Sodium Bisulfite (E222) In Thane

Sodium Bisulfite (also spelled sodium bisulphite) is an inorganic compound with the chemical formula NaHSO₃. It is a white crystalline powder or granular substance with a mild sulfurous odor, and it is soluble in water. Sodium bisulfite is often used as a reducing agent and preservative in various industrial, pharmaceutical, and food-related applications due to its ability to release sulfur dioxide (SO₂). Key Properties: Molecular Formula: NaHSO₃ Appearance: White crystalline powder or granules Odor: Mild sulfurous odor (due to the release of SO₂) Solubility: Highly soluble in water, producing an acidic solution Melting Point: Decomposes upon heating, releasing sulfur dioxide (SO₂) pH (in solution): Slightly acidic, around 4-5 Decomposition: Releases sulfur dioxide (SO₂) when heated or dissolved in acid Food Preservative: Sodium bisulfite is commonly used as a food additive (E222) to prevent oxidation and spoilage. It helps maintain color, inhibit microbial growth, and extend shelf life in products like dried fruits, juices, and wine. Water Treatment: Employed in water treatment processes as a reducing agent to remove excess chlorine from water after disinfection, making it useful in industrial and municipal water systems. Chemical Industry: Sodium bisulfite is used as a reducing agent in chemical processes, particularly in the production of pharmaceuticals, dyes, and paper. It can reduce and bleach materials by reacting with oxygen and other oxidizing agents. Textile and Leather Processing: In the textile industry, it is used as a reducing agent in dyeing and printing processes, helping to remove excess dyes. It also aids in leather processing by preventing discoloration and maintaining softness. Photography: Historically used in photographic developing solutions to reduce and prevent oxidation in the fixer bath, thereby preserving the image quality of developed photos. Pharmaceuticals: Sodium bisulfite is used as an antioxidant and preservative in certain medications and injectable drugs to prevent oxidation and extend their shelf life. Safety and Handling: Toxicity: Sodium bisulfite is considered moderately hazardous, especially upon inhalation or ingestion of dust or solutions. In sensitive individuals, it may trigger allergic reactions, such as respiratory irritation or asthma-like symptoms, particularly in people with sulfite sensitivity. Irritation: It can cause irritation to the skin, eyes, and respiratory tract upon contact or inhalation. Prolonged exposure to sodium bisulfite dust or vapor may lead to respiratory issues. Handling Precautions: Appropriate personal protective equipment (gloves, goggles, masks) should be worn when handling sodium bisulfite to avoid direct contact and inhalation of dust. It should also be stored in a dry, well-ventilated area. Environmental Impact: Biodegradability: Sodium bisulfite breaks down relatively easily in water and air, primarily through the release of sulfur dioxide, which eventually converts to sulfate ions (SO₄²⁻). However, the release of SO₂ in large amounts can contribute to air pollution and acid rain. Chemical Reactions: Acid Decomposition: In acidic conditions, sodium bisulfite releases sulfur dioxide (SO₂), a gas used in many industrial processes. NaHSO3+H+Na++H2O+SO2NaHSO₃ + H⁺ Na⁺ + H₂O + SO₂NaHSO3​+H+Na++H2​O+SO2​N

Sodium Bi Sulphate