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Sodium Hypophosphite H2NaO2P CAS 7681-53-0 - China Suppliers & Factory for High-Quality Chemicals
Sodium hypophosphite is a colorless monoclinic crystal or a pearl-like lustrous crystal or white crystalline powder. It is hygroscopic, odorless and salty in taste. It is soluble in water, ethanol, glycerol, slightly soluble in ammonia and ammonia water, and insoluble in ether. The aqueous solution is alkaline.
In the dry state, it is relatively stable. When heated to above 200°C, it rapidly decomposes and releases phosphine hydrogen gas, which is highly toxic and self-igniting. It is a strong reducing agent and can reduce metals such as gold, silver, mercury, nickel, chromium, and cobalt from salts to their metallic states. It will explode when exposed to strong heat or mixed with oxidants such as potassium chlorate. At normal pressure, heating and evaporation of the sodium hypophosphite solution will also cause an explosion. Therefore, evaporation should be carried out under reduced pressure.
In the United States, sodium hypophosphite, hypophosphorous acid and several other types of hypophosphates are classified as first-class controlled precursor chemicals and are subject to regulation.