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Substance Name: Methyl mercaptan
RN: 74-93-1
UNII: 2X8406WW9I
InChIKey: LSDPWZHWYPCBBB-UHFFFAOYSA-N
Note
- Intermediate in the manufacturing of jet fuels, pesticides, fungicides, plastics, synthesis of methionine; odor may cause nausea; narcotic in high concentrations; depresses urea biosynthesis.
Molecular Formula
- C-H4-S
Molecular Weight
- 48.1086
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- Names & Synonyms
- Registry Numbers
- Structure Descriptors
- Toxicity
- Physical Properties
Classification Codes
Classification Codes
- Mutation Data
- TSCA Flag T (Subject to the Final TSCA Section 4 Test Rule)
Superlist Classification Codes
- Ceiling 10 ppm (20 mg/m3)
- Reportable Quantity (RQ) = 100 lb
- Threshold Planning Quantity (TPQ) = 500 lb
- TWA (0.5 ppm)
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Names and Synonyms
Name of Substance
- Methyl mercaptan
- Methylmercaptan
Synonyms
- 4-01-00-01273 (Beilstein Handbook Reference)
- BRN 1696840
- EC 200-822-1
- EINECS 200-822-1
- FEMA No. 2716
- HSDB 813
- Mercaptan methylique
- Mercaptan methylique [French]
- Mercaptomethane
- Methaanthiol
- Methaanthiol [Dutch]
- Methanethiol
- Methanthiol
- Methanthiol [German]
- Methvtiolo
- Methvtiolo [Italian]
- Methyl mercaptan
- Methyl mercaptan (natural)
- Methyl sulfhydrate
- Methylmercaptaan
- Methylmercaptaan [Dutch]
- Methylmercaptan
- Metilmercaptano
- Metilmercaptano [Italian]
- Metilmercaptano [Spanish]
- RCRA waste number U153
- Thiomethanol
- Thiomethyl alcohol
- UN 1064
- UNII-2X8406WW9I
Systematic Name
- Methanethiol
Superlist Names
- Methanethiol
- Methyl mercaptan
- Methyl mercaptan [UN1064] [Poison gas]
- RCRA waste no. U153
- Thiomethanol
- UN1064
Registry Numbers
CAS Registry Number
- 74-93-1
FDA UNII
- 2X8406WW9I
Other Registry Numbers
- 1417534-47-4
- 505027-72-5
- 63933-47-1
Related Registry Numbers
- 21094-80-4 (mercury(2+) salt)
- 35029-96-0 (lead(2+) salt)
- 5188-07-8 (hydrochloride salt)
System Generated Number
- 0000074931
Structure Descriptors
InChI
InChI=1S/CH4S/c1-2/h2H,1H3InChIKey
LSDPWZHWYPCBBB-UHFFFAOYSA-NSmiles
CSToxicity
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| mammal (species unspecified) | LD50 | unreported | 60670ug/kg (60.67mg/kg) | Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 16(6), Pg. 46, 1972. | |
| mouse | LC50 | inhalation | 6530ug/m3/2H (6.53mg/m3) | Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 16(6), Pg. 46, 1972. | |
| rat | LC50 | inhalation | 675ppm (675ppm) | GASTROINTESTINAL: "HYPERMOTILITY, DIARRHEA" LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES KIDNEY, URETER, AND BLADDER: URINE VOLUME INCREASED | Personal Communication from H.B. Lackey, Chemical Products Div., Crown Zellerbach, Camas, WA 98607, June 9, 1978Vol. 09JUN1978, |
Physical Properties
| Physical Property | Value | Units | Temp (deg C) | Source |
|---|---|---|---|---|
| Melting Point | -1.23E+02 | deg C | EXP | |
| Boiling Point | 5.9 | deg C | EXP | |
| pKa Dissociation Constant | 10.33 | (none) | 25 | EXP |
| log P (octanol-water) | 0.780 | (none) | EST | |
| Water Solubility | 1.54E+04 | mg/L | 25 | EXP |
| Vapor Pressure | 1510 | mm Hg | 25 | EXP |
| Henry's Law Constant | 3.12E-03 | atm-m3/mole | 25 | EST |
| Atmospheric OH Rate Constant | 3.29E-11 | cm3/molecule-sec | 25 | EXP |
Physical property data is provided to ChemIDplus by SRC, Inc.