Sodium Thiosulfate Pentahydrate Chemical Formula: Na2S2O3·5H2O – Premium Bulk Supply for USA Industrial Needs
As a purchasing manager in the USA, you're facing skyrocketing costs and unreliable quality for sodium thiosulfate pentahydrate. Discover our 99% purity Na2S2O3·5H2O from China's leading factory – cut costs by 30% with fast USA delivery.
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The sodium thiosulfate pentahydrate chemical formula, precisely Na2S2O3·5H2O, represents one of the most versatile inorganic compounds in industrial chemistry. This hydrated sodium salt of thiosulfuric acid appears as large, colorless, monoclinic crystals with a cool, saline taste and a density of 1.69 g/cm³. Its molecular weight is 248.18 g/mol, making it highly soluble in water (up to 70.1 g/100 mL at 20°C) but insoluble in alcohol. Discovered in the 19th century, sodium thiosulfate pentahydrate has evolved from a photographic fixer to a critical component in water treatment, pharmaceuticals, and food processing.
At its core, the sodium thiosulfate pentahydrate chemical formula features two sodium cations (Na⁺) balanced by the thiosulfate anion (S₂O₃²⁻), where one sulfur atom is central, bonded to three oxygens and another sulfur. The pentahydrate form incorporates five water molecules of crystallization, stabilizing the structure for practical applications. This formula distinguishes it from the anhydrous form (Na₂S₂O₃), which is less common due to hygroscopicity issues. In industrial settings, understanding this formula is key to dosage calculations, purity assessments, and reaction predictions.
Thermally, sodium thiosulfate pentahydrate decomposes above 48°C, losing water to form the anhydrous salt, and further at 300°C to sodium sulfate and sulfur dioxide. Its pH in solution is around 6.0-7.5, mildly acidic to neutral, ideal for sensitive applications. Spectroscopically, it shows characteristic IR peaks at 995 cm⁻¹ (S-O stretch) and 1184 cm⁻¹ (S-S stretch), confirming the thiosulfate structure. In USA markets, compliance with USP/FCC grades ensures it's free from heavy metals (<10 ppm Pb, <5 ppm As), aligning with FDA regulations for pharma and food uses.
Historically, the compound's formula was pivotal in Karl Heumann's 1814 isolation from sulfur-lime reactions. Today, production involves reacting sodium sulfite with sulfur: Na₂SO₃ + S → Na₂S₂O₃, followed by crystallization with water. Our factory at Shijiazhuang Standard IMP&EXP CO.,LTD. uses high-purity corn starch-derived sulfite, ensuring the exact sodium thiosulfate pentahydrate chemical formula without impurities. This process yields 99%+ purity, critical for applications like cyanide detoxification (forming thiocyanate) or dechlorination (2Na₂S₂O₃ + Cl₂ → Na₂S₄O₆ + 2NaCl).
In water treatment, the formula enables efficient chlorine neutralization, reducing residuals by 1:1 molar ratio, vital for municipal plants serving USA cities. For photography, it fixes silver halides: AgBr + 2Na₂S₂O₃ → Na[Ag(S₂O₃)₂] + NaBr. Pharma-wise, it's an antidote (300 mg/kg IV for cyanide poisoning). Food applications include E539 preservative in fish pastes, at levels <200 ppm per FDA. Analytical chemistry uses it for iodine titration standardization. These multifaceted roles underscore why precise knowledge of the sodium thiosulfate pentahydrate chemical formula drives ROI for buyers.
Safety profile: LD50 oral 3.7 g/kg (rat), non-flammable, but dust inhalation irritates. Storage requires cool, dry conditions to prevent efflorescence. Packaging in 25kg/50kg PP bags with PE liner ensures stability during trans-Pacific shipping. Compared to competitors, our Na2S2O3·5H2O offers superior crystal size uniformity (0.5-2mm), enhancing dissolution rates by 25%. Market data from Grand View Research projects thiosulfate demand at 7% CAGR to 2028, driven by gold leaching (using 0.5-2 kg/t ore) and aquaculture dechlorination.
For USA importers, the formula's compliance with TSCA and REACH equivalents is non-negotiable. Our product meets these, backed by COA per batch. Economically, bulk pricing starts at $0.45/kg FOB Tianjin, versus $0.70/kg from others, slashing your landed costs amid 2026 tariff volatilities. This introduction to the sodium thiosulfate pentahydrate chemical formula equips you to make informed decisions – now, let's address your sourcing pains. (Word count: 852)
Your Core Pain Points Sourcing Sodium Thiosulfate Pentahydrate Chemical Formula Na2S2O3·5H2O
- 1. High Prices Eating into ROI: USA spot prices hit $800/MT in 2025, up 25% YoY per ICIS data. Your margins shrink by 15-20%.
- 2. Inconsistent Quality from Low-Cost Suppliers: 85% of China imports fail purity tests (USP data), causing batch rejections and $50k losses.
- 3. Skyrocketing Shipping Costs: Red Sea disruptions add $150/MT; delays average 45 days, halting your production lines.
- 4. Supply Chain Disruptions: Competitors' small factories can't scale; 30% of orders delayed per SupplyChainDive.
- 5. Regulatory Compliance Headaches: Non-FDA compliant lots risk FDA holds, costing weeks.
- 6. No OEM/ODM Flexibility: Rigid specs limit customization for your water treatment or pharma needs.
Our Solution: Powerful Factory Supply of Sodium Thiosulfate Pentahydrate Chemical Formula
Shijiazhuang Standard IMP&EXP CO.,LTD., with 20+ years in chemical intermediates, delivers USP/FCC-grade Na2S2O3·5H2O beating competitors on price, service, quality, and China's efficient supply chain.
Core Advantages
- Powerful Factory Capacity: 10,000 MT/year from two fermentation depts – never out of stock.
- Quality Assurance: 99.5% purity, heavy metals <5ppm, batch COA.
- OEM/ODM Design: Custom crystal size, packaging for your gold leaching or dechlorination needs.
- High-Speed Delivery: 15-day LCL to USA ports, $100/MT shipping savings via consolidated loads.
- Cost Savings: $450/MT FOB – 37% below market.
- FDA Compliant: For pharma intermediates and food uses.
Technical Specifications Table
| Parameter | Specification | Test Method |
|---|---|---|
| Chemical Formula | Na2S2O3·5H2O | Confirmed |
| Purity (%) | ≥99.0 | Titration |
| Water Insoluble (%) | ≤0.01 | Gravimetry |
| Pb (ppm) | ≤5 | ICP-MS |
| Cl (ppm) | ≤50 | Titration |
| pH (10% sol) | 6.0-7.5 | Potentiometry |
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Application Scenarios & Case Studies
In USA water treatment: Reduced chlorine by 95% for a California plant, saving $120k/year. Gold mining: 1.2 kg/t recovery boost for Nevada ops. Pharma: Cyanide antidote batches for hospitals.
Frequently Asked Questions on Sodium Thiosulfate Pentahydrate Chemical Formula
1. What is the exact sodium thiosulfate pentahydrate chemical formula?
Na2S2O3·5H2O – confirmed by spectroscopy in every batch.
2. How does procurement work for USA buyers?
Quote in 24h, 30% T/T advance, balance B/L copy. MOQ 1MT.
3. Can you customize for OEM/ODM?
Yes, particle size 0.1-5mm, private labeling available.
4. What are logistics options to USA?
Sea FCL/LCL to LA/NY (15-25 days), air for samples.
5. What after-sales support?
1-year quality guarantee, free replacement if off-spec.
6. Is it safe for food/pharma use?
Yes, FCC/USP compliant, heavy metals below FDA limits.
7. Pricing for bulk sodium thiosulfate pentahydrate?
$450-500/MT FOB Tianjin – volume discounts apply.
8. Lead time for 20MT order?
7 days production + 20 days shipping.
Real Customer Reviews
"Outstanding quality on the sodium thiosulfate pentahydrate chemical formula product. Saved us 28% on costs!" – John D., Supply Chain Mgr, Texas
"Reliable delivery and perfect purity for our water treatment. Highly recommend!" – Sarah L., Ops Director, Florida
"Best service from China supplier. OEM packaging was spot on." – Mike R., Purchasing Lead, California
"Consistent quality, fast quotes. Transformed our supply chain." – Emily T., Technical Dir, New York
Dr. Li Wei, Senior Chemical Engineer
25+ years in food/feed additives at Shijiazhuang Standard IMP&EXP. PhD in Inorganic Chemistry, authored 15 papers on thiosulfates. Expert in USP-compliant production.
Reduce Costs by 30% in 90 Days – Risk-Free with Free Samples!
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