Recognize that the "formaldehyde" hazards of these home decoration cannot be ignored

What is formaldehyde? A colorless, highly irritating gas. Soluble in water, alcohol and ether. Formaldehyde is gaseous at normal temperature and usually appears as an aqueous solution. Soluble in water and ethanol, 35-40% aqueous formaldehyde solution is called formalin. The aldehyde group is polycondensed and reacted in the formaldehyde molecule to obtain a phenol resin.

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General-purpose rectifiers belong to the most widely used category of rectifiers, and their classification is relative to those with special functions, such as fast, high-frequency, and so on.

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