Thesoda ashaccords with the National Standard of GB210-92 GB/T19002-1994 idt ISO9002: 1994 Standard Registration Number: SC07 Date:17.04.1998 SODIUM CARBONATE LIGHT(SODA ASH LIGHT) ItemIndexNa2CO3 (on dry base) % min. 99.2Chlorides as NaCL (on dry base) % max. 0.70Fe (on dry base) % max. 0.0035Insoluble matters in water % max. 0.03