Description
Specifications Table
| Product Name | Sodium thiosulfate, pentahydrate ARS, ACS |
|---|---|
| Pack Size | 500g | 1kg | 5kg |
| Form | Crystalline powder |
| Grade | ARS, ACS |
| Application | Titration, iodine analysis, chlorine removal, photography |
Product Description
Sodium thiosulfate pentahydrate is a versatile laboratory reagent widely used in analytical chemistry, photography, and water treatment. This ARS and ACS-grade product from Avantor ensures high purity and consistency, making it ideal for critical applications like iodometric titrations, chlorine neutralization, and silver halide processing in photography.
Whether you’re a student conducting experiments or a researcher requiring precise results, this sodium thiosulfate pentahydrate delivers reliable performance. Its stable crystalline form dissolves easily in water, providing accurate molar solutions for volumetric analysis. For those looking to buy sodium thiosulfate ACS grade online, eqipped offers authentic Avantor products with fast shipping across India.
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The pentahydrate form is particularly valued in educational labs for its long shelf life and ease of handling. It serves as a reducing agent in various chemical reactions and is commonly used to dechlorinate water samples before analysis. Researchers in environmental science and chemistry rely on this grade for its compliance with stringent analytical standards.
When purchasing sodium thiosulfate pentahydrate, always verify the grade matches your application requirements. The ARS (Analytical Reagent Standard) and ACS (American Chemical Society) certifications ensure minimal impurities, which is crucial for sensitive tests. eqipped sources directly from Avantor to maintain product integrity from manufacturer to your lab bench.
Key Applications
This sodium thiosulfate pentahydrate finds use in multiple laboratory and industrial scenarios:
In analytical chemistry, it’s the standard titrant for iodine determinations, where its precise stoichiometry allows accurate quantification. Photographers use it as a fixing agent to dissolve unexposed silver halides, while water treatment facilities employ it to neutralize excess chlorine after disinfection.
Medical laboratories utilize it as an antidote for cyanide poisoning, though this application requires specialized protocols. For educational purposes, it’s often included in chemistry kits for demonstrating redox reactions and complex formation.
Safety and Handling
While generally low in toxicity, proper handling is recommended. Always wear appropriate PPE including gloves and goggles when working with chemical reagents. Store in a cool, dry place away from direct sunlight and incompatible substances like strong acids.
Looking for a trusted sodium thiosulfate pentahydrate supplier? eqipped provides lab-grade chemicals with detailed safety documentation.
Why This Grade Matters
The ARS and ACS designations indicate this product meets rigorous purity standards. For research and quality control applications, using certified-grade chemicals eliminates variables that could affect results. The pentahydrate form offers better stability than anhydrous versions, making it preferable for most laboratory applications.
When you buy sodium thiosulfate pentahydrate online from eqipped, you receive products with full traceability and certificate of analysis upon request. This transparency is particularly important for academic institutions and research facilities maintaining quality assurance protocols.
FAQs
What is the difference between AR and ACS grade sodium thiosulfate?
ARS (Analytical Reagent Standard) and ACS (American Chemical Society) grades both indicate high purity, but ACS certification follows stricter testing protocols. For most laboratory applications, either grade is suitable, though ACS is preferred for official analytical methods.
Can I use this for photography developing?
Yes, this sodium thiosulfate pentahydrate is suitable for photographic fixing. The ACS grade ensures minimal impurities that could affect image quality. Follow standard darkroom procedures for proper dilution and usage.
What’s the shelf life of sodium thiosulfate pentahydrate?
When stored properly in sealed containers away from moisture, the product maintains stability for 2-3 years. The pentahydrate form is less prone to efflorescence than other hydrate forms.
How do I prepare a 0.1N sodium thiosulfate solution?
Dissolve 24.82g of sodium thiosulfate pentahydrate in distilled water and dilute to 1 liter. Standardize against potassium dichromate for accurate normality. Always use freshly prepared solutions for critical titrations.
Is this product suitable for food or pharmaceutical applications?
While sodium thiosulfate has medical uses, this specific product is labeled for laboratory use only. For food or pharmaceutical applications, you would need USP or food-grade certified products with appropriate documentation.
