Ethylene
Obtaining
Ethylene glycol — the simplest representative of polyols. Ethylene glycol is produced by hydration of ethylene oxide.
Application
In purified form ethylene glycol is a clear, colorless liquid with a slightly oily texture, it is odorless and has a slightly sweet taste, but its consumption is fatal.
An important property is the ability of ethylene glycol to lower the freezing point of water, so the material is widely used in the manufacture of
Ethylene glycol is used in the manufacture of hydraulic fluids, synthetic fibers, resins, solvents, and for other purposes.
Safety requirements
Ethylene glycol is flammable; the degree of impact on the body is a substance of third risk class.
Packing
Ethylene glycol is filled into aluminum barrels with a capacity of 110 and 275 dm і, barrels made of
Guaranteed shelf life
Premium — 1 year from date of manufacture
Class — 3 years from date of manufacture.
Item | Norm | |
Premium | First | |
Appearance | Clear liquid | |
Mass fraction of ethylene glycol, %, not less | 99.8 | 98.5 |
Mass of diethylene glycol, %, not more | 0.05 | 1,0 |
Chromaticity Hasena in units, not more: in the normal state after boiling with hydrochloric acid |
5 20 |
20 — |
Residue on ignition, %, not more | 0.001 | 0.002 |
Fe content, %, not more | 0.00001 | 0.0005 |
Water content, %, not more | 0.1 | 0.5 |
Mass fraction of acids in terms of acetic acid, %, not more | 0.0006 | 0.005 |
Refractive index at 20 °C | 1.431–1,432 | 1.430–1,432 |
Transmittance in the ultraviolet region, %, not less, at wavelengths 220/275/350 nm | 75/95/100 | — |
Class of danger | 2 |
Basic properties and hazards | |
Basic properties | Clear liquid. Oily, viscous residue solidifies on cooling vat. Odorless. Soluble in water. Hygroscopic. High boiling. Pollute the water. |
Explosion and fire | Flammable. Flash point of 120 °C. Ignited by heat from an open flame. Containers may explode when heated. |
The risk to humans | Has a narcotic effect. Harmful by inhalation (fatigue, headache, dizziness, shortness of breath, palpitations, chest pain), ingestion (nausea, diarrhea, weakness), in contact with skin (redness, swelling), Eye (stinging, tears). In case of fire may result in burns. If ingested, can cause chronic poisoning with damage to vital organs (blood vessels, kidneys, and nervous system). Ethylene glycol can be absorbed through the skin. Because of the low vapor pressure there is no danger of acute poisoning by inhalation. |
Individual protection means | For emergency responders — insulating protective clothing FIR 5 complete with an insulating mask At low concentrations in the air (above MPC 100 times) — overalls, industrial mask small dimension of Overalls, apron fabric membrane, rubber gloves and boots, mask mark " |