A colorless, gaseous compound, HCHO, the simplest aldehyde, used for manufacturing melamine and phenolic resins, fertilizers, dyes, and embalming fluids and in aqueous solution as a preservative and disinfectant.

• 甲醛一种无色的气体化合物，分子式为HCHO，是最简单的醛，用于制三聚氰胺和苯酚树脂、化肥、染料、防腐液剂和甲醛澄清水溶液中的防腐剂和杀虫剂等