Antiscorching Silica 7631-86-9

Antiscorching Silica 7631-86-9

Chemical Name: Silica
Molecular Formula: SiO2·nH2O
CAS NO.: 7631-86-9
Package: 25kg/bag
Storage Life: 12months
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Product Details


Description:


Chemical NameSilica
Molecular FormulaSiO2·nH2O
CAS NO.7631-86-9
Package20-25kg/bag
Storage Life12 months


Specification:


Appearance

White Powder/Granule

Silica(Dry Basis)≥%

98

Type

S115

S125

S155

S175

S195

BET Specific Surface Area m2/g

100-130

115-135

140-160

165-185

185-205

CTAB

90-120

105-125

130-150

155-175

175-195

Bulk Density g/l

190-260 Powder
270-340 /Granule

PH value(10% aqueous solution)

6.0-7.5

Loss on Ignition(dry basis)% ≤

7.0

Loss on Drying   % ≤

4.0-8.0

DBP Adsorption, cm³/100g

200-300

 Residue (45μm ) %≤

0.50

Cu Content, mg/kg≤

30.0

Mn Content, mg/kg≤

50.0

Fe Content, mg/kg ≤

1000.0

%(Na2SO4)  

Soluble Salts%(in forms of Na2SO4)≤

1.6




Silica is used in the manufacture of flat glass, glass, foundry sand, glass fiber, ceramic glaze, blasting for rust prevention, sand for filtration, flux, refractory and lightweight concrete. Silica is widely used. Crystals that are rare in nature can be used to make important parts, optical instruments and crafts in the electronics industry. Silica is an important raw material for the manufacture of optical fibers. Generally pure quartz can be used to make quartz glass. Quartz glass has a small expansion coefficient, which is equivalent to 1/18 of ordinary glass. It can withstand extreme temperature changes and has good acid resistance (except HF). Therefore, quartz glass is often used to make high temperature resistant chemical instruments. Quartz sand is often used as a glass raw material and building material.

Silica is an important material for scientific research in the manufacture of glass, quartz glass, water glass, optical fiber, important parts of the electronics industry, optical instruments, handicrafts and refractory materials.

When the crystal of silica is perfect, it is crystal; after the silica gel is dehydrated, it is agate; the colloid of water containing silica is solidified and becomes opal; when the crystallite of silica is less than a few microns, it is composed of chalcedony, vermiculite and secondary. Quartzite. Mineral resources with very stable physical and chemical properties. Crystals are trigonal oxide minerals, ie low-temperature quartz (α-quartz), which is the most widely distributed mineral species in quartz family minerals. The generalized quartz also includes high temperature quartz (β-quartz). Quartz block, also known as silica, is mainly used to produce quartz sand (also known as silica sand), and is also a raw material for quartz refractories and fired ferrosilicon.

The food industry is used as an anti-caking agent, antifoaming agent, thickener, filter aid, and clarifying agent. China's "Sanitary Standards for the Use of Food Additives" (GB2760-2011): can be used for egg powder, powdered sugar, milk powder, cocoa powder, cocoa butter, vegetable powder, instant coffee, soup powder, etc., the maximum use is 15g / kg , powder flavor, the maximum use is 80g / kg; solid beverage, the maximum use is 0.2g / kg; grain, 1.2g / kg




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