A colorless liquid with a pungent, irritating odor. Insoluble in water and denser than water. Contact may irritate skin, eyes and mucous membranes. May be toxic by ingestion, inhalation and skin absorption. Used to make other chemicals.
In moist air forms dense white fumes pungent, corrosive to skin, avoid inhalation [Merck 11th ed. 1989]. Hydrolysis occurs with the formation of fluoboric and boric acids. Insoluble in water and denser than water.
A very corrosive, moisture-sensitive liquid, when heated to decomposition Borate(1-), difluorobis(propanoato-O)-, hydrogen fluoride (1:2:1), (T-4)- emits toxic fumes of fluoride and oxides of boron. Reacts with incandescennce when heated with alkali metals or alkaline earth metals except magnesium.
TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Reaction with water or moist air will release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.
