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Sodium Thiosulfate
Sodium Thiosulfate (Na₂S₂O₃) – Versatile Reducing Agent for Photographic & Water Treatment Applications
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Product Name: Sodium Thiosulfate
Product Details:
1.Chemical Formula: Na₂S₂O₃
2.Common Name: Hyposulfite
3.Appearance: Colorless monoclinic crystal system (Small/Medium/Large particles)
4.Specification: Sodium thiosulfate pentahydrate(Na₂S₂O₃·5H₂O)
5.Purity: 99%
6.Applications:
● Photographic Industry: Act as a fixing agent by removing unexposed silver halide through chemical complexation, ensuring permanent clarity.
● Water Treatment: Widely used for dechlorination, heavy metal removal, and oxidant neutralization due to its reducing properties, complexation ability, and low toxicity.
● Detergents: Improve cleaning by dechlorination, bleach stabilization, stain removal and color care, ideal for high-end/colored/delicate fabrics.
● Electroplating: Key for cyanide-free/precious metal plating and post-treatment with its low toxicity and strong complexing/reducing abilities.
7.Shelf life: 1 year
8.Packaging: 25/50kg bags, supporting ton bags.
9.Storage: Store in dry, ventilated, cool warehouses. Avoid contact with strong acids/alkalis and reducing agents.
Product parameters
| ITEM | INDEX | ||
| Superior Grade | First Grade | ||
| Sodium thiosulfate (Na₂S₂O₃•5H₂O)/% | ≥ | 99.0 | 98.0 |
| Water insoluble matter /% | ≤ | 0.01 | 0.03 |
| Sulfide (in Na₂S)/% | ≤ | 0.001 | 0.003 |
| Iron (Fe)/% | ≤ | 0.002 | 0.003 |
| Sodium chloride (NaCl)/% | ≤ | 0.05 | 0.20 |
| pH value (200g/L solution) | 6.5~9.5 | ||
FAQ
Q: Are you a factory or a trading company?
A: We are a factory with our own production lines. And we cooperate with several chemical factories, and can provide one - stop purchasing services.
Q: Can I visit the factory?
A: Yes, you are warmly welcome.
Q: What is the Minimum Order Quantity (MOQ)?
A: The MOQ for standard products is 1 FCL (Full Container Load), and we can provide 500g samples for free. For customized products, it will be adjusted according to the formula. Please consult our sales representatives for details.
Q: Can you provide customized packaging?
A: We support various customized packaging, such as ton bags, moisture - proof vacuum packaging, labeled packaging, etc. Additional packaging fees will be calculated according to the actual cost.
Q: What are the payment methods?
A: We accept T/T (50% advance payment + the balance according to the contract agreement), L/C (only from well - known banks, sight and irrevocable), and Alibaba Credit Insurance Orders.
Q: How long is the production cycle of an order?
A: After the advance payment is received, it will take about 3 - 20 days depending on the order quantity.
Q: What are the transportation methods?
A: We support sea freight, air freight, and international express delivery. Real - time logistics tracking will be provided.
Q: Can I appoint a freight forwarder company?
A: We support customers in appointing freight forwarders, but they need to have the qualification for chemical transportation. It is recommended to use our professional cooperative freight forwarders.
