Product Description
Basic Information: Sodium thiosulfate/Hypo
chemical formula: Na2S2O3.5H2O
Appearance: Usually colorless and transparent monoclinic crystals, and can also be in the form of colorless or white crystalline powder.
Odor and Taste: Odorless, with a cool feeling and a bitter taste.Sodium thiosulfate, with the chemical formula Na2S2O3 (often as pentahydrate Na2S2O3.5H2O), is a colorless crystalline compound also known as in Chinese and "hypo" in industrial contexts like photography. Highly soluble in water, it forms a slightly alkaline solution and decomposes above 100°C while melting at ~48°C as the pentahydrate. As a reducing agent, it reacts with iodine in titrations and releases and elemental sulfur when exposed to acids. Used as a primary standard in iodometric analysis, a photographic fixer to remove unexposed silver halides, an antidote for cyanide poisoning, and in industries like textiles, wastewater treatment, and leather tanning, it should be stored in cool dry places away from acids to prevent efflorescence or toxic SO2 release.
Product Parameters
| ITEMS |
UNIT |
QUALITY STANDARD |
RESULTS
|
| Sodium Thiosulfate Content (Mass Fraction as Na2S2O3·5H2O) |
% |
≥98.0 |
99.01 |
| Ferric Content(Mass Fraction as Fe) |
% |
≤0.002 |
0.001 |
| Water Insoluble Substance (Mass Fraction) |
% |
≤0.01 |
0.002 |
Sulfide Content
(Mass Fraction as Na2S) |
% |
≤0.001 |
0.0008 |
| Sodium Chloride Content (Mass Fraction Basis for NaCl ) |
% |
≤0.05 |
0.04 |
| PH Value(200g/L solution) |
- |
6.5-9.5 |
8.0 |
| Appearance |
Transparent crystalline particles |
Conclusion
|
Qualified |
Application
In the intricate domain of photography, sodium thiosulfate serves as an indispensable fixing agent, meticulously halting the development process by dissolving unexposed silver halides from photographic emulsions, thus preserving the captured image with precision. Concurrently, within the specialized field of leather tanning, this versatile compound assumes dual roles as both a reducing agent and a mordant for dichromate salts, skillfully mediating the complex redox reactions and coordinate bonding essential for cross-linking collagen fibers, thereby ensuring the structural integrity and durability of tanned leather through its multifaceted chemical interactions.
Sodium thiosulfate, through its unique chemical reactivity, emerges as a pivotal solution by engaging in intricate stoichiometric reactions that yield insoluble sulfide precipitates with specific heavy metal ions; this mechanism not only enables the systematic removal of these toxic species from wastewater streams but also orchestrates a comprehensive purification process, effectively mitigating the environmental contamination caused by industrial discharges and underscoring the compound's critical role in sustainable wastewater treatment paradigms.As a standard reagent for redox titration, it is used to standardize iodine (I2). Sodium thiosulfate itself can also be standardized by primary standards such as (K2Cr2O7), serving as a core reagent in iodometric methods.
In the complex landscape of industrial wastewater management, effluents frequently contain a diverse array of pernicious heavy metal ions, with lead standing as a prime example, whose persistence in the environment poses severe ecological risks and significant threats to biological systems. As a reducing agent, it reacts with iodine in titrations and releases and elemental sulfur when exposed to acids. Used as a primary standard in iodometric analysis, a photographic fixer to remove unexposed silver halides, an antidote for cyanide poisoning, and in industries like textiles, wastewater treatment, and leather tanning, it should be stored in cool dry places away from acids to prevent efflorescence or toxic SO2 release.
Packaging & Shipping
Packing: Package in 25/500 Kg bag, also accpet customer OEM packing.
Storage: Keep in a cool, dry, dark location in a tightly sealed container or cylinder.
Certifications and Reviews
Company Profile
Shandong Jiuchong Chemical Company Limited was founded in 2016, which is located in Weifang City, Shandong Province, China. We have 228 square meters of office space. Now Jiuchong chemical is a large modern international chemical enterprise with more than 28 series. Since our establishment, the company has gradually established and improved a sound supply chain system, quality monitoring system and service system, ensuring products quality and service.
At the same time, relying on our own geographical location and resource advantages, our company is committed to the optimization of a variety of chemical supply chain, including magnesium chloride, sodium metabisulfite, sodium bicarbonate, calcium chloride, magnesium sulfate, polyaluminium chloride, aluminium sulfate, industrial salt, soda ash etc. Our products are sold well in 288 domestic cities and more than 36 foreign countries. Now the company has won the praise and trust of domestic and foreign customers. Based on stable quality and output, good team service and staff efforts, we will continue to develop domestic and foreign markets.
Jiuchong chemical takes "integrity, innovation and development" as the concept, puts integrity in the priority position in serving customers, and guarantees high quality products and satisfactory cooperation for customers experience. Your satisfaction is our driving force. Quality is the soul of enterprise and that is what we have always done. In the future, Shandong Jiuchong Chemical Company Limited hopes to build a brilliant tomorrow with you!
FAQ
Q: How long is your delivery time?
A: It usually takes 7-10 days if the goods are in stock, or 10-15 days if the goods are not, depending on the quantity ordered.
Q: Can you support OEM ?
A: Yes, we can make products as your request.
Q: Do you provide samples?
A: Yes, we could offer the sample for free by requests but are not responsible for the freight cost.
Q: What payment terms do you accept?
A: We accept T/T, L/C at sight;
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