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Methanol

Name: Methanol
SKU: 0

Basic Information

CAS No.: 67-56-1
Molecular Formula: CH4O
Molecular weight: 32.04

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Product Details

Methanol, also known as "wood alcohol", is an organic compound and the simplest saturated monohydric alcohol. It is a colorless, transparent, flammable, volatile toxic liquid. Ingestion of 5 to 10 ml can cause blindness, and drinking a large amount can lead to death. Methanol is non-corrosive to metals at room temperature (except lead and aluminum) and has a slight alcohol smell. Relative density 0.792 (20/4℃), melting point -97.8℃, boiling point 64.5℃, flash point 12.22℃, autoignition point 463.89℃, vapor density 1.11, vapor pressure 13.33KPa (100mmHg21.2℃), vapor and air mixture explosion limit 6 to 36.5% (volume ratio), miscible with water, ethanol, ether, benzene, ketones, halogenated hydrocarbons and many other organic solvents. It is usually used as a solvent, antifreeze, fuel or neutralizer.

Chemical Properties

Property	Value
Melting point	-98 °C(lit.)
Boiling point	65.4 °C(lit.)
Density	0.791 g/mL at 25 °C
Vapor density	1.11 (vs air)
Vapor pressure	410 mm Hg ( 50 °C)
Refractive index	n20/D 1.329(lit.)
Fp	52 °F
Storage temp.	2-8°C
Solubility	Benzene: miscible(lit.)
Pka	15.2(at 25℃)
Form	Liquid Free From Particulates
Color	<10(APHA)
Specific Gravity	0.793 (20/20℃)
Relative polarity	0.762
Odor	Faint alcohol odor detectable at 4 to 6000 ppm (mean = 160 ppm)
Explosive limit	5.5-44%(V)
Odor Threshold	33ppm
Water Solubility	miscible
λmax	λ: 210 nm Amax: 0.50λ: 220 nm Amax: 0.30λ: 230 nm Amax: 0.15λ: 235 nm Amax: 0.10λ: 240 nm Amax: 0.05λ: 260 nm Amax: 0.01λ: 400 nm Amax: 0.01
Merck	14,5957
BRN	1098229
Henry's Law Constant	4.99 at 25 °C (headspace-GC, Gupta et al., 2000)
Exposure limits	TLV-TWA (200 ppm) (ACGIH), 260mg/m3, 1040mg/m3 (800 ppm) 15minutes (NIOSH); STEL 310mg/m3 (250 ppm); IDLH 25,000 ppm (NIOSH).
Dielectric constant	33.6（20℃）
LogP	-0.770
CAS DataBase Reference	67-56-1(CAS DataBase Reference)
NIST Chemistry Reference	Methyl alcohol(67-56-1)
EPA Substance Registry System	Methanol (67-56-1)

Safety Information

Property	Value
Hazard Codes	Xn,T,F
Risk Statements	10-20/ 21/ 22-68/ 20/ 21/ 22-39/ 23/ 24/ 25-23/ 24/ 25-11-40-36-36/ 38-23/ 25
Safety Statements	36/ 37-7-45-16-24/ 25-23-24-26
RIDADR	UN 1170 3/PG 2
WGK Germany	1
RTECS	PC1400000
F	3-10
Autoignition Temperature	385 °C
TSCA	Yes
HS Code	2905 11 00
HazardClass	3
PackingGroup	II
Hazardous Substances Data	67-56-1(Hazardous Substances Data)
Toxicity	LD50 oral (rat)5628 mg/kgLD50 skin (rabbit)15,840 mg/kgLC50 inhal (rat)>145,000 ppm (1 h)PEL (OSHA)200 ppm (260 mg/m3)TLV-TWA (ACGIH)200 ppm (260 mg/m3)—skinSTEL (ACGIH)250 ppm (328 mg/m3)
IDLA	6,000 ppm

Product Usage

Methanol, often referred to as wood alcohol, is a fundamental building block in the global chemical industry. Its most significant application is as a feedstock for producing formaldehyde, acetic acid, and various plastics, fibers, and resins. In the energy sector, methanol is gaining prominence as a clean-burning fuel or fuel additive, contributing to reduced emissions in marine and automotive transport. Furthermore, it serves as a high-performance industrial solvent for paints, varnishes, and inks, and is essential in wastewater treatment as a carbon source for denitrification.

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Methanol

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