Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.

DOT Classification:  5.1; Label: Oxidizer

Sodium Nitrite, its cas register number is 7632-00-0. It also can be called Anti-rust; Azotyn sodowy; Diazotizing salts;Dusitan sodny; Erinitrit; Filmerine; Natrium nitrit; Nitrite de sodium; Nitrito sodico. Sodium nitrite is the inorganic compound with the chemical formula NaNO₂. It is a white to slight yellowish crystalline powder that is very soluble in water and is hygroscopic.It is a Nitrous acid sodium salt. And it is used in many industrial processes, in meat curing, coloring, and preserving, and as a reagent in analytical chemistry techniques. It is used therapeutically as an antidote in cyanide poisoning. The compound is toxic and mutagenic and will react in vivo with secondary or tertiary amines thereby producing highly carcinogenic nitrosamines.

Preparation of Sodium Nitrite: 
Sodium Nitrite is prepared by treating sodium hydroxide with mixtures of nitrogen dioxide and nitric oxide:
2 NaOH + NO₂ + NO → 2 NaNO₂ + H₂O
The conversion is sensitive to the presence of oxygen, which can lead to varying amounts of sodium nitrate.
In former times, sodium nitrite was prepared by reduction of sodium nitrate with various metals.

Uses of Sodium Nitrite: 
Sodium nitrite (NaNO₂) is a chemical compound commonly used in fertilizers, food preservatives, smoke bombs, as a color fixative, dyes and pyrotechnics.The main use of sodium nitrite is for the industrial production of organonitrogen compounds. It is a reagent for conversion of amines into diazo compounds.Sodium nitrite can be used as part of an intravenous mixture to treat cyanide poisoning.It is well known for its role in inhibiting the growth of Clostridium botulinum spores in refrigerated meats.

Safety information of Sodium Nitrite:
When you are using Sodium Nitrite, please be cautious about it as the following:(1)In case of accident or if you feel unwell, seek medical advice immediately (show label where possible); (2)Avoid release to the environment. Refer to special instructions safety data sheet; (3)Wear suitable protective clothing; (4)In case of contact with eyes, rinse immediately with plenty of water and seek medical advice;

You can still convert the following datas into molecular structure:
(1)InChI=1S/HNO2.Na/c2-1-3;/h(H,2,3);/q;+1/p-1;
(2)InChIKey=LPXPTNMVRIOKMN-UHFFFAOYSA-M;
(3)SmilesN(=O)[O-].[Na+];

The toxicity data of Sodium Nitrite is as follows: