Hydrofluoric acid, incompatibilities with

ACID AMMONIUM FLUORIDE (1341-49-7) Reacts with water, forming a weak solution of hydrofluoric acid. Incompatible with alkalis, acids. Attacks glass, cement, and most metals in the presence of moisture. Flammable hydrogen gas may collect in enclosed spaces. 

Toxicology LD50 (oral, rat) 175 mg/kg toxic by inh., ing., skin contact irritating to eyes, skin, respiratory system exposure can cause stomach pains, vomiting, diarrhea may cause tremors, cyanosis, Gl effects target organs heart, kidneys, nerves, Gl system TSCA listed Precaution Reacts violently with water contact with acids, heat, or moisture may liberate highly toxic, corrosive hydrofluoric acid incompat. with acids... 

Since the corrosion resistance of the high-silicon alloys depends upon the permanence and impermeability of a thin silica film on the surface of the metal, it is obvious that any reagent which can damage the film will cause accelerated corrosion of the metal. For this reason all solutions containing hydrofluoric acid must be regarded as incompatible with the alloys. 

SAFETY PROFILE A poison. Moderately toxic by inhalation. A powerful irritant. Hydrolyzes instantly to form HF on contact with moisture. See dso CARBONYLS, HYDROFLUORIC ACID, and FLUORINE. Incompatible with hexafluoroisopropylideneamino-lithium. When heated to decomposition it emits toxic fumes of CO and F", See CARBON MONOXIDE for fire and explosion hazard. 

DOT CLASSIFICATION 6.1 Label KEEP AWAY FROM FOOD SAFETY PROFILE A poison by ingestion and subcutaneous routes. Ingestion can cause vomiting and diarrhea. A strong irritant. Incompatible with hydrofluoric acid. When heated to decomposition it emits toxic fumes of Sip4, KsSiFv, and KF. 

Incompatible with oxidizing agents, iodides, and albumin. Reacts violently with hydrofluoric acid and nitric acid. 

DIFLUOROPHOSPHORIC ACID (13779-41-4) Reacts with moisture in air, forming hydrogen fluoride. Reacts with water, steam, forming hydrofluoric acid. Aqueous solution incompatible with sulfuric acid, alkalis, ammonia, aliphatic amines, alkanolamines, alkylene oxides, amides, epichlorohydrin, organic anhydrides, isocyanates, vinyl acetate. Attacks glass and other siliceous materials. Attacks metals in the presence of moisture. 

HEXAFLUORURE de SOUFRE (French) (2551-62-4) Hydrolyzes in hot water, forming hydrofluoric acid. Violent reaction with chromyl chloride, diethylzinc, dimethyl sulfoxide, disilane, lead dioxide, nitric acid, red phosphoms, potassium, sodium peroxide. Incompatible withhexafluoroisopropylideneaminolithium. 

PHOSPHORIC ANHYDRIDE (1314-56-3) Reacts with water, water mist, steam, alcohols. forming heat and phosphoric acid. Reacts violently with bromine pentafluoride, caustics, formic acid, hydrofluoric acid, hydrogen peroxide, iodides, metallic powders, methyl hydroperoxide, perchloric acid, potassium, strong oxidizers, propargyl alcohol, sodium, sodium carbonate, sodium hydroxide. Incompatible with ammonia, calcium oxide. Attacks metals, forming flammable hydrogen, in the presence of moisture. 

Incompatibilities and Reactivities Water, nitric acid, oxidizers, organic compounds [Note Reacts violently with all combustible materials, except the metal containers in which it is shipped. Reacts with H2O to form hydrofluoric acid.] ... 

Incompatibilities and Reactivities Combustible materials, chlorine, bromine, iodine, platinum, metal oxides, moist air, hydrogen sulfide, hydrocarbons, water [Note Reacts very slowly with water to form hydrofluoric acid.]... 

A building was evacuated due to fumes generated by mixing a solution of nitric acid, hydrogen fluoride, and acetic acid with a solution of ethanol, hydrofluoric acid, and water. Investigators determined that the fumes resulted from a reaction between incompatible materials being mixed for waste disposal by a technician. (ORPS Report SAN—LLNL-LLNL-1997-0037)... 

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