2,4-Dichlorophenol


2,4-Dichlorophenol is a chlorinated derivative of phenol with the molecular formula Cl2C6H3OH. It is a white solid that is mildly acidic. It is produced on a large scale as a precursor to the herbicide 2,4-dichlorophenoxyacetic acid.

Production and use

2,4-DCP is produced by chlorination of phenol.
Annual worldwide production is estimated at 88 million pounds. It is also a photo-degradation product of the common antibacterial and antifungal agent triclosan along with the dioxin 2,8-dichlorodibenzo-p-dioxin.

Safety

The LD50 is 580 mg/kg. Liquid 2,4-DCP is readily absorbed through the skin. Solid 2,4-DCP does not readily absorb through skin and has a lower NFPA H=3 rating. This is primarily caused by instantaneous kidney failure, liver failure, and failure of various other organs.