... silicon oil as non-hazardous goods. How to distinguish the pure silicon oil and ungraded silicon oil?(1) ... ,which is a kind of petrochemicals. And, Pure silicon oil can not be fired, which is ... odorless, clear, nontoxic. The burning point of pure silicon oil is 3200C,but ungraded silicon oil is ... hours, ungraded silicon oil will turn to turbid or frozen ,while pure silicon oil is still clear and ...