1, 3-dioxopentylene

1, 3-dioxopentane is colorless and transparent liquid at room temperature and pressure, soluble in water, ethanol, ether, acetone. Its vapor and air can form an explosive mixture, which can cause combustion and explosion in case of open fire and high heat energy. The compound has no danger of polymerization, but is intolerant to oxidants and acids. Colorless transparent liquid. The freezing point is -95℃, the boiling point is 78℃ (100 kpa), the relative density is 1.066 (15/4℃), the refractive index is 1.3974, and the flash point is 1℃. It is miscible with water, soluble in alcohol, ether and benzene. An azeotrope formed with water, with a boiling point of 70-73 ° C and a water content of 6.7%. It can decolorize bromine water. The product is the second monomer of copolyformaldehyde, which is copolymerized with triformaldehyde in a ratio of 95:5 to produce copolyformaldehyde. The product is also used as a solvent, and is also a silk finishing agent and sealing adhesive. It is mainly used as solvent and extractant of oil and fat, electrolytic solvent of lithium battery, chlorine-based solvent stabilizer, drug intermediate and so on

1, 3-dioxopentane is an excellent organic solvent, mainly used as solvent and extractant of oil and fat, electrolytic solvent of lithium battery, and chlorine-based solvent stabilizer.

Used as a solvent for low boiling point compounds and as an extractant for oils, waxes, dyes and fiber derivatives It is obtained by the reaction of polyformaldehyde with ethylene glycol. Polyformaldehyde and ethylene glycol were put into the reactor at 1:1.25 molar ratio, and the reaction was carried out at 90-110℃ under atmospheric pressure with strong acid ion exchange resin as catalyst. The azeotrope at 70-74℃ is distilled from the top of the distillation column, and then distilled and purified after salting out with sodium chloride and dewatering with anhydrous calcium chloride. The 71-74℃ fraction is cut and the water is removed to 200ppm with molecular sieve to obtain the finished product. Another operation is to make polyformaldehyde and ethylene glycol in the presence of concentrated sulfuric acid reaction, salt out by sodium chloride, solid alkali drying, distillation to obtain the product. Raw material consumption quota: polyformaldehyde (93-95%) 750kg/t, ethylene glycol 200kg/t. Flammable liquid Poisoned Oral - rat LD50: 3000 mg/kg; Oral - mouse LD50: 3200 mg/kg Skin - Rabbit 530 mg mild; Eyes - Rabbit 750 micrograms Flammable in case of open fire, high temperature, oxidizer; Burning produces irritating smoke Warehouse ventilation and low temperature drying; Store separately from oxidants and acids Dry powder, dry sand, carbon dioxide, foam, 1211 extinguishing agent TWA 10 mg/m3; STEL 50 mg/m3