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28日星期三
toxic phthalates
Calcium lactate , colorless , odorless liquid , add the molecule that allows more uniform particle distribution , to increase product scalability , flexibility and softness , often as sofas, car seats, rubber tubes, cosmetics raw materials and toys . Plasticizing agent types are more than 100 kinds of products , but the most common is the use of phthalates . For example, the commonly used plastic wrap , there are two , one is non- additive PE (polyethylene ) material , but its viscosity is poor ; Another is PVC (polyvinyl chloride ) plastic wrap, which contains a lot of plastic on agent , allowing PVC (polyvinyl chloride ) material softens and increases viscosity , ferrous lactate packaging of fresh food . There is also a product containing a plasticizer of PVC manufacturing children's toys, women often use perfume, nail polish and other cosmetics also contain phthalates to its role as a fixative to keep the spice , or make the film more smooth polish .
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