2,4-Toluene Diisocyanate

CAS RN:584-84-9

Disposal Methods

Generators of waste (equal to or greater than 100 kg/mo) containing this contaminant, EPA hazardous waste number U223, must conform with USEPA regulations in storage, transportation, treatment and disposal of waste.
Concentrated wastes from distillation equipment are preferably burnt in special waste incinerators. This also holds for complex and concentrated wastes, which cannot be regenerated by distillation. Because of the high reactivity of TDI /toluene diisocyanate/ waste waters contain only reaction products from the reaction with water. These can be biodegraded by treatment with activated sludge. Recommendable methods: Incineration, alkaline hydrolysis, discharge to sewer. Not recommendable: Landfill. Peer-review: Avoid contact or inhalation, add TDI to excess dilute alkali, and discharge to sewer. TDI can react explosively with moisture. (Peer-review conclusions of an IRPTC expert consultation (May 1985))
A potential candidate for rotary kiln incineration at a temperature range of 820 to 1,600 deg C and residence times of seconds for liquids and gases, and hours for solids. A potential candidate for liquid injection incineration at a temperature range of 650 to 1,600 deg C and a residence time of 0.1 to 2 seconds. A potential candidate for fluidized bed incineration at a temperature range of 450 to 980 deg C and residence times of seconds for liquids and gases, and longer for solids.
This compound should be susceptible to removal from waste water by air stripping.
SRP: Wastewater from contaminant suppression, cleaning of protective clothing/equipment, or contaminated sites should be contained and evaluated for subject chemical or decomposition product concentrations. Concentrations shall be lower than applicable environmental discharge or disposal criteria. Alternatively, pretreatment and/or discharge to a permitted wastewater treatment facility is acceptable only after review by the governing authority and assurance that "pass through" violations will not occur. Due consideration shall be given to remediation worker exposure (inhalation, dermal and ingestion) as well as fate during treatment, transfer and disposal. If it is not practicable to manage the chemical in this fashion, it must be evaluated in accordance with EPA 40 CFR Part 261, specifically Subpart B, in order to determine the appropriate local, state and federal requirements for disposal.
Find more information on this substance at: Hazardous Substances Data Bank , TOXNET , PubMed