Sodium nitrite CAS 7632-00-0

Sodium nitrite, with the Chemical Abstracts Service (CAS) number 7632-00-0, is an inorganic compound represented by the formula NaNO2. It appears as a white to slightly yellow crystalline powder and is known for its various applications across multiple fields, including food preservation, chemical synthesis, and environmental research.
Uses of Sodium Nitrite
Food Preservation: Sodium nitrite is widely used as a preservative in cured meats, such as bacon and deli meats. It helps to prevent the growth of harmful bacteria and contributes to the characteristic pink color of these products.
Chemical Synthesis: In organic chemistry, sodium nitrite serves as a reagent in diazotization reactions, which are essential for synthesizing aromatic compounds, including azo dyes and pharmaceutical intermediates. Its ability to donate nitrite ions makes it crucial in the formation of nitroso compounds used in various industrial applications.
Environmental Chemistry: Sodium nitrite plays a significant role in studying nitrogen cycling and nitrate pollution. It is used to understand processes like nitrification and denitrification in aquatic ecosystems, which are vital for managing nutrient levels and preventing issues such as algal blooms.
Medical Applications: Sodium nitrite is also utilized as an antidote for cyanide poisoning. It works by converting hemoglobin to methemoglobin, which can bind cyanide ions, thereby reducing their toxicity.
Safety and Handling
Sodium nitrite is classified as harmful to the environment and can be toxic in certain concentrations. It is important to handle it with care, following appropriate safety protocols, especially in laboratory and industrial settings.
In summary, sodium nitrite (CAS 7632-00-0) is a versatile compound with significant applications in food preservation, chemical synthesis, environmental research, and medicine, while also requiring careful handling due to its potential hazards.