1,1-Dimethylethanethiol
2-Methyl-2-propanethiol
CAS: 75-66-1
Molecular Formula: C4H10S
1,1-Dimethylethanethiol - Names and Identifiers
| Name | 2-Methyl-2-propanethiol |
| Synonyms | TBM(TM) TERT-BUTANETHIOL 2-Isobutanethiol T-BUTYL MERCAPTAN TERT-BUTYL MERCAPTAN tert-Butyl mercaptan 1,1-Dimethylethanethiol 2-METHYL-2-PROPANETHIOL 2-methylpropane-2-thiol 2-Methyl-2-propanethiol 2-Propanethiol, 2-methyl- |
| CAS | 75-66-1 |
| EINECS | 200-890-2 |
| InChI | InChI=1/C4H10S/c1-4(2,3)5/h5H,1-3H3 |
1,1-Dimethylethanethiol - Physico-chemical Properties
| Molecular Formula | C4H10S |
| Molar Mass | 90.19 |
| Density | 0.8g/mLat 25°C(lit.) |
| Melting Point | -1.1 °C |
| Boling Point | 62-65°C(lit.) |
| Flash Point | −12°F |
| Water Solubility | Slightly soluble in water |
| Solubility | 1.47g/l slightly soluble |
| Vapor Presure | 303.5 mm Hg ( 37.7 °C) |
| Vapor Density | 3.1 (vs air) |
| Appearance | Liquid |
| Color | Clear colorless |
| Merck | 14,1579 |
| BRN | 505947 |
| pKa | pK1:11.22 (25°C,μ=0.1) |
| Storage Condition | Flammables area |
| Stability | Stable. Flammable - note low flashpoint. Incompatible with strong oxidizing agents. |
| Refractive Index | n20/D 1.423(lit.) |
| Physical and Chemical Properties | Tert-butyl mercaptan pure and industrial products are colorless transparent liquid, m. P. 1.11 ℃, B. P. 64.22 ℃, the relative density of 0.798~0.801, there are different odor, volatile. |
1,1-Dimethylethanethiol - Risk and Safety
| Risk Codes | R11 - Highly Flammable R41 - Risk of serious damage to eyes R65 - Harmful: May cause lung damage if swallowed R43 - May cause sensitization by skin contact R36 - Irritating to the eyes R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S3 - Keep in a cool place. S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S39 - Wear eye / face protection. S38 - In case of insufficient ventilation, wear suitable respiratory equipment. S36/37 - Wear suitable protective clothing and gloves. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 2347 3/PG 2 |
| WGK Germany | 3 |
| RTECS | TZ7660000 |
| FLUKA BRAND F CODES | 13 |
| HS Code | 29309090 |
| Hazard Class | 3.1 |
| Packing Group | II |
1,1-Dimethylethanethiol - Reference Information
| olfactory Threshold | 0.000029ppm |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Application | tert-butyl mercaptan, also known as the third butanethiol, is an important fine chemical raw material and intermediate, which is widely used in the field of organic synthesis, for example, it can be used as an intermediate for the synthesis of organophosphorus insecticide terbuthyl. In addition, it can also be used in the polymer field as a molecular weight regulator in the polymerization reaction. Terbutaline is an intermediate of The organophosphorus insecticide terbuthyl. |
| production method | the preparation method is to obtain tert-butyl mercaptan by catalytic reaction of isobutylene and hydrogen sulfide. (CH3)2C = CH2 H2S [catalyst] →(CH3)3CSH the synthesis tower with Catalyst is preheated to 70 ℃, and isobutene gas and dry hydrogen sulfide gas are passed into the mixer according to a certain ratio, the mixed gas enters the preheater for preheating. Control a certain temperature and then enter the synthesis Tower, maintain a stable flow rate so that the reaction gas from the top of the tower into the condenser, the unreacted mixed gas is sent back to the mixer through the separator, and the separated liquid is tert-butyl mercaptan. |
| category | flammable liquid |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50: 4729 mg/kg |
| stimulation data | eye-rabbit 84 Mg |
| flammability hazard characteristics | open flame, heat, oxidant flammable; In case of acid, toxic sulfur oxide gas emitted by heat |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature, separate from oxidants and acids |
| extinguishing agent | water mist, foam, sand, carbon dioxide, 1211 extinguishing agent |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 19:05:15
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