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| PRECIPITATED SILICA |
| We are specialized in offering a complete range of precipitated silica, that is sourced from some of highly trusted vendors of the industry. It is widely used in the applications of various industries such as rubber, dye & pigments, cosmetic and others. Further, our range is tested on various parameters to ensure purity, freshness and accurate composition. |
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SPECIFICATION NK -70
TECHNICALSPECIFICATION OF PRECIPITATED SILICA (NK – 3 SD Grade) |
| PROPERTY |
Specification |
Test Value |
| Moisture (%) |
5.0 + - 1.5 |
5.2 |
| Bulk Density (gm/cc) |
0.22 – 0.28 |
0.23 |
| pH Value |
6.5 -7.0 |
6.84 |
| Water Absorption (%) |
240 -270 |
248 |
| Loss on Ignition (%) |
6.0 Max |
5.74 |
| Surface Area (sqm / gm) |
185 + - 15 |
190 |
| Colour |
As Per Std |
Conforms to STD |
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TYPICAL PHYSIOCHEMICAL PROPERTIES OF
PRECIPITATED SILICA (POWDER PRODUCTS) |
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GRADES |
PROPERTY |
UNIT |
UNISIL NK-70 |
UNISIL NK-1 |
UNISIL NK-2 |
UNISIL NK-3 |
UNISIL NK-19 |
UNISIL NK-4 |
UNISIL NK-7 |
Appearance |
- |
Snow White free flowing powder |
Behaviour towards water |
- |
Hydrophilic |
Moisture (105°C) |
% |
5±1.5 |
5±1.5 |
5±1.5 |
5±1.5 |
5±1.5 |
5±1.5 |
5±1.5 |
Ignition loss (900° C for 2 hrs) |
% max |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
Surface Area (BET) |
m 2 /gm |
100-115 |
130-150 |
140-170 |
160-200 |
240-260 |
115-125 |
290-320 |
Average Particle size |
Primary |
|
Secondary |
|
nm |
10-12 |
18-20 |
16-18 |
12-14 |
8-10 |
10-12 |
6-8 |
µm |
14-16 |
8-10 |
10-12 |
10-12 |
12-14 |
8-10 |
8-10 |
Water Absorption |
% |
230-260 |
240-260 |
240-260 |
240-260 |
300-350 |
260-280 |
400-450 |
Oil absorption |
% |
225-255 |
235-255 |
235-255 |
235-255 |
295-345 |
255-275 |
395-495 |
Bulk Density* |
gm/cc |
0.12-0.16 |
0.09-0.12 |
0.11-0.16 |
0.12-0.18 |
0.10-0.14 |
0.08-0.10 |
0.08-0.12 |
pH (5% acq. Solution) |
- |
6.2-7.0 |
6.2-7.2 |
6.2-7.5 |
6.2-7.5 |
6.2-7.0 |
6.5-7.0 |
6.2-7.2 |
Residue on 300 mesh |
% max |
1.0 |
0.5 |
1.0 |
2.0 |
1.0 |
0.5 |
0.5 |
Specific Gravity |
- |
2±0.2 |
2±0.2 |
2±0.2 |
2±0.2 |
2±0.2 |
2±0.2 |
2±0.2 |
Refractive Index |
- |
1.46 |
1.46 |
1.46 |
1.46 |
1.46 |
1.46 |
1.46 |
Al2 O3 |
%(max) |
0.2 |
0.2 |
0.2 |
0.2 |
0.2 |
0.2 |
0.2 |
R2 O3 |
%(max) |
0.3 |
0.3 |
0.3 |
0.3 |
0.3 |
0.3 |
0.3 |
Fe as Fe2 O3 |
%(max) |
0.3 |
0.3 |
0.3 |
0.3 |
0.3 |
0.3 |
0.3 |
Storage Stability |
PRACTICALLY UNLIMITED UNDER FAVOURABLE TRANSPORT/STORAGE CONDITIONS |
Packing |
Kgs/bag |
25 |
25 |
25 |
25 |
25 |
25 |
25 |
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