Sodium thiosulfate pentahydrate, chemically known as Na₂S₂O₃·5H₂O or natrium thiosulfate pentahydrate, is a versatile inorganic compound widely used across industries. This colorless, efflorescent crystal appears as large, monoclinic prisms with a cool, saline taste and a specific gravity of 1.69. It is highly soluble in water (up to 70.1 g/100 mL at 20°C) but insoluble in alcohol, making it ideal for aqueous applications.

In the food industry, sodium thiosulfate pentahydrate serves as an antioxidant (E539) and sequestrant, preventing oxidation in seafood processing and canned goods. For instance, it neutralizes chlorine residuals in water used for food washing, ensuring compliance with FDA 21 CFR 173.310 standards. Its role in dechlorination is critical for breweries and bottled water producers, where even trace chlorine can ruin flavors. Studies from the Journal of Food Science (2022) show it reduces microbial contamination by 40% without altering pH.

For feed additives, it acts as a sulfur source and detoxifier, mitigating aflatoxins in animal feed. Poultry and aquaculture operations in the USA rely on it to improve feed efficiency, with USDA reports indicating up to 15% better weight gain in broiler chickens. Our product, produced via advanced crystallization from high-purity sodium sulfite and sulfur dioxide, exceeds 99% assay, surpassing competitors' 97-98% grades.

In pharmaceutical intermediates, sodium thiosulfate pentahydrate is a key antidote for cyanide poisoning (as per USP monograph) and used in chemotherapy drug synthesis. The USP 47th edition specifies its pentahydrate form for IV injections, with our batches tested to <0.001% heavy metals. Pharma giants like those in New Jersey procurement chains seek our OEM/ODM capabilities for custom crystal sizes (20-80 mesh).

Beyond these, water treatment applications dominate, where it dechlorinates municipal water at a 1:1 molar ratio to chlorine (8.5 lbs per 1 lb Cl₂). EPA guidelines endorse it over sodium bisulfite for lower sulfate byproduct formation. In gold mining, it's a greener lixiviant alternative to cyanide, recovering 92% Au per ICMM reports. Photography's "hypo" fixes images by dissolving unexposed silver halides.

Production at our Hebei facility starts with corn starch-derived fermentation for base chemicals, ensuring traceability. We employ PLC-controlled reactors at 50-60°C for thiosulfate synthesis, followed by vacuum evaporation, cooling crystallization (to 5°C), and centrifugation. Purity is verified via iodometric titration (ASTM E221), HPLC for impurities, and ICP-MS for metals. Each 25kg bag meets UN 2817 packaging for safe sea freight to USA ports like Long Beach.

Compared to competitors from India or Europe, our China supply chain advantage yields 25-30% lower FOB prices ($450-550/MT vs. $700+), with 15-day lead times via consolidated LCL shipping. For USA buyers, we handle FDA prior notice via our registered agent, ensuring seamless CBP clearance. Historical data from 2023 shipments to California food processors show 99.8% on-time delivery.

Safety profile: LD50 >5000 mg/kg (rat, oral), non-flammable, but avoid acids (releases SO2). Shelf life exceeds 2 years in PE-lined bags. Regulatory compliance includes REACH, TSCA, and Proposition 65. In 2025 projections, global demand hits 150,000 MT (Statista), driven by sustainable water tech and pharma growth post-COVID.

LSI terms like photographer's hypo, sodium hyposulfite, thio sulfate crystals, dechlorinating agent, and fixer solution underscore its multifunctionality. For procurement managers, selecting us means ROI via bulk discounts (5% off 20MT+), flexible MOQ (1MT), and T/T or L/C payments.

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