自拍乱伦三级综合,97精品超碰一区二区三区, 欧洲AV美女做爰,亚洲最大av网站每日更新

Ethylene glycol

Ethylene glycol (ethylene glycol), also known as "glycol", "1,2-ethylene glycol", or EG for short, with the chemical formula (CH2OH)2, is the simplest diol.

Glycol is mainly used in the manufacture of resins, plasticizers, synthetic fibers, cosmetics and explosives, and used as solvents and antifreeze for engines.

The quality of our ethylene glycol products meets the technical requirements of polyester grade in the national standard GB∕T 4649-2018 Industrial Ethylene Glycol, and the following chart shows the requirements of the national standard of industrial ethylene glycol.

Technical Parameters

GB/T4649-2018
Serial number Sports Event Norm
Polyvinyl Chloride Industrial Grade
1 Exterior condition Clear liquid, no mechanical impurities
2 Ethylene glycol，ω/%  ≥ 99.9 99.0
3 Diethylene glycol，ω/%  ≤ 0.050 0.600
4 1，4-butyl glycola，ω/%
 reportingb
5 1，2-butyl glycola，ω/%
 reportingb
6 1，2-glycola，ω/%
 reportingb
7 Vinyl carbonatea，ω/% reportingb
8

 Color (Platinum-Diamond)/No. 

Preheating  ≤

 After heating with hydrochloric acid  ≤ 

 

5

20

 

10

-
9 Densities(20 ℃)/(g/㎡) 1.112 8~1.113 8 1.1125~1.114 0
10

Boiling process(在0℃,0.101 33 MPa)

Initial distillation point/℃  ≥

The point of doing sth/℃  ≤

 

196.0

199.0

 

195.0

200.0
11 (fig.) overstatement，ω/%  ≥ 0.08 0.20
12 Acidity (as acetic acid)/(mg/kg)  ≤ 10 30
13 Iron content/(mg/kg)  ≤ 0.10 5.0
14 Ash/(mg/kg) 10 20
15 Aldehyde content (as formaldehyde)/(mg/kg) 8.0 -
16

Ultraviolet transmittance/%

220 nm  ≥

250 nm

275 nm  ≥

350 nm  ≥

 

75

reportingb

92

99

 -
17 Chloride Ion/(mg/kg)  ≤ 0.5 -

 

a The Ethylene Oxidation/Epoxy Ethylene Burning Hydration process is not required for this project.

b"Report" means to measure and provide measured data.