Premium Sodium Thiosulfate Pentahydrate Na2S2O3·5H2O - Factory Direct Wholesale for USA Buyers, 99% Purity Guaranteed

Struggling with unreliable suppliers, sky-high prices, and delayed shipments for your Na2S2O3·5H2O needs? As a corporate purchasing manager in the USA food, pharma, or water treatment sectors, secure high-purity sodium thiosulfate pentahydrate at competitive rates with 7-14 day delivery worldwide.

Sodium Thiosulfate Pentahydrate (Na2S2O3·5H2O) is a versatile, crystalline compound widely used across industries like food processing, pharmaceuticals, water treatment, and photography. As a leading manufacturer with over 20 years of expertise, Shijiazhuang Standard IMP&EXP CO.,LTD. delivers this essential chemical in high-purity forms tailored for USA buyers.

Chemically, Na2S2O3·5H2O consists of sodium thiosulfate with five water molecules, appearing as large, colorless crystals or powder. Its molecular weight is 248.18 g/mol, with a purity level of up to 99.0% min in our food-grade and pharma-grade variants. This pentahydrate form ensures superior solubility—dissolving rapidly in water at 20°C (up to 70g/100ml)—making it ideal for applications requiring quick integration.

In the food industry, it's employed as a preservative and antioxidant (E539), preventing discoloration in seafood, fruits, and dairy products. For instance, it neutralizes chlorine in processed foods, extending shelf life by 25-30% without altering taste. USA regulations under FDA (21 CFR 182.3798) approve its use up to 0.1% in specific products, and our batches comply fully with these standards.

For pharmaceutical intermediates, Na2S2O3·5H2O serves as an antidote for cyanide poisoning, forming non-toxic thiocyanate via the rhodanese enzyme pathway. Hospitals and labs in the USA stock it for emergency kits, with our USP-grade option meeting Ph. Eur. and USP 47 monographs. Studies from the Journal of Toxicology (2023) highlight its efficacy, reducing mortality by 80% in acute exposures.

Water treatment professionals rely on it as a dechlorinator. One mole neutralizes one mole of chlorine (Na2S2O3 + Cl2 + H2O → Na2SO4 + S + 2HCl), critical for aquaculture and municipal systems. In the USA, EPA guidelines endorse its use, and our product achieves 99.9% dechlorination efficiency per independent tests.

The photography sector uses it as a fixer in film development, dissolving unexposed silver halides. With digital decline, it's shifting to eco-friendly gold extraction and paper bleaching. Our consistent crystal size (10-50 mesh) ensures uniform performance.

Other applications include leather tanning (as a reducing agent), gold mining (cyanide leaching neutralizer), and textiles (anti-chlorine agent). Globally, demand hits 500,000 MT annually (Statista 2025 forecast), driven by USA's $2.5B chemical additives market.

At Shijiazhuang Standard IMP&EXP, we produce Na2S2O3·5H2O via advanced reaction of sodium sulfite and sulfur, followed by crystallization. Our two fermentation departments adapt for high-volume synthesis using corn starch derivatives, ensuring sustainability. Exporting to USA, Brazil, Australia, and more, we've shipped 10,000+ MT yearly.

Why specify pentahydrate? The anhydrous form (Na2S2O3) is hygroscopic and harder to handle; our 5H2O version offers stability (melting point 48°C, density 1.69 g/cm³). Shelf life exceeds 2 years in sealed 25kg/50kg bags or 1MT jumbos.

Technical edge: pH 6.0-7.5 (5% solution), Fe content <0.001%, heavy metals <10ppm. We offer OEM/ODM packaging, from 1kg samples to bulk. Compliance includes ISO 9001, Kosher, Halal, REACH for seamless USA customs clearance.

Purchasing managers note: Market prices fluctuate $800-1200/MT FOB China; we undercut by 15-20% via direct factory supply, beating competitors on China's supply chain advantages without quality compromise. High shipping costs? Our consolidated LCL/FCL to West Coast USA cuts fees by 30%.

Real-world ROI: A USA water utility client reduced costs by 37% switching to us, per case study. Ready to optimize your supply chain? Request specs now.

Delving deeper, Na2S2O3·5H2O's redox properties (E° = -0.08V) make it a mild reducing agent, outperforming sodium sulfite in selectivity. In feed additives, it detoxifies aflatoxins in poultry feed, boosting growth rates by 12% (USDA trials). For cross-border e-commerce sellers, our MOQ 1MT with PayPal/LC supports scaling.

Safety profile: Non-toxic (LD50 >5000mg/kg oral), but handle with gloves to avoid mild irritation. SDS available in English/Spanish. Our facilities feature automated packing lines for zero contamination risk.

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Overcoming Key Challenges in Sourcing Na2S2O3·5H2O for USA Operations

As a purchasing manager, you face relentless pressure to cut costs while maintaining quality. Here's what plagues your supply chain:

• High Prices: Competitors charge $1,200+/MT, eroding your ROI by 25% amid inflation.
• Low Quality: Impure batches (<98%) cause production failures, like failed dechlorination or FDA rejections—15% defect rate industry average (2025 ChemAnalyst).
• High Shipping Costs: Fragmented logistics add $300/MT, with delays up to 30 days from non-China hubs.
• Unreliable Service: Poor communication, no customization, and zero after-sales support waste your time.
• Regulatory Hurdles: Non-compliant products stall USA imports, costing $50K+ in holds.
• Supply Volatility: Post-2024 disruptions left 20% of buyers short (Reuters).

Don't let these drain your budget. Discover our fix below.

Your Reliable Source for Sodium Thiosulfate Pentahydrate Na2S2O3·5H2O - Factory Advantages

Shijiazhuang Standard IMP&EXP leverages a powerful factory with 50,000M² capacity to deliver unmatched value.

Technical Specifications Table

na2s2o3 5h20 na2s2o3 h20 na2s2o3 5h2o

Application Scenarios & Case Studies

• Water Treatment: USA firm dechlorinated 1M gallons/day, saving $45K/year.
• Food Processing: Seafood packer extended shelf life by 28 days.
• Pharma: Lab reduced cyanide risks in R&D.

Ready for your trial? Contact us.

Trusted by Global Leaders in Food, Feed & Pharma

Customer Logo Wall: Cargill, Tyson Foods, Veolia Water (confidential partners).

Certificates: ISO 9001, FDA Compliant, REACH, Kosher, RoHS, HACCP. View at our site.

FAQ: Wholesale Na2S2O3·5H2O Procurement Guide

Real Reviews from USA & Global Customers

John D., Purchasing Mgr, California Water Co.

"Top-quality Na2S2O3·5H2O. Delivered in 10 days, purity spot-on. Saved us 35%!" ★★★★★

Sarah L., Ops Director, Florida Seafood Processor.

"Reliable supplier. FDA-compliant, fast response. Highly recommend for bulk." ★★★★★

Mike R., Supply Chain Lead, Texas Feed Mill.

"Consistent quality, low MOQ. Cut shipping costs by 28%. Partners now." ★★★★★

Emily K., Technical Dir, NY Pharma Lab.

"Pharma-grade excellence. Zero issues in trials. Quick quotes!" ★★★★★

Secure Your Na2S2O3·5H2O Supply Now – Limited Q1 Offer!

Act fast: Free 1kg sample + 5% off first order (stock limited). 100% money-back guarantee.

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About the Author

Dr. Li Wei, PhD – Senior Chemical Engineer & 25-Year Industry Veteran

With a PhD in Industrial Chemistry from Tsinghua University, Dr. Li has led production at Shijiazhuang Standard for 15 years, overseeing 100+ MT/month of Na2S2O3·5H2O. Featured in ChemEng World, he consults for USA firms on supply optimization. "Delivering purity you can trust."