Mono-Propylene glycol PG Propylene Glycol
Chemical name: Propylene Glycol; 1,2-propanediol
Molecular formula: C3H8O2
Structural formula: CH3-CH-CH2
︱ ︱
OH OH
Relative molecular weight: 76.09
Relative density(20/20℃)g/cm3:1.035~1.039
Distillation range>95%,(vol.)℃: 184~190
CAS NO.:57-55-6
Appearance: Colorless transparent or pale yellow liquid with special taste
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Items Unit Specification Results
Color Apha color 10max <10
Moisture Weight % 0.2max 0.070
Specific Gravity 25℃ 1.035-1.037 1.036
Refractive index 25℃ 1.4307-1.4317 1.4312
Distillation range (L),℃ 184-189 186
Distillation range (U),℃ 184-189 185
Distillation volume Vol% 95min 97.8
Identification —— passed passed
Acidity ml 0.20max 0.10
Chloride Weight % 0.007max <0.007
Sulfate 0.006max 0.006max <0.006
Heavy metals ppm 5max <5
Residue on ignition Weight % 0.007max 0.002
Organic Volatile impurity Chloroform(µg/g) 60max Non-detected
Organic Volatile impurity 1.4 dioxane(µg/g) 380max Non-detected
Organic Voltile impurity methylene chloride(µg/g) 600max Non-detected
Organic Voltile impurity trichloroethylene(µg/g) 80max Non-detected
Assay GLC% 99.5min 99.90
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