Pure lactic acid is a colorless liquid, is a colorless to pale yellow liquid. Odorless, hygroscopic. The relative density of 1.2060 (25/4 ℃). Melting point 18 ℃. Boiling point 122 ℃ (2kPa). Refractive index nD (20 ℃) ??1.4392. With water, ethanol, glycerin, insoluble in chloroform, carbon disulfide and petroleum ether. Heating under normal pressure, concentrated to 50%, part of the anhydride into milk, thus products often contain 10% -15% of the milk anhydride.
2013年8月25日星期日
generally have a bitter taste of calcium
Calcium generally bitter taste, but relative to other calcium lactate which may be perceived threshold bigger.Lactic acid is that people feel the taste of a substance a minimum concentration, the higher the threshold, which means that the harder feel bitterness. Bioavailability is high, the body's calcium absorption rate order: lactate> gluconate> carbonate> phosphate, stability: lactate smaller molecular weight, good stability under different processing conditions remained relatively stable , lactate precipitation does not occur with the other components of the reaction, does not affect product quality. Calcium obvious: lactate containing calcium ions, as is the divalent ions, lactic acid powder can be formed in a connecting bridge between the organic molecules to strengthen the interaction between the organic molecules to enhance the brittleness of pickles.
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