Glycerin

Glycerin refined
Description cp grade iw grade
Glycerol, percent by mass, min. 98. 0 98. 0
Relative density at 30 / 30 deg. C. min. 1. 2552 1. 2552
Colour reading on lovibond scale expressed as y + r, not deeper than (in 51 / 4" cell) 1. 0 3. 5
Ash, percent by mass, max. 0. 01 0. 01
Arsenic (as as) , parts per million max. 2. 0 ---
Copper to pass the test ---
Iron (as fe) , parts per million, max. 0. 5 ---
Lead (as pb) , parts per million, max. 1. 0 ---
Chlorides (as CI) , parts per million, max. 10. 0 60. 0
Sulphates (as so4) , parts per million, max. 10. 0 ---
Alkalinity (as na2o) , percent by mass, max. nil 0. 01
Total alkali (free and combined) as na2o, percent by mass, max. nil 0. 01
Fatty acids and esters as na2o, percent by mass, max. 0. 03 ---
Acraldehyde and glucose to pass the test ---
Reducing substances to pass the test ---