Overview
Sodium ascorbate powder is the sodium salt of ascorbic acid (vitamin C), widely recognized for its antioxidant properties and role as a food preservative. Unlike ascorbic acid, it has minimal effect on pH, making it preferable for applications where acidity control is important. As a water-soluble antioxidant, sodium ascorbate effectively prevents oxidation in various food products while also serving as a nutrient supplement. Its neutral pH makes it particularly valuable in meat processing, where it helps maintain color and prevents nitrosamine formation.
Physical and Chemical Properties
The compound appears as a white to slightly yellowish crystalline powder with excellent water solubility (620 g/L at 25°C). Its molecular structure includes a sodium ion bound to the ascorbate anion, giving it different solubility and reactivity characteristics compared to ascorbic acid. Sodium ascorbate demonstrates strong reducing properties, readily donating electrons to neutralize free radicals and reactive oxygen species. It shows good thermal stability below 200°C but decomposes upon melting at 218°C. The powder is hygroscopic and should be protected from moisture to prevent caking.
Main Applications
In the food industry, sodium ascorbate serves as a preservative in processed meats (especially cured products), baked goods, and beverages. It prevents color and flavor deterioration while maintaining nutritional value. The pharmaceutical industry utilizes it in vitamin supplements and as an antioxidant in injectable medications. Cosmetic formulations incorporate sodium ascorbate for its skin-brightening and anti-aging properties. Industrial applications include water treatment and as a reducing agent in chemical processes.
Safety and Storage
Classified as GRAS (Generally Recognized As Safe) by the FDA, sodium ascorbate has low toxicity but may cause mild gastrointestinal discomfort at very high doses. Proper storage requires airtight containers in cool, dry conditions away from light. When handling bulk quantities, use appropriate personal protective equipment to prevent inhalation of dust. The material is not considered hazardous but may cause eye irritation upon direct contact. Shelf life typically exceeds two years when stored correctly.
B2B Procurement Guide
When sourcing sodium ascorbate powder, specify the required grade (food, pharmaceutical, or technical). Food-grade material should comply with FCC or equivalent standards, while pharmaceutical-grade must meet USP/BP specifications. Consider purchasing in multi-layer moisture-proof packaging for better shelf life. Bulk buyers should evaluate suppliers' quality control systems and request certificates of analysis for each batch. Price negotiations often depend on order volume, with typical MOQs starting at 25kg for premium grades.
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