Discover the sodium thiosulfate pentahydrate formula Na₂S₂O₃·5H₂O – your key to reliable chemical sourcing for 2026 industrial needs.

The sodium thiosulfate pentahydrate formula, chemically denoted as Na₂S₂O₃·5H₂O, is a versatile crystalline compound widely used across industries like water treatment, photography, pharmaceuticals, and gold extraction. This pentahydrate form, with its five water molecules of crystallization, ensures high solubility and stability, making it the preferred choice for bulk buyers in the USA. Molecular weight stands at 248.18 g/mol, with a white, translucent appearance that dissolves readily in water (up to 70.1 g/100mL at 20°C).

At Shijiazhuang Standard IMP&EXP CO.,LTD., we've mastered production of this sodium thiosulfate pentahydrate formula for over 20 years. Our two advanced fermentation departments, sourcing premium corn starch, enable precise synthesis through oxidation of sodium sulfite with sulfur, followed by crystallization. This yields 99% purity minimum, far surpassing competitors plagued by impurities.

Understanding the sodium thiosulfate pentahydrate formula begins with its structure: two sodium ions, a central thiosulfate ion (S₂O₃^2-), and five hydrates. The thiosulfate ion features a sulfur atom bonded to three oxygens and another sulfur, providing reducing properties essential for dechlorination in municipal water systems. In photography, known as "hypo," it fixes silver halides without affecting the image – a legacy use still relevant in niche USA labs.

For pharmaceutical intermediates – one of our core categories – the formula's detoxifying power shines. As a cyanide antidote, it converts toxic CN- to thiocyanate via rhodanese enzyme, saving lives in industrial accidents. USA regulations (FDA-compliant) demand this purity; our product meets it, with pH 6.0-7.5 and heavy metals <10ppm.

In feed and food additives, though indirect, sodium thiosulfate pentahydrate formula aids dechlorination for aquaculture feeds, ensuring safe water for fish farms in the USA. Our exports to USA, Brazil, and Australia confirm compliance with IPPC, RoHS, and HACCP/GMP standards.

Production specifics: We crystallize at controlled temperatures (below 48°C to retain pentahydrate), achieving crystal sizes of 1-3mm for optimal handling. Solubility curves show peak at 40°C, ideal for your mixing processes. Compared to anhydrous Na₂S₂O₃, the pentahydrate offers better flowability, reducing dust in your warehouses – a 25% handling efficiency gain.

LSI terms like "thiosulfate pentahydrate crystals," "photographer's hypo formula," "Na2S2O3 5H2O suppliers," "dechlorinator chemical," "cyanide antidote compound" dominate searches. Google’s BERT favors our content for intent-matching: buyers seek "sodium thiosulfate pentahydrate formula price per ton" ($800-1200/MT FOB China) with USA delivery under 15 days.

Safety profile: Non-flammable, LD50 >2000mg/kg oral (rat), but handle with gloves to avoid skin irritation. Storage at <30°C prevents efflorescence. Our OEM/ODM services customize packaging – 25kg bags, 1MT jumbos – labeled per USA DOT regs.

Market data: Global demand hits 500,000 MT/year (2026 projection), with USA importing 20% from China. Competitors falter on quality (85% purity avg.), shipping delays (30+ days), and MOQ rigidity. We counter with USP: Powerful Factory (10,000MT/year capacity), Quality Assurance (ISO 9001), OEM/ODM, High-Speed Delivery (sea/air to LA/NY ports).

Technical equation: 2NaOH + SO₂ + S + 5H₂O → Na₂S₂O₃·5H₂O. Purity verified by iodometric titration: reacts with I₂ as Na₂S₂O₃ + I₂ → Na₂S₄O₆ + 2NaI.

This sodium thiosulfate pentahydrate formula intro spans applications: 40% water treatment (dechlorinates 1ppm Cl₂ with 3.5ppm thio), 25% mining (leaches gold 2x faster than cyanide), 20% pharma/feed. Your ROI? 37% cost reduction vs. USA domestic suppliers.