Do you really understand the dangers of formaldehyde to people?
Baidu encyclopaedia says: formaldehyde is a colourless gas with a strong irritating odour. It is soluble in water, alcohol and ether. Formaldehyde is gaseous at room temperature, usually in the form of an aqueous solution. 35 to 40% of the aqueous solution of formaldehyde is called formalin.
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