(NH₄)₂SO₃.H₂O

Item	Value
	First grade	Salable product
ammonium sulfite monohydrate,%≥	90.0	85.0
ammonium bisulfite or ammonium bicarbonate, %≤	0.5	1.0
ammiaonia sulfate , %≤	5.0	7.0
Free water ,%≤	4.5	7.0

white or light yellow crystal for papermaking