1-乙基-3-(3-二甲基氨基丙基)碳酰二亚胺（亦称为EDC、EDAC或EDCI）是一种水溶性碳二亚胺，常制成盐酸盐之形式。其pH范围通常在4.0-6.0。EDC常在伯胺制备酰氨时作为羧基活化剂。EDC还可用于活化磷酸基团。这种碳二亚胺通常用于肽的合成；蛋白质和核酸的交联以及制备免疫偶联物。EDC常与N-羟基丁二酰亚胺（NHS）或磺化－NHS搭配使用从而增加偶联反应的效率。

有机化学中，EDC还常与DMAP搭配使用作为羧酸和醇的酯化试剂。

1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC, EDAC or EDCI) is a water-soluble carbodiimide usually obtained as the hydrochloride. It is typically employed in the 4.0-6.0 pH range. It is generally used as a carboxyl activating agent for the coupling of primary amines to yield amide bonds. Additionally, EDC can also be used to activate phosphate groups in order to form phosphomono-esters and phosphodiesters. Common uses for this carbodiimide include peptide synthesis, protein crosslinking to nucleic acids, but also in the preparation of immunoconjugates. EDC is often used in combination with N-hydroxysuccinimide (NHS) for the immobilisation of large biomolecules.