CAS NO. 7757-83-7
 
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SPECIFICATION OF SODIUM SULPHITE (Co. Code No. S1)

 
 

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. S2)

 

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. S7)

 

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. S8)

 

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. S3)

 

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. S4)

 

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. S5)

 

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. S6)
 

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. S9)

 

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.

 
 

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