METHYL MERCAPTAN
$454.03
- Product nameMETHYL MERCAPTAN
- Cas No74-93-1
- MFCH4S
- MW48.11
- EINECS200-822-1
- MDL NumberMFCD00004866
Synonyms
methanethiolvialwith25ml ;Methvtiolo;Methyl thioalcohol;Methylmercaptaan;methylthioalcohol ;Metilmercaptano;Rcra waste number U153;rcrawastenumberu153
| Brand | Packaging | Price | Product name | |
|---|---|---|---|---|
|
American Custom Chemicals Corporation
CHM1054472
|
5MG | $454.03 | METHYL MERCAPTAN |
Properties
| Melting point | −123 °C(lit.) |
| Boiling point | 6 °C(lit.) |
| Density | 0.8665 |
| vapor density | 1.66 (vs air) |
| vapor pressure | 1536 mm Hg ( 20 °C) |
| FEMA | 2716 | METHYL MERCAPTAN |
| refractive index | 1.4020 (estimate) |
| Flash point | <71℃ |
| solubility | Soluble in alcohol, ether (Weast, 1986), and petroleum naphtha (Hawley, 1981) |
| pka | 10.3(at 25℃) |
| form | liquid |
| Odor | at 0.01 % in propylene glycol. decomposing cabbage garlic |
| Odor Type | sulfurous |
| explosive limit | 21.8% |
| Odor Threshold | 0.00007ppm |
| Water Solubility | 23.30 g/L at 20 °C (quoted, Windholz et al., 1983) 0.330 mol/L at 25 °C (Hine and Weimar, 1965) |
| Merck | 13,5983 |
| JECFA Number | 508 |
| BRN | 1696840 |
| Henry's Law Constant | 3.03 (Hine and Weimar, 1965) |
| Exposure limits | ACGIH:TLV-TWA 0.5 ppm (1.0 mg/m3) OSHA:PEL-Ceiling 10 ppm (20 mg/m3) NIOSH:REL-Ceiling 0.5 ppm [15-min] |
| Stability | Stable. Highly flammable - note low flash point. Reacts vigorously or explosively with a wide variety of materials - consult a full MSDS data sheet before using. Incompatible with strong oxidizing agents, alkali and alkaline earth metals, epoxides, hydrazines, ketones, lead, mercury (II) oxide, azo- and diazo- compounds, copp |
| LogP | 0.72 |
| CAS DataBase Reference | 74-93-1(CAS DataBase Reference) |
| EPA Substance Registry System | Methyl mercaptan (74-93-1) |
Safety Information
Symbol(GHS)
Signal word
Danger
Hazard statements
H220：Extremely flammable gas
H331：Toxic if inhaled
H410：Very toxic to aquatic life with long lasting effects
Precautionary statements
P210：Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P261：Avoid breathing dust/fume/gas/mist/vapours/spray.
P271：Use only outdoors or in a well-ventilated area.
P273：Avoid release to the environment.
P304+P340：IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P311：Call a POISON CENTER or doctor/physician.
P377：Leaking gas fire: Do not extinguish, unless leak can be stopped safely.
P381：Eliminate all ignition sources if safe to do so.
P391：Collect spillage. Hazardous to the aquatic environment
P403：Store in a well-ventilated place.
P403+P233：Store in a well-ventilated place. Keep container tightly closed.
P405：Store locked up.
P501：Dispose of contents/container to..…
Description
Methanethiol (also known as methyl mercaptan) is a colorless gas with a smell like rotten cabbage. It is a natural substance found in the blood and brain of humans and other animals as well as plant tissues. It is disposed of through animal feces. It occurs naturally in certain foods, such as some nuts and cheese. It is also one of the main chemicals responsible for bad breath and the smell of flatus. The chemical formula for methanethiol is CH3SH; it is classified as a thiol. It is sometimes abbreviated as MeSH. It is very flammable.
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