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Sodium thiosulfate, MF: Na₂S₂O₃, MW: 158.108, appears as a white crystalline powder, odorless, with a salty taste. Highly soluble in water, insoluble in ethanol. Commonly found as the pentahydrate (Na₂S₂O₃・5H₂O, MW 248.18), also known as sodium thiosulfate pentahydrate or sodium thiosulphate. Exhibits strong reducing properties and coordination ability, highly hygroscopic.
| Item | Specification |
| Melting point | 48°C |
| Boiling point | 100°C |
| Bulk density | 1350 kg/m³ |
| Density | 1.667 g/cm³ (at 20°C) |
| Specific Gravity | 1.667 |
| PH | 6.0-8.5 (25°C, 50mg/mL in H₂O) |
| Flash point | N/A |
| Solubility | Highly soluble in water; insoluble in ethanol. |
Industrial Applications:
– Dechlorination of drinking water and wastewater;
– As a complexing agent in silver and copper plating;
– Dechlorinating agent after bleaching in textiles and papermaking;
– Fixing agent in traditional film processing.
Sodium thiosulfate for emergency treatment of cyanide poisoning; 5% solution applied as a wet compress to treat skin itching, eczema, dyshidrosis, etc.
Food Industry:
– As an antioxidant, bleaching agent, and chelating agent;
– To remove excess sulfur dioxide generated during brewing fermentation and adjust flavor.
HYPO Cas 7772-98-7 is the core reagent in iodometric titration and can also serve as a masking agent.
It is used for plant disease prevention and control, soil pH adjustment; removes iodine and ink stains from clothing.
Jinan Jinbang Chemical Co., Ltd., strategically located within the New Materials Industrial Park in Tianqiao District, Jinan City, Shandong Province, stands as a prominent chemical innovator since its establishment in 2015. Operating from a modern, expansive 37,500 m² manufacturing facility, we are dedicated to the research & development, production, and global distribution of high-performance chemical solutions.
We are always committed to delivering optimal chemical solutions for all application scenarios.
