Hydroxypivaldehyde is the organic compound with the formula HOCH2(CH3)2CCHO.

A colorless liquid, it is produced by condensation of formaldehyde and isobutyraldehyde:[2] The compound is a rare example of a distillable aldol (3-hydroxyaldehyde).

Upon standing, it dimerizes reversibly to the dioxane derivative.

Hydroxypivaldehyde is a precursor to vitamin B5 as is practiced commercially.

[3] Hydroxypivaldehyde is also a precursor to neopentyl glycol by hydrogenation: