Propylene glycol codex
Propylene glycol codex
:entification - Pass Pass USP
PG Purity, on a dry basis wt.% Min. 99.80 99.80 USP
EG ppm Max. 50 1 USP
DEG ppm Max. 50 1 USP
Tests
Residue ppm Max. 20 10 USP
Chlorides ppm Max. 1.0 USP
Sulfate ppm Max. 10 0.1 USP
Heavy Metal ppm Max . 1.0 USP
ecific Tests
Specific Gravity, 25/25°C 1.035 — 1.037 1.036 USP
Acidity (as Acetic acid) ppm Max. 30.0 10.0 USP
Water ppm Max. 700 200 USP
Iron ppm ppm Max. 0.10 0.10 ASTM E 394
Color APHA Max. 10 3 ASTM D 1209
Distillation, 1 atm °C 186 - 189 186 - 187 ASTM D 1078