2,5-Dimethoxybenzaldehyde

2,5-Dimethoxybenzaldehyde is an organic compound and a benzaldehyde derivative. One of its uses is the production of 2,5-dimethoxyphenethylamine also known as 2C-H. 2C-H is used to produce many other psychoactive drugs, such as 2C-B, 2C-I and 2C-C.

It is often synthesized from 2-methyl-4-methoxyphenol by clandestine chemists.