5-Methylbenzo[b]thiophene 1,1-dioxide CAS 19156-71-9
| CAS No. | 19156-71-9 |
| Molecular Formula | C9H8O2S |
| Molecular Weight | 180.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-Methylbenzo[b]thiophene 1,1-dioxide is closely related to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
5-Methylbenzo[b]thiophene 1,1-dioxide (CAS 19156-71-9), molecular formula C9H8O2S and molecular weight 180.22 g/mol, is a CATO reference standard with documented purity and traceability.
5-Methylbenzo[b]thiophene 1,1-dioxide (C9H8O2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 5-Methylbenzo[b]thiophene 1,1-dioxide meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C9H8O2S |
| Molecular Weight | 180.22 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | 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.) | 1962 |
| Sulfur Atoms | 1 |
Related Methylbenzo Standards
- 2-Methylbenzo[b]thiophene 1,1-dioxide (CAS 6224-55-1)
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Recommended Standards
- 2,3-Dihydro-1-benzothiophene-3-carboxylic acid (CAS 19156-56-0)
- ((1R,3S)-3-Hydroxycyclopentyl)methanesulfonic acid (CAS 64646-22-6)
- (1-(5-Fluoropyridin-2-yl)cyclobutyl)methanamine (CAS 1857841-31-6)
- (1r,2s)-2-(3-Fluorophenyl)cyclopentan-1-ol (CAS 436847-87-9)
- 2,4-Dichloro-5-nitro-6-(trifluoromethyl)pyrimidine (CAS 715-42-4)
- 4-Chloro-N-((2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-ylidene)methyl)benzamide (CAS 477885-69-1)
- 1-Iodo-3-(propan-2-yloxy)propan-2-ol (CAS 201596-42-1)
- 1,3-Dibromo-5,6,7,8-tetrahydroimidazo[1,5-a]pyridine (CAS 1780530-11-1)
- 4-((2-(Pyrrolidin-1-yl)ethoxy)methyl)piperidine dihydrochloride (CAS 1248509-76-3)
- 3-Bromo-5-ethynylbenzoic acid (CAS 1823360-76-4)
- Methyl 2-((6-methylimidazo[1,2-a]pyrazin-3-yl)amino)acetate (CAS 823806-72-0)
- 6'-Fluorospiro[cyclopentane-1,3'-indolin]-2'-one (CAS 52140-54-2)
- 6-Bromo-N-(piperidin-4-yl)pyridin-2-amine hydrochloride (CAS 1185315-52-9)
- Liraglutide Impurity 16 TFA Salt (CAS CATO-C4X-199216)
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