Acetic acid is widely distributed in nature China factory price acetic acid liquid
The harm of acetic acid is related to the concentration of acetic acid solution. The EU classification of acetic acid solutions is exemplified in the table below:
|
Concentration (mass) |
Molarity |
Grading |
|
|
10%–25% |
1.67–4.16 mol/L |
Irritate (Xi) |
R36/38 |
|
25%–90% |
4.16–14.99 mol/L |
Corrosion (C) |
R34 |
|
>90% |
>14.99 mol/L |
Corrosion (C) |
R10, R35 |
Physical properties:
Boiling point: 117.9℃
Freezing point: 16.6℃
Relative density (water=1): 1.050
Viscosity (mPa.s): 1.22（20℃）
Vapor pressure at 20°C (KPa): 1.5
Refractive Index (n20ºC): 1.3719
Refractive Index (n25ºC): 1.3698
Viscosity (mPa s, 15ºC): 1.314
Viscosity (mPa s, 30ºC): 1.040
Heat of evaporation (kJ/mol, 25ºC): 23.05
Heat of evaporation (kJ/mol, b.p.): 24.39
Heat of fusion (kJ/kg): 108.83
Heat of formation (kJ/mol, 25ºC, liquid): -484.41
Ignition temperature (℃): 426
Explosion upper limit (%): 16.0
Lower explosion limit (%): 5.4
Solubility: soluble in organic solvents such as water, ethanol, ether, carbon tetrachloride and glycerol.
React with inorganics
- Acetic acid can react with some salts to form the corresponding acetates.
Acetic acid and sodium carbonate:2CH3COOH+Na2CO3==2CH3COONa+CO2↑+H2O
Acetic acid and calcium carbonate:2CH3COOH+CaCO3==(CH3COO)2Ca+CO2↑+H2O
Acetic acid and sodium bicarbonate:NaHCO3+CH3COOH==CH3COONa+H2O+CO2
Acetic acid reacts with weak acid salts:2CH3COOH+CO32-==2CH3COO-+H2O+CO2
The following is the national standard of the People’s Republic of China on industrial acetic acid:
|
Item |
Specific |
||
|
Grade |
Premium |
First grade |
Qualified |
|
Chroma,Hazen Units (Platinum-Cobalt) ≤ |
10 |
20 |
30 |
|
Acetic acid content % ≥ |
99.8 |
99.0 |
98.0 |
|
Moisture % ≤ |
0.15 |
- |
- |
|
Formic acid content % ≤ |
0.06 |
0.15 |
0.35 |
|
Acetaldehyde content % ≤ |
0.05 |
0.05 |
0.10 |
|
Evaporation residue % ≤ |
0.01 |
0.02 |
0.03 |
|
Iron content (as Fe)% ≤ |
0.00004 |
0.0002 |
0.0004 |
|
Reduction of potassium permanganate substances min ≥ |
30 |
5 |
- |
Application
- Acetic acid can be used in some pickling and polishing solutions, as a buffer in weak acid solutions (such as zinc plating, electroless nickel plating), as an additive in semi-bright nickel plating electrolytes, and in passivation solutions of zinc and cadmium. It can improve the binding force of passivation film and is often used to adjust the pH of weak acid plating solution.
- Used in the production of acetates, such as salts of metals such as manganese, sodium, lead, aluminum, zinc, cobalt, etc., widely used as catalysts, auxiliaries in fabric dyeing and leather tanning industries.Lead acetate is paint color lead white; lead tetraacetate is an organic synthesis reagent (for example, lead tetraacetate can be used as a strong oxidant, provide a source of acetoxy groups, and prepare organic lead compounds, etc.).
- Acetic acid can also be used as analytical reagents, organic synthesis, synthesis of pigments and pharmaceuticals.
Transportation management
The time limit for railway transportation of this product is to use the tank car provided by the aluminum enterprise for shipment, and it must be reported to the relevant department for approval before shipment.For non-canned transportation by railway, it should be assembled in strict accordance with the Dangerous Goods Compatibility Table in the “Rules for the Transport of Dangerous Goods” of the Ministry of Railways. The packaging should be complete and the loading should be secure at the time of shipment.During transportation, make sure that the container does not leak, collapse, fall or be damaged.The tank (tank) truck used for transportation should have a grounding chain, and a hole partition can be set in the tank to reduce the shock and static electricity.It is strictly forbidden to mix and transport with oxidants, alkalis, edible chemicals, etc. When transporting by road, it is necessary to drive according to the prescribed route, and do not stop in residential areas and densely populated areas.
