КРЕОЗОТ

Химические свойства

Creosote is an oily liquid with a burning taste,obtained by distilling coal and woodtar, used as an antiseptic and wood preservative. Creosote oil is a yellow-to-green oily liquid that boils between 240 and 270 °C, is immiscible with water and soluble in alcohol,and is derived by the fractional distillation of coal tar, used as a wood preservative, fungicide and disinfectant. Also, coal-tar creosote.

Использование

Wood preservative, disinfectant, insecticide.

Общее описание

CREOSOTE contains creosote, an EPA designated hazardous substance. CREOSOTE often contains substantial amounts of naphthalene and anthracene. The primary hazard is the threat posed to the environment. Immediate steps should be taken to limit its spread to the environment. Since CREOSOTE is a liquid CREOSOTE can easily penetrate the soil and contaminate groundwater and nearby streams.

Реакции воздуха и воды

CREOSOTE may be air sensitive. Insoluble in water.

Профиль реактивности

Phenols, such as CREOSOTE, do not behave as organic alcohols, as one might guess from the presence of a hydroxyl (-OH) group in their structure. Instead, they react as weak organic acids. Phenols and cresols are much weaker as acids than common carboxylic acids (phenol has Ka = 1.3 x 10^[-10]). These materials are incompatible with strong reducing substances such as hydrides, nitrides, alkali metals, and sulfides. Flammable gas (H2) is often generated, and the heat of the reaction may ignite the gas. Heat is also generated by the acid-base reaction between phenols and bases. Such heating may initiate polymerization of the organic compound. Phenols are sulfonated very readily (for example, by concentrated sulfuric acid at room temperature). The reactions generate heat. Phenols are also nitrated very rapidly, even by dilute nitric acid. CREOSOTE is incompatible with strong oxidizers.

Опасность

Toxic by inhalation of fumes, skin, and eye irritant. Use may be restricted. Probable carcinogen.

Угроза здоровью

Vapors cause moderate irritation of nose and throat. Liquid causes severe burns of eyes and reddening and itching of skin. Prolonged contact with skin can cause burns. Ingestion causes salivation, vomiting, respiratory difficulties, thready pulse, vertigo, headache, loss of pupillary reflexes, hypothermia, cyanosis, mild convulsions.

Пожароопасность

Behavior in Fire: Heavy, irritating black smoke is formed.

Химическая реактивность

Reactivity with Water No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

Возможный контакт

The coke-oven plant is the principal source of coal tar. The hot gases and vapors produced during the conversion of coal to coke are collected by means of a scrubber, which condenses the effluent into ammonia, water, crude tar, and other by-products. Crude tar is separated from the remainder of the condensate for refining and may undergo further processing. Employees may be exposed to pitch and creosote in metal and foundry operations; when installing electrical equipment; in construction, railway, utility; and briquette manufacturing.

Перевозки

UN1136 Coal tar distillates, flammable, Hazard Class: 3; Labels: 3-Flammable liquid

Несовместимости

Incompatible with strong oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Phenols, such as creosote react as weak organic acids. Phenols and cresols are much weaker as acids than common carboxylic acids (phenol has pKa = 9.88). These materials are incompatible with strong reducing agents such as hydrides, nitrides, alkali metals, and sulfides. Flammable hydrogen gas is often generated, and the heat of the reaction may ignite the gas. Heat is also generated by the acid-base reaction between phenols and bases. Such heating may initiate polymerization of the organic compound. Phenols are sulfonated very readily (e.g., by concentrated sulfuric acid at room temperature). The reactions generate heat. Phenols are also nitrated very rapidly, even by dilute nitric acid

Утилизация отходов

Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.