Sodium Nitrite
Sodium nitrite is a pale, straw-colored, granular or flake material that is soluble in water uponheating. It is stable in neutral or alkaline solutions, but decomposes in acid solutions to form unstable nitrous acid.
Product Quality Specification
| Sr Number | Parameter | Standard Grade Un coated |
Standard Coated grade |
Liquor 25 % Min |
Liquor 37 % Min |
|---|---|---|---|---|---|
| 01 | Physical Appearance |
White or Slightly yellowish crystalline powder |
White or Slightly yellowish crystalline powde |
Slightly hazy greenish yellow solution |
Greenish yellow Slightly hazy solution |
| 02 | Purity on Dry basis |
99.0 % Min | 99.0 % Min | 25.0 % Min |
37.0 % Min |
| 03 | Loss on Drying | 0.5 % Max | 0.5 % Max | -- | -- |
| 04 | Alkalinity as Na2CO3 |
0.2 % Max | 0.2 % Max | 0.5 % Max |
0.2 % Max |
| 05 | Chloride as C | 0.05 % Max |
0.05 % Max | 0.2 % Max |
0.03% Max |
| 06 | Sodium Nitrate | 1.0% Max | 1.0% Max | 4.0% Max |
2.0% Max |
| 07 | Water Insoluble | 0.05% Max | -- | -- | |
| 08 | Sulphate as SO4 |
-- | -- | -- | |
| 09 | Iron As Fe | 0.002% Max | 0.005% Max |
0.002% Max |
|
| 10 | Heavy Metal As Pb |
0.005% Max | -- | -- | |
| 11 | Clarity of 40 % Aq Solution |
Clear solution after 15 min |
-- | -- | |
| 12 | Anticaking agen |
-- | 0.2 % Max | -- | -- |
USES 1)Dyes and Pigments : It is basic raw material for azo dyes and pigments. It is used for diazotization of amines 2) Agrochemicals & Pharmaceuticals : It is used as an intermediate for lot of A P I and Agrochemicals 3) Metallurgy & Heat Transfer : It is used as an accelerator in phosphating which is a major component in metal treatment in Automobile industry.
Under the heat treatment is is used in combination with 45 % Sodium Nitrite along with Potassium Nitrate and Sodium Nitrate. These are used for quench hardening and tempering steel. This mixture is also used as heat transfer salt. 4) Rubber Chemicals: Used for manufacturing Di Nitroso Penta Methylene Tetra amine ( DNPT) a product used for manufacture of rubber based (Hawaii) foot wear. 5) Corrosion Inhibitor : The product is recommended as an additive for concrete and gypsum to inhibit corrosion of iron reinforcement