talc-powder. Hoá chất - hoachatphubinh.com
Talc or talcum is a clay mineral composed of hydrated magnesium silicate with the chemical formula H2Mg3(SiO3)4 or Mg3Si4O10(OH)2. In loose form, it is (in ratio with or without corn starch), one of the most widely used substances known as baby powder.
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