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Sodium Sulfite

Sodium Sulfite (Na2 So3) also refers to Sodium Sulfite is a soluble compound of sodium.  Sodium Sulfite is a product of SO2 scrubbing, a part of the flue gas desulphurization process. It is used as a preservative to prevent dried fruit from discoloring and to preserve meat.

Sodium sulfite is a white crystal powder or granule that tastes salty with sulphur odor.  Sodium Sulphite is primarily used in pulp and paper industry. Used in water treatment as an oxygen scavenger agent.  Also it is used in several other applications as ore flotation, oil recovery, food preservatives, boil treatment, iron exchange, fire, pesticide controller, in making dyes, detergents and in textile industries.
Analytical Specification of Sodium Sulfite
1. Sodium Sulfite (Na2SO3)
Comtemt percent by mass
96.00% (Min.)
2. Insoluble matter and metal 0.05% (Max.)
3. Free alkali (as Na2S3O3) 0.15%
4. Heavy metals (As pb) 0.002%
5. Iron (As Fe) 0.005%
6. PH of 10% Solution 9.4
7. PH of 1% Solution 8.8
8. Clearness of Solution Clear Solution and Free from Suspended matter
9. Turbidity Free from Turbidity


Product : Sodium Sulfite (Superfine Grade)
Process : Caustic Process
CAS NO. : 7757-83-7
Molecular Wt. : 126.04
Molecular formula : Na2SO3
PH : 9.0 to 10.5
Density : 2.633
Iron content : 20ppm Max
Potential Hazardous
  1. The material is arkari
  2. In contact with acidic materials it may release sulfur dioxide gas
  3. Will form arkari solution when dissolved in water
  4. Corrosive
  5. On heating Sox and Na20 will be evolved.
  6. Decomposes in fire giving off Sox and Na20
First Aid
In case of contact with Skin : Wash immediately with plenty of water
In case of contact with eyes : Rinse with Plenty of water
Fire Fighting
Extinguish Media : C02 d-y powder and water
Special fire fighting procedures : Wear self contained breathing apparatus and protective clothing to prevent contact
Unusual fire and explosion Hazard : Emits toxic fumes of Sulphur Dioxide under fire condition
Accidental Release
Evacuate Area
Wear self contained breathing apparatus, tuber boots and rubber gloves.
Do not touch spilled material & take up the spilled material in plastic container for disposal.
Wash, the spilled area with plenty ot water.
Handling and Storage
  1. Evacuate the area
  2. wear appropriate respirator Chemical resistant Gloves, Goggles and protective clothing.
  3. Avoid prolonged or repeated exposure. Wash thoroughly after handling
  4. Wash the spilled area with plenty of water.
Exposure control and protection of the body

Wear appropriate respirator, chemical resistant Gloves, Goggles and protective clothing.
Avoid prolonged or repeated exposure. wash thoroughly after handing
Dot not get in Eyes, on Skin, on clothing
Do not breath vapor
Get safety shower and eye bath

a. Special precaution for Transport & Storage : KEEP PRODUCT DRY
b. Hazardous Decomposition Products : None
c. Hazardous Polymerization : None
d. On heating : Decomposition emits very toxic Fumes of Na2O & Sox.
e. Portective Measures : Respirators, Gloves & Goggles,
f. Special Protective Measures : Avoid inhalation using protective equipments.
g. Measures after spillage or leakage : Remove by use of suitable equipments.
h. Disposal : By burning and depositing in official dumps.
Toxic by Ingestion, Inhalation and skin absorption.
a. Flash Point : N.A.
b. Extinguishing media : Water mist.
c. Special .fire precautions : None
d. Special fire and explosion hazard : Non
a. Acute oral toxicity (LD50) mg/kg : ivn - rat: LD50 - 115 mg/kg :
scu-dog: LDLo-1300 mg/kg :
b. Extinguishing media : Irritation may occur on contact.
c. Special .fire precautions : Not known.
Emergency and first aid procedures
a. Contact Medical practitioner    
b. Manufacturer Name & Address : patel Chemical Works
K-1/5,  G.I.D.C.,
Odhav, Ahmedabad.
  Telephone No.   (079) 69437382
(079) 22122511
  FAX No.   (079) 22121928
This product should be stored, handled and used in accordance with good industrial hygiene practices and in conformity with any legal regulations

This information is based on our present state of knowledge and is intended to describe our products from the point of view of the safety requirements. It should not therefore be construed as guaranteeing specific properties.
  1. Pesticides
  2. Textile
  3. Fire & Crackers
  4. Ion Exchange
  5. Boiler Treatment
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