Methanol (CH3OH) is used as a basic organic chemical raw material. It is used in chemicals, pharmaceuticals and pesticide industries and can be used as fuel. From methanol, more than one hundred chemical products could be manufactured.
Industrial methanol accords with national standards (GB338-2004)
|
Item |
Indicator |
|
Premium product |
First-grade product |
Qualified product |
|
Chroma (Pt-Co scale) ≤ |
5 |
5 |
10 |
|
Density (20℃), g/cm3 |
0.791～0.792 |
0.791～0.793 |
0.791～0.793 |
|
Temperature range (0℃, 101325Pa), ℃ |
64.0～65.5 |
64.0～65.5 |
64.0～65.5 |
|
Boiling range (including 64.6±0.1℃), ℃ ≤ |
0.8 |
1.0 |
1.5 |
|
KMnO4 test, min ≥ |
50 |
30 |
20 |
|
Water miscibility test |
Pass the test (1+3) |
Pass the test (1+9) |
- |
|
Moisture content, % ≤ |
0.01 |
0.15 |
- |
|
Acidity (as to HCOOH), % ≤ |
0.001 5 |
0.003 0 |
0.005 0 |
|
Or alkalinity (as to NH3), % ≤ |
0.000 2 |
0.000 8 |
0.0001 5 |
|
Content of carbonyl compound (as to CH2O), % ≤ |
0.002 |
0.005 |
0.010 |
|
Content of residue on evaporation, % ≤ |
0.001 |
0.003 |
0.005 |
|
Sulfuric acid test/Hazen unit (Pt-Co scale) |
50 |
50 |
|
|
Mass fraction of ethanol, % |
Negotiated by supplier and buyer |
|
|
On packaging containers of industrial methanol products, firm marks should be painted to maintain clean and dry containers that are sealed.
Methanol should be stored in a dry, cool and ventilate location away from sunlight, heat and fire.
Methanol is a colorless inflammable liquid with a flash point of 8℃, and a spontaneous ignition temperature of 436℃. The volume fraction of methanol steam within the explosion range in the air is 6-36.5 percent.