... radiation, able to absorb ultraviolet radiation, no turning into black with H2SApplication:White pigment, in dying, paper making, match ... Excellent gradeFirst gradeConforming articleExcellent gradeFirst gradeConforming articleZinc oxide(calculated with dry product ),% ≥99.799.599.499.799.599 ... be kept from breakage, moisture, pollution, and touch with acid. The period of validity is half a year, ...