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179337

Sigma-Aldrich

Methanol

ACS reagent, ≥99.8%

Synonym(s):
Methyl alcohol
Linear Formula:
CH3OH
CAS Number:
Molecular Weight:
32.04
Beilstein:
1098229
EC Number:
MDL number:
eCl@ss:
39020101
PubChem Substance ID:
NACRES:
NA.21

Quality Level

grade

ACS reagent

vapor density

1.11 (vs air)

vapor pressure

410 mmHg ( 50 °C)
97.68 mmHg ( 20 °C)

assay

≥99.8%

form

liquid

autoignition temp.

725 °F

expl. lim.

36 %

impurities

H2SO4, passes test (darkened)
MnO4- reducers, passes test
≤0.0002 meq/g Titr. base
≤0.0003 meq/g Titr. acid
≤0.001% acetaldehyde
≤0.001% acetone
≤0.001% formaldehyde
≤0.1% water

evapn. residue

≤0.001%

color

APHA: ≤10
clear

refractive index

n20/D 1.329 (lit.)

bp

64.7 °C (lit.)

mp

−98 °C (lit.)

density

0.791 g/mL at 25 °C (lit.)

SMILES string

CO

InChI

1S/CH4O/c1-2/h2H,1H3

InChI key

OKKJLVBELUTLKV-UHFFFAOYSA-N

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General description

Methanol undergoes thermochemical conversion to C2-C10 hydrocarbons in the presence of shape-selective zeolites has been reported. Its oxidation on Ru-Pt catalyst system by ruthenium ad-atoms has been proposed.
Methanol is an organic solvent that can be synthesized from syngas in the presence of CuO/ZnO/Al2O3 catalysts. It is an ideal candidate as a hydrogen source in fuel cell technology due to its high H/C ratio, low propensity for soot generation, relatively low reforming temperature and as it exists in liquid state at room temperature. In a direct methanol fuel cell (DMFC), methanol undergoes oxidation with air to generate electricity. The olefins (ethylene or propylene) formed from methanol via MTO (methanol-to-olefins) process, can be an alternative to oil and gas to produce hydrocarbon fuels.

Application

Methanol has been used as a solvent for the sodium dodecyl sulfate-polyacrylamide gel electrophoretic (SDS-PAGE) analysis of alkaline protease isoforms isolated from larva of the spotted sand bass (Paralabrax maculatofasciatus). It has been used in the isolation and quantitative determination of carotenes and xanthophylls from Capsicum annum pericarp extracts by HPLC.

Packaging

200 L in Pure-Pac™ 2
4×4 L in poly bottle
500 mL in glass bottle
20 L in Pure-Pac™ 2
200 L in Pure-Pac™ 1
1, 6×1, 2.5, 4×2.5, 4, 4×4 L in glass bottle
200 L in steel drum
18 L in steel drum

Signal Word

Danger

Hazard Classifications

Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Flam. Liq. 2 - STOT SE 1

Target Organs

Eyes

Storage Class Code

3 - Flammable liquids

WGK

WGK 2

Flash Point(F)

49.5 °F - closed cup

Flash Point(C)

9.7 °C - closed cup

Certificate of Analysis

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Certificate of Origin

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