Specification
(Specification:IS:539:1983 Grade II) Sr. No. CHARACTERISTIC REQUIREMENT (GRADE) Colour When compared in identical glass tubes,
the powdered material shall be not darker than a solution of 20mg
of iodine and 40 mg of potassium iodide in 100ml of water. Crystallizing point, degree C, min. 78.5 Moisture content, percent by mass , max. 0.2 Ash, percent by mass, max. 0.02 Acid wash test- Matter insoluble in benzene ,percent by mass, max. 0.1 Non-volatile matter at 160 degree C, percent by mass, max. 0.1 Total Sulphur, percent by mass, max. 0.4 Total nitrogen, percent by mass, max. 0.1