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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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TYPICAL PHYSIOCHEMICAL PROPERTIES OF PRECIPITATED SILICA |
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GRADE |
PROPERTY |
UNIT |
UNISIL NK-3 (Spray Dried) |
Appearance |
- |
Snow White free flowing powder |
Behaviour towards water |
- |
Hydrophilic |
Moisture (105°C) |
% |
5±1.5 |
Ignition loss (900° C for 2 hrs) |
% max |
170±15 |
Surface Area (BET) |
m2 /gm |
290-320 |
Average Particle size |
Primary |
|
Secondary |
|
nm |
15 |
µm |
5 |
Water Absoption |
% |
240-260 |
Oil absorption |
% |
235-255 |
Bulk Density* |
gm/cc |
0.30-0.35 |
pH (5% acq. Solution) |
- |
6.2-7.0 |
Specific Gravity |
- |
2±0.2 |
Refractive Index |
- |
1.46 |
SiO2 |
% |
98-99 |
Al2 O3 |
% |
0.2 |
R2 O3 |
% |
0.2 |
Fe as Fe2 O3 |
% |
0.03 |
Arsenic (As) |
ppm max |
5 |
Lead (Pb) |
ppm max |
5 |
Storage Stability |
PRACTICALLY UNLIMITED UNDER FAVOURABLE TRANSPORT/STORAGE CONDITIONS |
Packing |
Kgs/bag |
25 |
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TYPICAL PHYSIOCHEMICAL PROPERTIES OF PRECIPITATED SILICA |
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GRADE |
PROPERTY |
UNIT |
UNISIL NK-3 HS |
Appearance |
- |
Snow White free flowing powder |
Behaviour towards water |
- |
Hydrophilic |
Moisture (105°C) |
% |
5±1.5 |
Ignition loss (900° C for 2 hrs) |
% max |
6 |
Surface Area (BET) |
m2 /gm |
150±10 |
Average Particle size (d50) |
nm |
3-5 |
Water Absorption |
% |
240-270 |
Oil absorption |
% |
235-265 |
Bulk Density* |
gm/cc |
0.06-0.08 |
pH (5% acq. Solution) |
- |
6.8±0.5 |
Residue on 300 mesh |
% max |
0.1 |
Specific Gravity |
- |
2±0.02 |
Refractive Index |
- |
1.46 |
SiO2 |
% |
98-99 |
Al2 O3 |
%max |
0.2 |
R2 O3 |
%max |
0.3 |
Fe as Fe2 O3 |
%max |
0.03 |
Storage Stability |
PRACTICALLY UNLIMITED UNDER FAVOURABLE TRANSPORT/STORAGE CONDITIONS |
Packing |
Kgs/bag |
25 |
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TYPICAL PHYSIOCHEMICAL PROPERTIES OF PRECIPITATED SILICA |
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GRADE |
PROPERTY |
UNIT |
UNISIL NK-3 (Special) |
Appearance |
- |
Snow White free flowing powder |
Behaviour towards water |
- |
Hydrophilic |
Moisture (105°C)2 |
% |
5±1.5 |
Ignition loss (900° C for 2 hrs)3 |
% max . |
6 |
Surface Area (BET)4 |
m2 /gm |
160±20 |
Average Particle size |
Primary9 |
nm |
16-18 |
| Secondary9 |
um |
10-12 |
Water Absorption |
% |
240-260 |
Oil absorption |
% |
235-255 |
Bulk Density1,5 |
gm/cc |
0.11-0.16 |
pH (2% acq. Solution)6 |
-- |
6.8±0.5 |
| Residue on 300 mesh7 |
% max. |
1.0 |
Specific Gravity |
-- |
2±0.02 |
Refractive Index |
-- |
1.46 |
SiO28 |
% |
98-99 |
Al2 O38 |
%max |
0.2 |
R2 O38 |
%max |
0.3 |
Fe as Fe2 O38 |
%max |
0.03 |
Storage Stability |
PRACTICALLY UNLIMITED UNDER FAVOURABLE TRANSPORT/STORAGE CONDITIONS |
Packing |
Kgs/bag |
25 |
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Unique feature of: UNISIL NK-4HS |
Specially developed for pesticides / insecticides formulations which surpasses all currently available products in functional properties |
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GRADE |
PROPERTY |
NK-4HS |
Best Values of Other Grades |
Suspensibility |
over 90% |
85% |
Bulk Density |
Tapped |
0.07 gm/cc |
0.10 gm/cc |
| Untapped |
0.05 gm/cc |
0.08 gm/cc |
Average Praticle Size |
4 Microns |
7 Microns |
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TYPICAL PHYSIOCHEMICAL PROPERTIERS |
| PROPERTY |
UNIT |
VALUE |
| pH |
-- |
6.5-7.0 |
| Moisture |
% |
6±1.5 |
| L.O.I. |
% |
4.0±1.5 |
| Residue on 300 mesh |
%max |
0.1 |
| Water Absorption |
% |
240-270 |
| Specific Gravity |
-- |
2±0.02 |
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TYPICAL PHYSIOCHEMICAL PROPERTIES OF PRECIPITATED SILICA |
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GRADE |
PROPERTY |
UNIT |
UNISIL NK-4 C |
Appearance |
- |
Snow White free flowing powder |
Behaviour towards water |
- |
Hydrophilic |
Moisture (105°C)2 |
% |
5±1.5 |
Ignition loss (900° C for 2 hrs)3 |
% max . |
6 |
Surface Area (BET)4 |
m2 /gm |
120-160 |
Average Particle size |
Primary9 |
Nm |
10-12 |
| Secondary9 |
um |
8-10 |
Water Absorption |
% |
240-280 |
Oil absorption |
% |
235-275 |
Bulk Density1,5 |
Gm/cc |
0.09-0.12 |
pH (2% acq. Solution)6 |
-- |
6.5-7.0 |
| Residue on 300 mesh7 |
%max |
0.2 |
Specific Gravity |
-- |
2±0.02 |
Refractive Index |
-- |
1.46 |
SiO 28 |
% |
98-99 |
Al2 O38 |
%max |
0.2 |
R2 O38 |
%max |
0.2 |
Fe2 O38 |
%max |
0.03 |
Storage Stability |
PRACTICALLY UNLIMITED UNDER FAVOURABLE TRANSPORT/STORAGE CONDITIONS |
Packing |
Kgs/bag |
25 |
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