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Formaldehyde
Ammonium hydroxide
Hexamethylenetetramine
Formaldehyde
It is a colorless gas with a pungent odor, which is irritating to the eyes, nose, etc.
ammonium hydroxide
Ammonia solution is colorless, transparent and has a pungent odor.
Hexamethylenetetramine
Flammable solid: May cause skin allergy reaction: May cause slight skin corrosion.
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