Simple examples of aldehydes are methanal ( formalaehyde , HCHO ) and ethanal ( acetaldehyde , CH 3 CHO ).

简单的醛有甲醛(HCHO ) 和乙醛 ( CH3CHO ).

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The factors that effected the water reducibility and stability of the sulfonated melamine - HCHO resins are discussed.

详细讨论了影响磺化三聚氰胺甲醛树脂减水率和稳定性的各个因素.

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Their combination with tanning agents Cr, Al, HCHO and vegetable tannin extract was also studied.

同时研究了它们与铬 、 铝 、 甲醛和栲胶等鞣剂的结合稳定性及其产生的助鞣作用.

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