Table 4  Aluminum mineral list Serial number name Molecular formula Relative molecular mass Quality /% Density / ( g / cm 3 ) Moh's hardness Al 2 O 3 H 2 O SiO 2 Na 2 O K 2 O SO 3 1 Gibberite Al 2 O 3 · H 2 O 120 85 15 　 　 　 　 3.01~3.5 3.5~7.0 2 Gibbsite Al 2 O 3 ·3 H 2 O 156 65.4 34.6 　 　 　 　 2.35~2.42 2.5~3.5 3 Nepheline Na 2 O · Al 2 O 3 · 2SiO 2 284.2 35.9 　 42.3 21.8 　 　 2.63 5.5~6.0 　 　 K2O · Al 2 O 3 · 2SiO 2 316.4 32.2 　 38 　 29.8 　 2.4~2.6 6 4 Alum K 2 SO 4 · Al 2 ( SO 4 ) 3 · 4Al ( OH ) 3 838.2 36.9 13.05 　 　 11.4 38.65 2.6~2.8 3.5~4.0 5 Corundum Al 2 O 3 102 100 　 　 　 　 　 4~.1 9 6 Kyanite Al 2 O 3 · SiO 2 162.1 62.9 　 37.1 　 　 　 3.56~3.68 4.5~7.0 7 Andalusite Al 2 O 3 · SiO 2 162.1 62.9 　 37.1 　 　 　 3.15 7.5 8 Red line stone Al 2 O 3 · SiO 2 162.1 62.9 　 37.1 　 　 　 3.24 7 Blowing agent ADC is the blowing agent with the largest gas generating capacity, the best performance and the widest application. Widely used in slippers, soles, insoles, plastic wallpaper, ceilings, floor leather, artificial leather, thermal insulation, sound insulation materials and other foaming. Foam Blowing Agents,Chemical Blowing Agent,ADC Blowing Agent,ADC Foaming Agent,Yellow Blowing Agent GuangDong DuBa New Material Technology Co.,LTD , https://www.dubachem.com