... ,ISO,COA 3.Free sample 4.Basic chemical raw material 1. high quality of industrial naphthalene,technical naphthalene,Crude naphthalene,tar camphor ... .3ºC(excellent grade),≥78.0ºC(first level) ,≥77.5ºC(qualified level)invalatile substance:≤ 0.04 (excellent grade), ≤ 0.06 ... :≤ 0.01(excellent grade),≤0.01(first level),≤0.02(qualified level)Melting point:79-82 ºCBoiling point:218 ºCDensity:0.99Flash ...