Tween 80 has a special smell and a slightly bitter taste. It becomes gelatinous at low temperatures and recovers after being heated. Easily soluble in water, soluble in ethanol, vegetable oil, ethyl acetate, methanol, toluene, but insoluble in mineral oil. Tween 80 is a synthetic nonionic emulsifier that is widely used in cosmetics, food fields and pharmaceutical preparations.
The quality indicators of Tween 80 are as follows:
HLB value 15.0;
Moisture content %≤3.0;
Viscosity 25℃ (mm2/s) 350-550;
Acid value (mgkOH/g) ≤ 2.2;
Saponification value (mgKOH/g) 45-60;
Hydroxyl value (mgKOH/g) 65-80;
Iodine value (mgl2/g) 18-24;
PH value 5.0-8.0;
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Ignition residue % ≤ 0.2;
Heavy metals (ppm) ≤ 10;
Specific gravity: (g/cm2) 1.06-1.09;
Cloud point: 93℃�