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Insurance powder
Classification:
Product Description
Specification parameters
| 中文名 | 连二亚硫酸钠 |
|---|---|
| 外文名 | Sodium Hydrosulfite |
| 别 名 | 保险粉、低亚硫酸钠 |
| 化学式 | Na2S2O4 |
| 分子量 | 174.108 |
| CAS登录号 | 7775-14-6 |
| EINECS登录号 | 231-890-0 |
| 熔 点 | 300 ℃ |
Essential information
Sodium hydrosulfite, also known as sodium hydrosulfite, is a white sandy crystalline or pale yellow powder chemical product with a melting point of 300 ℃ (decomposition) and an ignition temperature of 250 ℃. It is insoluble in ethanol and soluble in sodium hydroxide solution. It reacts strongly with water and burns.
Application area
Insurance powder is widely used in the textile industry for reducing dyeing, reducing cleaning, printing, and decolorization, as well as for bleaching fabrics such as silk, wool, nylon, etc. Due to its absence of heavy metals, bleached fabrics have bright colors and are not easily faded. In terms of various substances, insurance powder can also be used for food bleaching, such as gelatin, sucrose, honey, soap, animal (vegetable) oil, bamboo ware, porcelain clay bleaching, etc. Insurance powder can also be used in organic synthesis, such as as as a reducing agent or bleaching agent in the production of dyes and drugs. It is a suitable bleaching agent for wood pulp papermaking. Moreover, it can reduce many heavy metal ions such as Pb2+, Bi3+, etc. to metals in water treatment and pollution control, and can also be used for preserving food and fruits. However, due to the various hazards associated with insurance powder, many of its uses tend to be replaced by safer, easier to store and transport sulfur dioxide urea.
Packaging, Storage, Transportation, and Safety
Storage precautions:
Store in a cool and ventilated warehouse. Maintain relative humidity below 75%. The packaging requires sealing and must not come into contact with air. It should be stored separately from oxidants, acids, and flammable materials, and avoid mixing storage. Adopt explosion-proof lighting and ventilation facilities. Prohibit the use of mechanical equipment and tools that are prone to generating sparks. The storage area should be equipped with suitable materials to contain leaked materials
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