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29日星期四
Plasticizer DEHP is an environmental hormone
Commonly used plasticizer DEHP is an environmental hormone , despite the large number of studies have shown it to people and harmful organisms , but for the body's toxic mechanism is not yet clear . Calcium lactate and regions have put DEHP as a Group 2B carcinogen ( carcinogenic or hazards exist, but the carcinogenic hazard is how it happened and is still to be studied ) and 4 of toxic chemical substances.Another is PVC (polyvinyl chloride ) plastic wrap, which contains a lot of plastic on agent , allowing PVC (polyvinyl chloride ) material softens and increases viscosity , suitable for packaging of fresh food . There is also a product containing buffered lactic acid 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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