5-Chloro-2-methylbenzenethiol CAS 18858-06-5
| CAS No. | 18858-06-5 |
| Molecular Formula | C7H7ClS |
| Molecular Weight | 158.65 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5-Chloro-2-methylbenzenethiol 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.
5-Chloro-2-methylbenzenethiol (CAS 18858-06-5), molecular formula C7H7ClS and molecular weight 158.65 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to sulfur-containing functionality, chlorine substitution, an aromatic ring system, 5-Chloro-2-methylbenzenethiol is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 158.65 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
Physical & Chemical Properties
| Molecular Formula | C7H7ClS |
| Molecular Weight | 158.65 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Chloro Standards
- (Chloro-difluoro-methyl)-trimethyl-silane (CAS 115262-00-5)
- 2-Chloro-5-(prop-1-en-2-yl)thiophene (CAS 142019-00-9)
- 4-Chloro-3-methylbenzenethiol (CAS 17178-00-6)
- 4-Chloro-2-methylbenzenethiol (CAS 17178-01-7)
- 3-(5-Chloro-2-thienyl)-1-propene (CAS 173415-71-9)
- 3-Chloro-4-methylbenzenethiol (CAS 18800-45-8)
- 2-Chloro-6-methylthiophenol (CAS 18858-05-4)
- 2-Chloro benzyl mercaptan (CAS 39718-00-8)
Recommended Standards
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- 4-vinylbenzyl chloride (CAS 1592-20-7)
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- 2-(2-Isopropyl-5-methyloxazol-4-yl)ethanol (CAS 476458-88-5)
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- 6-(((4-Methoxyphenyl)diphenylmethyl)amino)hexan-1-ol (CAS 114729-83-8)
- SB 269970A (CAS 261901-57-9)
- 2-(3-Bromophenyl)-1H-imidazo[4,5-c]pyridine (CAS 850348-92-4)
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- 2-Amino-2-(4-propoxyphenyl)acetic acid (CAS 500695-51-2)
- Tirzepatide Impurity 34 (CAS CATO-C4X-324034)
Why CATO?
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