Introduction: Sodium dithionite, also known as sodium sulfite, is a white sandy crystal or light yellow powder chemical product. Because sulfur is in an intermediate valence state, sodium dithionite has both strong reductive properties and strong oxidizing properties. It is mainly used as a bleaching agent in the textile industry and paper industry. When it comes into contact with water, it will release a large amount of heat and toxic gases such as hydrogen dioxide and hydrogen sulfide. It is also widely used in the textile industry in reducing dyeing, reducing cleaning, bleaching and organic synthesis, wood pulp papermaking and other fields.
【Basic information】
Chinese name | Sodium dithionite | Molecular formula | Na2O4S2 |
Foreign name | Sodium hydrosulfite | Molecular weight | 174.1071 |
Chinese alias | Sodium hyposulfite; sodium hyposulfite; sodium bisulfite | EINECS registration number | 231-890-0 |
English alias | Sodium dithionite hydrate; Sodium hydrosulphite; Sodi | Melting point | 300℃ |
CAS number | 7775-14-6 | Ignition temperature | 250℃ |
【Use】
It is widely used in the printing and dyeing industry, such as dyeing aids for cotton fabrics and bleaching of silk and wool fabrics. It is also used in medicine, mineral processing, copperplate printing. Used as a bleaching agent in the paper industry. Food grade products are used as bleaching agents, preservatives, and antioxidants.
【Security Information】
Packing level: II
Hazard category: 4.2
Customs code: 2831101000
Dangerous goods transport code: UN13844.2/PG2
WGKGermany: 1
Hazard category code: R22; R31; R7
Safety instructions: S26-S28-S43-S7/8-S43E-S28A
Dangerous goods mark: Xn: Harmful
