CAS 112945

Overview

CAS 112945-52-5 200 m2/g Specific surface area Silica, fumed for making optical glass

Silica, fumed Basic information
Product Name:	Silica, fumed
CAS:	112945-52-5
MF:	O2Si
MW:	60.08
EINECS:	231-545-4
Mol File:	112945-52-5.mol
Silica, fumed Chemical Properties
Melting point	>1600°C
density	2.3 lb/cu.ft at 25 °C (bulk density)(lit.)
refractive index	n20/D 1.46(lit.)
solubility	Practically insoluble in organic solvents, water, and acids, except hydrofluoric acid; soluble in hot solutions of alkali hydroxide. Forms a colloidal dispersion with water. For Aerosil, solubility in water is 150 mg/L at 258ºC (pH 7).
form	powder
Specific Gravity	2.2
Hydrolytic Sensitivity	5: forms reversible hydrate
CAS DataBase Reference	112945-52-5(CAS DataBase Reference)
EPA Substance Registry System	Silica, amorphous, fumed, cryst.-free (112945-52-5)

The nitrogen adsorption specific surface area/(m2/g)	200±30
45μm screenings/(mg/kg) ≤	250
Loss on ignition/% ≤	2.5
Silica content/% ≥	99.8
Suspension PH	3.7~4.5
Al2O3 content/(mg/kg) ≤	400
TiO2 content/(mg/kg) ≤	200
Fe2O3 content/(mg/kg) ≤	30
Carbon content/% ≤	0.2 TO SIO2
Chloride content/(mg/kg) ≤	250
105ºC volatiles/% ≤	3
Tap density /(g/dm3)	30~60