be used as temperature sensing agent, premium-grade and first-grade Packing:. Disposable cylinder *0lb/*3.6kg, *0lb/*2.7kg. Quality standard :. Purity, %. =*9.8. Moisture, ppm. =*0. Acidity, ppm. =1. Vapor residue, ppm. =**0. Appearance. Colorless, no turbid. Odor. No strange stench