different between trimethylolpropane vs trimethylolethane

English

trimethylol +? propane

trimethylolpropane (uncountable)

(organic chemistry) An organic compound with chemical formula CH₃CH₂C(CH₂OH)₃, a colourless solid triol widely used as a building block in the polymer industry.

trimethylolethane (uncountable)

(organic chemistry) An organic compound with the chemical formula CH₃C(CH₂OH)₃, a triol whose esters are known for their resistance to heat, light, hydrolysis, and oxidation.

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