25167-82-2

Trichlorophenols exists as 6 isomers (2,4,5-; 3,4,5-; 2,4,6-; 2,3,4-; 2,3,5-and 2,3,6-). The most important (heavily regulated) are the 2,4,5-and 2,4,6-isomers. The 2,4,5-isomer is white powder or needles; 2,3,5-and 2,3,6- are colorless crystals; 2,4,5-is a gray crystalline solid or flakes; 2,4,6-is a colorless to light yellow crystalline solid. They have a phenolic odor.

2,4,5-TCP is used as antifungal agent in adhesives and as preservative in polyvinylacetate emulsions. 2,4,6-T is used in manufacturing slime-control agents and as an effective germicide and preservative; to produce defoliant 2,4,5-T and related products. Also used directly as a fungicide, anti-mildew and preservative agent; algicide, bactericide. 2,4,6-TCP is used to produce 2,3,4,6-TCP and PCP. Used directly as germicide, bactericide, glue and wood preservative; and anti-mildew treatment. 2,3,6-TCP is used as intermediate in production of fungicides and plant growth regulators

Skin Contact: Flood all areas of body that have contacted the substance with water. Don’t wait to remove contaminated clothing; do it under the water stream. Use soap to help assure removal. Isolate contaminated clothing when removed to prevent contact by others. Eye Contact: Remove any contact lenses at once. Immediately flush eyes well with copious quantities of water or normal saline for at least 20-30 minutes. Seek medical attention.
Inhalation: Leave contaminated area immediately; breathe fresh air. Proper respiratory protection must be supplied to any rescuers. If coughing, difficult breathing or any other symptoms develop, seek medical attention at once, even if symptoms develop many hours after exposure.
Ingestion: If unconscious or convulsing, do not induce vomiting or give anything by mouth. Assure that victim’s airway is open and lay him on his side with his head lower than his body and transport at once to a medical facility. If conscious and not convulsing, give a slurry of activated charcoal in water. If medical advice is not readily available, do not induce vomiting, and rush the victim to the nearest medical facility.

UN2020 Chlorophenols, solid, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.

Perhaps the most notable incompatibility is the reaction of 2,4,5-trichlorophenol in alkaline medium at high temperatures to produce dioxin. (2,3,4-isomer) reacts with oxidizers, acid anhydrides; and acid chlorides. (2,3,5-isomer) Decomposes on heating, on burning and on contact with strong oxidants producing toxic and corrosive fumes of hydrogen chloride. The substance is a weak acid. (2,3,6-isomer); the substance is a weak acid. pH=4.8/4.2-; (2,4,6-isomer); reacts violently with strong oxidants and is incompatible with acid chlorides and acid anhydrides.

Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform with EPA regulations governing storage, transportation, treatment, and waste disposal. Incineration, preferably after mixing with another combustible fuel. Care must be exercised to assure complete combustion to prevent the formation of phosgene. An acid scrubber is necessary to remove the halo acids produced.