Ethanethiol (Ethyl Mercaptan)
CAS No.: 75-08-1 | EC No.: 200-837-3
1. Chemical Identification
| Property | Specification |
|---|---|
| IUPAC Name | Ethane-1-thiol |
| Molecular Formula | C₂H₅SH |
| Molecular Weight | 62.13 g/mol |
| Appearance | Colorless liquid |
| Density | 0.839 g/mL at 25°C |
| Melting Point | -148°C |
| Boiling Point | 35°C |
| Refractive Index | n<sup>20</sup><sub>D</sub> 1.4306 |
| Flash Point | -45°C (closed cup) |
| Odor Threshold | 0.00019 mg/L (0.5 ppb) |
Synonyms:
Ethyl mercaptan, Ethyl sulfhydrate, Mercaptoethane
2. Key Applications
Pesticide Industry
- Organophosphate Production:
✓ Isopropyl phosphate
✓ Phorate
✓ Demeton (Internally absorbed phosphorus) - Antibacterial Agent 401 synthesis
Gas Industry
- Odorant/Warning Agent:
✓ Natural gas leak detection
✓ LPG/propane additive
✓ Jet fuel odorization
Pharmaceutical Synthesis
- Building block for sulfur-containing drug molecules
3. Product Advantages
✔ Ultra-Sensitive Odor – Reliable leak detection at 0.5 ppb
✔ High Reactivity – Effective thiolating agent
✔ Broad Utility – From agrochemicals to fuel safety
4. Physical & Chemical Properties
- Vapor Pressure: 442 mmHg at 20°C
- Solubility:
- Slightly soluble in water (6.76 g/L)
- Miscible with alcohol/ether
- Autoignition Temp.: 299°C
5. Handling & Storage
| Parameter | Requirement |
|---|---|
| Storage Temp | -20°C to 10°C (refrigerated) |
| Packaging | 150kg stainless steel cylinders |
| Shelf Life | 6 months under N₂ atmosphere |
| Special Notes | Explosion-proof area required |
6. Safety Information
Danger!
- H220: Extremely flammable gas
- H315+H319: Causes skin/eye irritation
- H335: May cause respiratory irritation
Protective Measures:
- P210: Keep away from heat/sparks/open flames
- P377: Leaking gas fire – do not extinguish
- P403+P233: Store in well-ventilated place
7. Quality Specifications
- Purity: ≥98% (GC)
- Sulfur Content: 51-53%
- Water Content: ≤0.05%
Disclaimer:
This information is for qualified professionals only. Requires explosion-proof equipment and proper gas detection systems. Compliance with local regulations for volatile sulfur compounds is mandatory.
