Sodium Metabisulfite Powder

Sodium Metabisulfite, also known as sodium pyrosulfite, is an inorganic sulfur compound presented as white crystalline powder with a faint sulfur dioxide odor. It dissolves easily in water and forms sodium bisulfite solution, slightly soluble in ethanol. Our product adopts advanced synthesis and purification process, with stable particle size, low impurity content and excellent batch consistency. It can be supplied in food grade and industrial grade to satisfy different industry standards such as FCC and GB. This raw material is a multi-functional reducing agent widely traded globally. Strict quality control is carried out during production, with heavy metal and insoluble substance well controlled. It shall be sealed and stored in dry, cool and ventilated warehouse, away from oxidants and acid materials to avoid decomposition. It is one of the most cost-effective sulfite raw materials for food, water treatment, textile printing & dyeing and pharmaceutical intermediate synthesis, favored by bulk buyers, factories and formulation manufacturers worldwide.

This sodium metabisulfite powder mainly works by releasing sulfur dioxide slowly in aqueous system. Its core property is strong reducibility, supporting multiple functional purposes. As antioxidant, it suppresses oxidase activity to block oxidation browning of fruits, vegetable juice and wine. As preservative and bacteriostatic agent, it inhibits bacteria, mold and yeast reproduction, extending shelf life of food and beverage. In water treatment, it serves as dechlorinating agent, quickly removing residual free chlorine and chloramine after disinfection, protecting reverse osmosis membrane and pipeline equipment. In textile industry, it acts as bleaching and decolorizing auxiliary for natural fiber. It also works as reducing agent in chemical and pharmaceutical synthesis, stabilizing reaction system and purifying crude products. Different dosage can adjust its releasing speed of effective ingredients, which makes it flexible for diverse technical formulas.

When properly dosed, our sodium metabisulfite brings reliable and predictable processing effects. For food processing, it effectively prevents enzymatic browning of fruit pulp, sugar syrup and dried fruits, maintaining bright color and original flavor without obvious bad aftertaste, and suppresses spoilage microorganism growth to prolong shelf life. For water treatment projects, it rapidly neutralizes residual chlorine, avoids chlorine oxidation damage to membrane modules, reduces wastewater treatment risks and stabilizes water quality index. For textile dyeing process, it helps remove pigment impurities on fiber, improves whiteness and color uniformity of finished fabrics. In pharmaceutical production, it stabilizes sensitive intermediates and reduces by-products, raising finished product yield. Compared with other reducing additives, it features lower cost, fast reaction speed and convenient feeding. Note that excessive addition will bring sulfur dioxide residue, and customers should follow local regulation limits to achieve safe, stable and compliant processing results.