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41-
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Propanetriol
Molecular formula : C3H8O3
MW : 92.09
CAS No. 56-23-5-81-5
nature : colorless, transparent liquid viscosity. Maturity is hygroscopicity, combustible. The temperature of 17.8 ° C (18.17 ° C, 20 ° C). The boiling point of 290 ° C (decomposition), 263.0 ° C (53.2kPa), 240.0 ° C (26.6kPa) 167.2 ° C (1.33kPa.Conclusion) 153.8 ° C (0.665kPa), 125.5 ° C ( 0.05), flash point (open cup) 177 ° C and relative density of 1.26362 (20/20 ° C), 392.8 points spontaneous ° C 1.4746 refractive index, viscosity (20 ° C) 1499mPa s, vapor pressure (100 ° C) 26Pa, surface tension (20 ° C) 63.4mN / m. Glycerol with water and ethanol compatibility, neutral aqueous solution. 1 glycerol can be dissolved in 500 ether or ethyl acetate were 11. Insoluble benzene, chloroform, carbon tetrachloride, carbon disulfide, petroleum ether, oils. From the air to absorb moisture, but also can absorb hydrogen sulfide, sulfur dioxide and hydrogen cyanide. Odorless. Outside pure glycerine at 0 ° C at low temperature, can be a melting point of 17.8 ° C in the shiny side ramps crystals, with small amounts of water prevents crystallization. Different concentrations (weight%) of the glycerol solution to the freezing point : 10%, -1.6 ° C; 30%, -9.5 ° C; 50%, 23.0 ° C; 66.7% -46.5 ° C; 80 % -20.3 ° C; 90%, -1.6 ° C In nature, glycerol mainly in the form of glycerides widespread in the body of animals and plants.
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