Calcium hydroxide is an inorganic compound with the chemical formula Ca(OH)2. it is a colorless.

1	Appearance	Free Flowing white powder, free of lumps
2	Specific Gravity	2.20
3	pH (1% Solution)	12.4
4	Purity	98 - 99%
5	Solubility at 68 F (20 C)	0.165 G/100 ml water
6	Moisture Content	2% w/w
7	Bulk Density	138 lb/ft3 (2,210.5 kg/m3)
8	Packed	50 kg HDPE bags with inner liner

Hydrated lime is most widely used as a flocculant, in water and sewage treatment.