... -1986 3.Good quality,low price&service 4.Free samples 5.ISO,SGS,COA,MSDS 1.Description :Industrial Naphthalene is white ... 526.Explosion limit: Dust lower limit is 2.5 g/m2, steam 0.9~5.9%. It belongs to the second class flammabe ... .3ºC(excellent grade),≥78.0ºC(first level) ,≥77.5ºC(qualified level)invalatile substance:≤ 0.04 (excellent grade), ≤ 0 ...