新戊二醇，分子式C₅H₁₂O₂，有机化合物，常用于化学纤维、涂料、润滑剂等的合成生产过程中。

白色无臭结晶，有吸湿性。易溶于水、低级醇类、酮、醚和芳烃等。低毒。自燃点399°C。升华温度210°C。

Neopentyl glycol (IUPAC name 2,2-dimethyl-1,3-propanediol) is an organic chemical compound. It is used in the synthesis of polyesters, paints, lubricants, and plasticizers. When used in the manufacture of polyesters, it enhances the stability of the product towards heat, light, and water. By esterification reaction with fatty or carboxylic acids, synthetic lubricating esters with reduced potential for oxidation or hydrolysis, compared to natural esters, can be produced.