CH2COONa

CH2COONa, also known as sodium acetate, is the sodium salt of acetic acid. Its chemical formula indicates a molecule consisting of a sodium ion (Na+) and an acetate ion (CH3COO-). The acetate ion is derived from acetic acid, the primary component of vinegar. Sodium acetate is a white crystalline solid at room temperature and is highly soluble in water.

In its anhydrous form, sodium acetate has the formula CH3COONa. It can also exist as a trihydrate, CH3COONa·3H2O, which contains three molecules of water of crystallization. This compound is commonly encountered in various applications. One of its well-known uses is as a food additive, designated by the E number E262. It functions as a preservative and a flavoring agent.

Sodium acetate is also utilized in heating pads and hand warmers. When a supersaturated solution of sodium acetate is triggered, it releases latent heat through crystallization, generating warmth. In the textile industry, it serves as a mordant in dyeing processes, helping to fix dyes to fabrics. Additionally, it finds use in concrete curing and as a buffering agent in chemical solutions. Its relative stability and ease of handling make it a versatile chemical compound.