|
SPECIFICATION
OF SODIUM SULPHITE (CO. CODE NO. SS01)
|
| |
|
Sr.
No.
|
Characteristics
|
Specifications
|
|
1.
|
Physical Appearance
|
White Crystalline Powder
|
|
2.
|
Assay as Na2SO3% by mass
|
98% Min.
|
|
3.
|
PH of 10% Solution
|
9.5 – 11
|
|
4.
|
Clearity of 10% Solution
|
Clear and Colourless
|
|
5.
|
Insoluble Matter
|
0.05% Max.
|
|
6.
|
Iron ( as Fe)
|
50ppm Max.
|
|
7.
|
Heavy Metal ( as Pb)
|
15ppm Max.
|
|
8.
|
Thiosulphate
|
200 ppm Max.
|
|
9.
|
Free Alkali
|
0.1% Max.
|
|
|
|
SPECIFICATION
OF SODIUM SULPHITE (CO. CODE NO. SS02)
|
| |
|
Sr.
No.
|
Characteristics
|
Specifications
|
|
1.
|
Physical Appearance
|
White Crystalline Powder
|
|
2.
|
Assay as Na2SO3% by mass
|
96% Min.
|
|
3.
|
PH of 10% Solution
|
9.5 – 11
|
|
4.
|
Clearity of 10% Solution
|
Clear and Colourless
|
|
5.
|
Insoluble Matter
|
0.05% Max.
|
|
6.
|
Iron ( as Fe)
|
50ppm Max.
|
|
7.
|
Heavy Metal ( as Pb)
|
15ppm Max.
|
|
8.
|
Thiosulphate
|
200 ppm Max.
|
|
9.
|
Free Alkali
|
0.15% Max.
|
|
|
|
SPECIFICATION
OF SODIUM SULPHITE (CO. CODE NO. SS03)
|
| |
|
Sr.
No.
|
Characteristics
|
Specifications
|
|
1.
|
Physical Appearance
|
Pale Yellow Powder
|
|
2.
|
Assay as Na2SO3% by mass
|
95 to 97%
|
|
3.
|
PH of 10% Solution
|
5 – 6PH
|
|
4.
|
Clearity of 10% Solution
|
Slight Hazzy
|
|
5.
|
Insoluble Matter
|
0.05% Max.
|
|
6.
|
Iron ( as Fe)
|
50ppm Max.
|
|
7.
|
Heavy Metal ( as Pb)
|
15ppm Max.
|
|
8.
|
Thiosulphate
|
200 ppm Max.
|
|
9.
|
Free Alkali
|
0.5% Max.
|
|
|
|
SPECIFICATION
OF SODIUM SULPHITE (CO. CODE NO. SS04)
|
| |
|
Sr.
No.
|
Characteristics
|
Specifications
|
|
1.
|
Physical Appearance
|
White to Pale Yellow Powder
|
|
2.
|
Assay as Na2SO3% by mass
|
95% Min.
|
|
3.
|
PH of 10% Solution
|
6-7PH
|
|
4.
|
Clearity of 10% Solution
|
Slight Hazzy
|
|
5.
|
Insoluble Matter
|
0.05% Max.
|
|
6.
|
Iron ( as Fe)
|
50ppm Max.
|
|
7.
|
Heavy Metal ( as Pb)
|
15ppm Max.
|
|
8.
|
Thiosulphate
|
200 ppm Max.
|
|
9.
|
Free Alkali
|
0.5% Max.
|
|
| |
|
SPECIFICATION
OF SODIUM SULPHITE (CO. CODE NO. SS05)
|
| |
|
Sr.
No.
|
Characteristics
|
Specifications
|
|
1.
|
Physical Appearance
|
White Crystalline Powder
|
|
2.
|
Assay as Na2SO3% by mass
|
94 to 96%
|
|
3.
|
PH of 10% Solution
|
9.5 – 11
|
|
4.
|
Clearity of 10% Solution
|
Clear and Colourless
|
|
5.
|
Insoluble Matter, Max.
|
0.05%
|
|
6.
|
Iron ( as Fe) Max.
|
50ppm
|
|
7.
|
Heavy Metal ( as Pb) Max.
|
15ppm
|
|
8.
|
Thiosulphate Max.
|
200 ppm
|
|
9.
|
Free Alkali Max.
|
0.15%
|
|
|
|
SPECIFICATION
OF SODIUM SULPHITE (CO. CODE NO. SS06)
|
| |
|
Sr.
No.
|
Characteristics
|
Specifications
|
|
1.
|
Physical Appearance
|
White Crystalline Powder
|
|
2.
|
Assay as Na2SO3% by mass
|
92 to 94%
|
|
3.
|
PH of 10% Solution
|
9.5 – 11
|
|
4.
|
Clearity of 10% Solution
|
Clear and Colourless
|
|
5.
|
Insoluble Matter
|
0.05% Max.
|
|
6.
|
Iron ( as Fe)
|
50ppm Max.
|
|
7.
|
Heavy Metal ( as Pb)
|
15ppm Max.
|
|
8.
|
Thiosulphate
|
200 ppm Max.
|
|
9.
|
Free Alkali
|
0.15% Max.
|
|
|
|
SPECIFICATION
OF SODIUM SULPHITE (CO. CODE NO. SS07)
|
| |
|
Sr.
No.
|
Characteristics
|
Specifications
|
|
1.
|
Physical Appearance
|
White to Offwhite Powder
|
|
2.
|
Assay as Na2SO3% by mass
|
90% Min.
|
|
3.
|
PH of 10% Solution
|
9.5 – 11
|
|
4.
|
Clearity of 10% Solution
|
Slight Hazzy
|
|
5.
|
Insoluble Matter
|
0.05% Max.
|
|
6.
|
Iron ( as Fe)
|
50ppm Max.
|
|
7.
|
Heavy Metal ( as Pb)
|
15ppm Max.
|
|
8.
|
Thiosulphate
|
200 ppm Max.
|
|
9.
|
Free Alkali
|
0.5% Max.
|
|
|
|
SPECIFICATION
OF SODIUM SULPHITE (CO. CODE NO. SS08)
|
| |
|
Sr.
No.
|
Characteristics
|
Specifications
|
|
1.
|
Physical Appearance
|
White to Offwhite Powder
|
|
2.
|
Assay as Na2SO3% by mass
|
80 - 88%
|
|
3.
|
PH of 10% Solution
|
9.5 – 11
|
|
4.
|
Clearity of 10% Solution
|
Slight Hazzy
|
|
5.
|
Insoluble Matter, Max.
|
0.05%
|
|
6.
|
Iron ( as Fe) Max.
|
50ppm
|
|
7.
|
Heavy Metal ( as Pb) Max.
|
15ppm
|
|
8.
|
Thiosulphate Max.
|
200 ppm
|
|
9.
|
Free Alkali
|
0.5% Max.
|
|
|
|
SPECIFICATION
OF SODIUM SULPHITE (CO. CODE NO. SS09)
|
| |
|
Sr.
No.
|
Characteristics
|
Specifications
|
|
1.
|
Physical Appearance
|
White to Off White Powder
|
|
2.
|
Assay as Na2SO3% by mass
|
45 to 50% Min.
|
|
3.
|
PH of 10% Solution
|
6-8PH
|
|
4.
|
Clearity of 10% Solution
|
Slight Hazzy
|
|
5.
|
Insoluble Matter
|
0.05% Max.
|
|
6.
|
Iron ( as Fe)
|
50ppm Max.
|
|
7.
|
Heavy Metal ( as Pb)
|
15ppm Max.
|
|
8.
|
Thiosulphate
|
200 ppm Max.
|
|
9.
|
Free Alkali
|
0.5% Max.
|
|
