CAS No.74-93-1,Methanethiol Suppliers,MSDS download

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Basic Information

Molecular Structure:
CAS No.:	74-93-1
Name:	Methanethiol
Article Data:	374
Cas Database

Formula:	CH₄S
Molecular Weight:	48.1088
Synonyms:	Mercaptomethane;Thiomethanol;Methanethiol;Methyl sulfhydrate;Thiomethyl alcohol;Mercaptan methylique;
EINECS:	200-822-1
Density:	0.814 g/cm³
Melting Point:	-123 °C(lit.)
Boiling Point:	6 °C(lit.)
Flash Point:	< 71 °C
Appearance:	colourless gas with a garlic-like or rotten cabbage-like smell
Hazard Symbols:	F+,T,N
Risk Codes:	12-23-50/53
Safety:	16-25-60-61
Transport Information:	UN 2037 2.3
PSA:	38.80000
LogP:	0.54600

Synthetic route

: 39076-43-2
S-methyl N-ethylthiocarbamate

: 74-89-5
methylamine

A: 74-93-1
methylthiol

B: 28145-10-0
1-ethyl-3-methylurea

Conditions

Conditions	Yield
In water at 50 - 55℃; for 1h;	A n/a B 100%

...Expand

: 75-04-7
ethylamine

: 39076-43-2
S-methyl N-ethylthiocarbamate

A: 74-93-1
methylthiol

B: 623-76-7
N,N'-diethylurea

Conditions

Conditions	Yield
In water at 40℃; for 8h;	A n/a B 100%

...Expand

: 10191-60-3
dimethyl N-cyanodithioiminocarbonate

: 100-51-6
benzyl alcohol

A: 74-93-1
methylthiol

B: 50909-46-1
benzyloxycarbonylcyanamide potassium salt

Conditions

Conditions	Yield
With potassium hydroxide 1.) 80-90 deg C, 48 h; 2.) 25-30 deg C 24 h;	A n/a B 99%

...Expand

: 74-87-3
methylene chloride

: 74-93-1
methylthiol

Conditions

Conditions	Yield
With hydrogen sulfide at 260 - 800℃; under 6000.6 Torr; for 0.216667h; Temperature; Pressure; Inert atmosphere; Calcination;	98.4%
With hydrosulfide anion In gas Rate constant; Thermodynamic data; reaction efficiency, ΔH0Rx;
With sodium hydrogensulfide; water unter Druck;

: 98773-05-8, 115958-66-2
trichlorogallium * ethanethiol

: 3908-55-2
Trimethyl(methylthio)silane

A: 75-77-4
chloro-trimethyl-silane

B: dichloro(ethylthio)gallane

C: dichloro(methylthio)gallane

D: 74-93-1
methylthiol

E: 75-08-1
ethanethiol

Conditions

Conditions	Yield
In benzene 4.62 mmol Me3SiSMe added to 4.62 mmol of the Ga compound in benzene; stirring at room temp.; filtration; solvent removed in vac.; elem. anal. (Cl2GaSC2H5);	A n/a B 98% C n/a D n/a E n/a

...Expand

: 98773-05-8, 115958-66-2
trichlorogallium * ethanethiol

: 35029-96-0
lead bis(methylthiolate)

A: dichloro(ethylthio)gallane

B: dichloro(methylthio)gallane

C: 74-93-1
methylthiol

D: 75-08-1
ethanethiol

E: lead(II) chloride

Conditions

Conditions	Yield
In benzene 2.10 mmol Pb(SCH3)2 added to 4.20 mmol of the Ga compound in benzene; stirring at room temp.; filtration; solvent removed in vac.; residue washed with n-pentane and dried in vac.; elem. anal. (Cl2GaSC2H5);	A 98% B n/a C n/a D n/a E n/a

...Expand

: 5863-81-0, 112528-10-6, 112528-11-7
methyl N-benzyl-N′-cyanocarbamimidothioate

A: 74-93-1
methylthiol

B: 21505-06-6
N3-benzyl-1H-1,2,4-triazole-3,5-diamine

Conditions

Conditions	Yield
With hydrazine hydrate In ethanol Heating;	A n/a B 97%

: 166829-91-0
1-cyan-3-(3'-amino-3',5'-dideoxythymidin-5'-yl)-2-methylisothiourea

A: 74-93-1
methylthiol

B: 3',5'-diamino-3',5'-dideoxy-3'-N,5'-N-(N-cyanoiminocarbonyl)thymidine

Conditions

Conditions	Yield
With silver nitrate In N,N-dimethyl-formamide for 18h; Ambient temperature; protected from light;	A n/a B 96%

: 22013-97-4
N-methyl-thiocarbamic acid S-methyl ester

A: 74-93-1
methylthiol

B: 598-50-5
N-Methylurea

Conditions

Conditions	Yield
With ammonia In water at 65℃;	A n/a B 96%

: 32885-06-6
S-methyl-N''-cyano-N'-(1-cycloethoxyethyl)carbamimidothioate

A: 51420-46-3
5-amino-3-morpholino-1H-1,2,4-triazole

B: 74-93-1
methylthiol

Conditions

Conditions	Yield
With hydrazine hydrate In ethanol Heating;	A 95% B n/a

Raw Materials

109-84-2

109-76-2

Downstream Products

75-07-0

701-57-5

123-09-1

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Consensus Reports

EPA Extremely Hazardous Substances List. Reported in EPA TSCA Inventory.

Standards and Recommendations

OSHA PEL: TWA 0.5 ppm
DFG MAK: 0.5 ppm (1 mg/m³)
NIOSH REL: (n-Alkane Monothiols) CL 0.5 ppm/15M
DOT Classification: 2.3; Label: Poison Gas, Flammable Gas

Analytical Methods

For occupational chemical analysis use OSHA: #26.

Specification

The Methyl mercaptan, with the CAS registry number 74-93-1, is also known as Thiomethanol. It belongs to the product category of API intermediates. Its EINECS number is 200-822-1. This chemical's molecular formula is CH₄S and molecular weight is 48.11. What's more, its systematic name is methanethiol. Its classification codes are: (1)Mutation data; (2)TSCA Flag T [Subject to the Section 4 test rule under TSCA]. It is an intermediate in the manufacturing of jet fuels, pesticides, fungicides, plastics, synthesis of methionine. Moreover, its odor may cause nausea. It is also used in the production of intermediates of methane sulfonyl chloride and methylthio propanol. It should be sealed and stored in a cool, ventilated and dry place. Moreover, it should be protected from oxides and fire.

Physical properties of Methyl mercaptan are: (1)ACD/LogP: 0.72; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 0.72; (4)ACD/LogD (pH 7.4): 0.72; (5)ACD/BCF (pH 5.5): 2.06; (6)ACD/BCF (pH 7.4): 2.06; (7)ACD/KOC (pH 5.5): 58.46; (8)ACD/KOC (pH 7.4): 58.42; (9)#H bond acceptors: 0; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 25.3 Å²; (13)Index of Refraction: 1.408; (14)Molar Refractivity: 14.57 cm³; (15)Molar Volume: 59 cm³; (16)Polarizability: 5.77×10^-24cm³; (17)Surface Tension: 19.2 dyne/cm; (18)Density: 0.814 g/cm³; (19)Enthalpy of Vaporization: 23.79 kJ/mol.

Preparation: this chemical can be prepared by 1-Aza-3-thia-1-cyan-2-piperidino-1-buten by heating. This reaction will need reagent 72% N₂H₄·H₂O and solvent ethanol. The yield is about 93%.

Methyl mercaptan can be prepared by 1-Aza-3-thia-1-cyan-2-piperidino-1-buten by heating

Uses of Methyl mercaptan: it can be used to produce 2-chloro-3-methylsulfanyl-propionic acid methyl ester at the ambient temperature. It will need reagent NaSCH₃ and solvent CH₂Cl₂ with the reaction time of 4 hours. The yield is about 87%.

Methyl mercaptan can be used to produce 2-chloro-3-methylsulfanyl-propionic acid methyl ester at the ambient temperature

When you are using this chemical, please be cautious about it as the following:
This chemical is extremely flammable, so you should keep it away from sources of ignition - No smoking. It is toxic by inhalation and is very toxic to aquatic organisms as it may cause long-term adverse effects in the aquatic environment. When using it, you must avoid contact with eyes. This material and its container must be disposed of as hazardous waste. You must avoid releasing it to the environment just refering to special instructions/safety data sheet.

You can still convert the following datas into molecular structure:
(1)SMILES: SC
(2)Std. InChI: InChI=1S/CH4S/c1-2/h2H,1H3
(3)Std. InChIKey: LSDPWZHWYPCBBB-UHFFFAOYSA-N

The toxicity data is as follows:

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)	LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES GASTROINTESTINAL: "HYPERMOTILITY, DIARRHEA" 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.