Ethanethiol , standardforGC,≥99.5%(GC) , 75-08-1
Synonym(s):
Ethanethiol;Ethyl mercaptan;Mercaptan C2
CAS NO.：75-08-1
Empirical Formula: C2H6S
Molecular Weight: 62.13
MDL number: MFCD00004887
EINECS: 200-837-3
PRODUCT Properties
| Melting point: | -148 °C |
| Boiling point: | 35 °C(lit.) |
| Density | 0.839 g/mL at 25 °C(lit.) |
| vapor density | 2.1 (vs air) |
| vapor pressure | 8.51 psi ( 20 °C) |
| FEMA | 4258 | ETHANETHIOL |
| refractive index | n |
| Flash point: | 1 °F |
| storage temp. | Store below +30°C. |
| solubility | Soluble in Ether, Alcohol, Acetone |
| pka | 10.6(at 25℃) |
| form | Liquid |
| color | Colorless |
| Odor | Strong chunk; offensive garlic. |
| explosive limit | 2.8-18%(V) |
| Odor Threshold | 0.0000087ppm |
| Water Solubility | Slightly miscible with water. |
| JECFA Number | 1659 |
| Merck | 14,3726 |
| BRN | 773638 |
| Henry's Law Constant | 3.57(x 10-3 atm?m3/mol) at 25 °C (Przyjazny et al., 1983) |
| Exposure limits | TLV-TWA 0.5 ppm (～1.3 mg/m3 ) (ACGIH
and MSHA); ceiling 10 ppm (OSHA); IDLH
2500 ppm (NIOSH). |
| Dielectric constant | 6.9（14℃） |
| Stability: | Stable. Extremely flammable - note low flash point. Incompatible with oxidizing agents, strong acids. May form explosive mixtures with air. |
| LogP | 1.44 |
Description and Uses
Ethane thiol, commonly known as ethyl mercaptan, is a colorless gas or clear liquid with a distinct odor. It is an organosulfur compound with the formula CH3CH2SH. Abbreviated EtSH, it consists of an ethyl group (Et), CH3CH2, attached to a thiol group, SH. Its structure parallels that of ethanol, but with S instead of O. The odor of EtSH is infamous. Ethanethiol is more volatile than ethanol due to a diminished ability to engage in hydrogen bonding. Ethanethiol is toxic. It occurs naturally as a minor component of petroleum, and may be added to other wise odorless gaseous products such as liquefied petroleum gas (LPG) to help warn of gas leaks. At these concentrations, ethanethiol is not harmful.
Stenching agent for liquefied petroleum gases; adhesive stabilizer; manufacture of plastics, insecticides, and antioxidants
Safety
| Symbol(GHS) |    GHS02,GHS07,GHS09 |
| Signal word | Danger |
| Hazard statements | H224-H302+H332-H410 |
| Precautionary statements | P210-P233-P273-P301+P312-P304+P340+P312-P403+P233 |
| Hazard Codes | F,Xn,N,F+ |
| Risk Statements | 11-20-50/53-51/53-12-20/22 |
| Safety Statements | 16-25-60-61 |
| OEL | Ceiling: 0.5 ppm (1.3 mg/m3) [15-minute] |
| RIDADR | UN 2363 3/PG 1 |
| WGK Germany | 3 |
| RTECS | KI9625000 |
| F | 13 |
| Autoignition Temperature | 570 °F |
| TSCA | Yes |
| HS Code | 2930 90 98 |
| HazardClass | 3 |
| PackingGroup | I |
| Toxicity | LD50 orally in Rabbit: 682 mg/kg |
| IDLA | 500 ppm |
