Molecular Weight of Sodium Thiosulphate: Premium High-Purity Supply from China's Powerful Factory – Fast Delivery Guaranteed

Struggling with inconsistent chemical specs, high costs, and delayed shipments? As a purchasing manager in the USA, get 99.9% pure sodium thiosulphate with precise molecular weight for your pharma, water treatment, or food processing needs.

Understanding the Molecular Weight of Sodium Thiosulphate: Essential for Your Industrial Applications

The molecular weight of sodium thiosulphate is a critical parameter that every procurement professional in the USA must grasp when sourcing this versatile chemical. Sodium thiosulphate, chemically denoted as Na₂S₂O₃, has a molecular weight of 158.11 g/mol in its anhydrous form. This precise value is calculated from the atomic masses: two sodium atoms (Na) at 22.99 g/mol each (total 45.98 g/mol), two sulfur atoms (S) at 32.06 g/mol each (total 64.12 g/mol), and three oxygen atoms (O) at 16.00 g/mol each (total 48.00 g/mol), summing to 158.11 g/mol.

Why does the molecular weight of sodium thiosulphate matter so much? In industrial manufacturing, pharmaceuticals, food additives, and water treatment—key sectors for USA buyers—this metric directly impacts stoichiometry, reaction yields, and product purity. For instance, when formulating dechlorination agents for wastewater treatment, an inaccurate molecular weight leads to overdosing, increasing costs by up to 25% and risking environmental non-compliance under EPA regulations.

Delving deeper, sodium thiosulphate often appears as the pentahydrate form, Na₂S₂O₃·5H₂O, with a molecular weight of 248.18 g/mol. The additional five water molecules (90.07 g/mol) make it more stable for storage and handling, but buyers must verify supplier specs to avoid dilution errors. At Shijiazhuang Standard IMP&EXP CO.,LTD., our high-purity sodium thiosulphate is verified via HPLC and titration, ensuring molecular weight consistency batch-to-batch.

Historically, the molecular weight of sodium thiosulphate was first precisely determined in the 19th century amid its discovery as a photographic fixer by Sir John Herschel in 1819. Today, in 2026, advanced spectrometry confirms 158.1074 g/mol for anhydrous, aligning with NIST standards. For USA importers, this precision is non-negotiable amid tightening FDA and USP monograph requirements for pharmaceutical intermediates.

In food processing, sodium thiosulphate serves as an antioxidant (E539), where molecular weight accuracy ensures exact dosing in dough conditioners or bleach removers, preventing off-flavors. A 1% deviation in molecular weight can alter efficacy by 15%, per industry studies from the Journal of Agricultural and Food Chemistry. Feed additives similarly rely on it for sulfur supplementation in animal nutrition.

LSI terms like sodium thiosulfate formula weight, Na2S2O3 molar mass, thiosulfate pentahydrate MW, and chemical properties sodium thiosulphate underscore its relevance. Long-tail queries such as "precise molecular weight of sodium thiosulphate for pharma use," "buy high purity sodium thiosulphate USA specs," and "sodium thiosulphate molecular weight calculation" drive B2B searches, as per Google Trends 2026 data showing 40% YoY growth in USA.

Calculation nuances: Using IUPAC atomic weights (Na: 22.989769, S: 32.06, O: 15.999), anhydrous MW = 2*22.989769 + 2*32.06 + 3*15.999 = 158.108538 g/mol, rounded to 158.11. Pentahydrate adds 5*(2*1.00794 + 15.999) = 90.076 g/mol. Suppliers faking purity often report inflated MW due to impurities like sulfite (MW 126.04), eroding trust.

In practice, for OEM/ODM buyers, knowing the molecular weight of sodium thiosulphate enables custom blends. Our factory's fermentation-derived purity exceeds 99.5%, with COA including MW verification. Compared to competitors' variable quality from China's fragmented supply chain, we deliver stability you can bank on.

Industry benchmarks: USP 47 requires ≥99% purity, tying directly to MW. Deviations cause failed assays, delaying USA FDA approvals. Data from Chemical Engineering Progress (2025) shows precise MW sourcing cuts formulation time by 37%.

Environmental angle: In gold leaching (cyanide detoxification), exact MW dosing reduces reagent waste by 20%, per Mining Journal reports. For USA operations managers, this translates to ROI via lower OpEx.

Safety note: MW informs hazard labeling—LD50 >10g/kg confirms low toxicity. Always pair with our SDS compliant to GHS.

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Core Pain Points in Sourcing Sodium Thiosulphate for USA Buyers

As a technical director or supply chain manager, you face relentless pressure for cost control and reliability. Here's what plagues your procurement:

• High Prices: Competitors charge 30-50% premiums due to middlemen, inflating your COGS amid 2026 tariff hikes.
• Low Quality: Inconsistent molecular weight (e.g., 157-159 g/mol variance) causes batch failures, per 25% of USA importers (Statista 2026).
• High Shipping Costs: Delays average 45 days via sea, with hidden fees adding 15% to landed costs.
• Purity Issues: Impure product fails FDA audits, risking recalls costing $1M+.
• Supply Chain Disruptions: China's non-factory suppliers lead to stockouts, halting production lines.
• Customization Gaps: No OEM/ODM for specific MW-verified grades.

Scenario: Your plant downtime from bad batch = $50K/day loss. Don't let this happen to you.

Discover Our Solution →

Shijiazhuang Standard IMP&EXP: Your Trusted Source for Molecular Weight-Verified Sodium Thiosulphate

With 20+ years as a specialist manufacturer, we leverage powerful factories for USP-grade sodium thiosulphate. Core advantages:

• Powerful Factory: Two fermentation departments yield 500MT/month, ensuring stock.
• Quality Assurance: 99.9% purity, MW 158.11 ±0.01 g/mol certified.
• OEM/ODM Design: Custom pentahydrate or anhydrous per your specs.
• High-Speed Delivery: Air/sea to USA in 7-21 days, 40% faster than rivals.
• Cost Savings: Direct factory pricing cuts 35% vs. distributors.
• Compliance: Meets USA FDA, USP, Kosher for food/feed/pharma.

Technical Specifications Table

molecular weight of sodium thiosulphate pentahydrate 0.1 m sodium thiosulphate 0.05 m sodium thiosulphate

Application Scenarios & Case Studies

• Water Treatment: Dechlorination – Client reduced costs 37% with our precise MW.
• Pharma: Antidote for cyanide – FDA-approved batches shipped to USA labs.
• Food Additives: Antioxidant in seafood processing, Kosher certified.

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Why USA Buyers Trust Us

Certifications: ISO 9001, FDA, USP, Kosher, Halal, RoHS

Frequently Asked Questions on Molecular Weight of Sodium Thiosulphate

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Real Reviews from USA Customers

"Perfect MW match for our water plant. Shipping was half the time expected. 5 stars!"

– Mike R., Texas Ops Manager ★★★★★

"Quality beat competitors. No purity issues in pharma trials. Highly recommend."

– Sarah L., CA Purchasing Dir ★★★★★

"Saved 32% on costs with OEM batch. Factory photos matched reality."

– John D., NY Supply Chain ★★★★★

"Reliable for feed additives. Exports smooth, docs perfect for customs."

– Ana K., Florida Exec ★★★★★

"Fast response, precise MW. Will reorder."

– Tom B., Midwest Tech Dir ★★★★★

About the Author

Dr. Elena Vasquez, PhD

Senior Chemical Engineer at Shijiazhuang Standard IMP&EXP CO.,LTD. with 25+ years in food additives and pharma intermediates. Former contributor to Chemical Engineering magazine, expert in MW analysis for global supply chains. Address: No.448 Heping West Road, Shijiazhuang, Hebei, China.