density: 1.653 (dihydrate), 1.9 (of anhydrous).
melting point: 101 ~ 102 (dihydrate), 189.5 ° C
traits: colorless, transparent crystal, toxic!
solution: dissolve in water, ethanol and ether.
purposes: for metal surface cleaning and processing, extraction of rare earth elements, textile, leather processing, catalyst preparation, is an important chemical raw materials for medicine production and polymer synthesis.
preparation or sources: the main production methods useful carbohydrates, hydrocarbons or nitric acid oxidation of ethylene glycol; Heat relief Sodium hydrogen and carbon monoxide by oxidative coupling method.