1 Mass fraction of sulfur, %, not less than 99,95
2 Mass fraction of ash, %, not less than 0,03
3 Mass fraction of organic compounds, %, not more than 0,03
4 Mass fraction of acids converted to sulfuric acid, %, not more than 0,003
5 *Mass fraction of moisture, %, not more than 0,2
6 Presence of mechanical impurities absent
7 Color bright yellow