) for analytical method development and quality control.
Structurally, 7-(4-Chlorophenyl)-5-hydroxybenzo[d][1,3]oxathiol-2-one (C13H7ClO3S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 278.71 g/mol, it falls into the medium-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C13H7ClO3S |
| Molecular Weight | 278.71 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Chlorophenyl Standards
- 3-(3-Chlorophenyl)thieno[3,2-d]pyrimidine-2,4(1H,3H)-dione (CAS 1255784-16-7)
- 2-[3-(4-Chlorophenyl)-5-Fluorophenyl]Propanoic Acid (CAS 75852-61-8)
- 3-(4-Chlorophenyl)-3-(4-fluorophenyl)propanoic acid (CAS 80272-10-2)
- 3-(4-Chlorophenyl)thieno[3,2-d]pyrimidine-2,4(1H,3H)-dione (CAS 852854-16-1)
- 6-(2-Chlorophenyl)imidazo[2,1-b]thiazole-3-carboxylic acid (CAS 912770-05-9)
- 6-(3-Chlorophenyl)imidazo[2,1-b]thiazole-3-carboxylic acid (CAS 912770-22-0)
- 7-(2-chlorophenyl)-5-hydroxy-2H-1,3-benzoxathiol-2-one (CAS 301681-73-2)
- 2947AF 6-(4-Chlorophenyl)imidazo[2,1-b][1,3]thiazole-3-carboxylic acid 912770-34-4 C12H7ClN2O2S (CAS 912770-34-4)
Recommended Standards
- 7-(3-Chloro-phenyl)-5-hydroxy-benzo[1,3]oxathiol-2-one (CAS 307514-06-3)
- 8-(chloromethyl)-6-fluoro-2-phenyl-4H-1,3-benzodioxine (CAS 730992-77-5)
- Ethyl 3-(chlorosulfonyl)-4-methoxybenzoate (CAS 262589-79-7)
- Methyl 2-(4-(chlorosulfonyl)-2-methylphenoxy)acetate (CAS 56077-82-8)
- 2-(2,2-Difluoro-2H-1,3-benzodioxol-4-yl)acetonitrile (CAS 157437-24-6)
- 2-Amino-N-(2-bromophenyl)benzamide (CAS 34489-85-5)
- (3aS,8aS)-4,4,8,8-Tetrakis(3,5-dimethylphenyl)tetrahydro-2,2-dimethyl-6-phenyl-1,3-dioxolo[4,5-e][1,3,2]dioxaphosphepin (CAS 1169835-86-2)
- Levocetirizine Impurity 73 (CAS CATO-C4X-108373)
- 2-(4-Bromophenyl)-4,5,6,7-tetrahydrooxazolo[5,4-c]pyridine (CAS 885272-79-7)
- Methyl 3-bromo-4-(diethylamino)benzoate (CAS 1131594-26-7)
- tert-Butyl 1H-pyrazolo[3,4-b]pyridine-3-carboxylate (CAS 889451-30-3)
- 1-(CYCLOPROPYLMETHYL)-4-OXOCYCLOHEXANE-1-CARBONITRILE (CAS 916160-09-3)
- 5-Chloro-4-(piperidin-1-ylmethyl)-1,2,3-thiadiazole (CAS 338406-71-6)
- Hexapeptide-11 (CAS 100684-36-4)
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