Flammable solids spontaneous ignition

CHEMICAL PROPERTIES flammable solid volatile ignites at about 30 C in moist air forms tri- or pentahalides on direct combination with the halogens combines with sulfur to form sulfides reacts with several metals to form phosphides treatment with nitric acid yields orthophosphoric acid reaction with alkali hydroxides leads to the formation of phosphine and sodium hypophosphite FP (spontaneously flammable in air) LFLAJFL (NA) AT (30 C, 86°F). 

Flammability and Explosibility Potassium hydride and sodium hydride are flammable solids that ignite on contact with moist air. Potassium hydride presents a more serious fire hazard than sodium hydride. The mineral oil dispersions do not ignite spontaneously on exposure to the atmosphere. Sodium hydride and potassium hydride fires must be extinguished with a class D dry chemical extinguisher or by the use of sand, ground limestone, dry clay or graphite, or "Met-L-X " type sohds. Water or CO2 extinguishers must never be used on sodium and potassium hydride fires. 

A process is described [224] in which an exothermic reaction takes place in a semi-batch reactor at elevated temperatures and under pressure. The solid and liquid raw materials are both toxic and flammable. Spontaneous ignition is possible when the reaction mass is exposed to air. Therefore, the system must be totally enclosed and confined in order to contain safely any emissions arising from the loss of reactor control, and to prevent secondary combustion reactions upon discharge of the materials to the atmosphere. Further, procedures and equipment are necessary for the safe collection and disposal of solid, liquid, and gaseous emission products. 

Flammable solid, ignites spontaneously in air. Reaction with water is violent with the evolution of hydrogen. 

Inflammability or Flammability (latter is preferred in modern usage). The ease with which a material (gas, liquid or solid) will ignite, either spontaneously (pyrophoric), from exposure to a high-temperature environment (autoignition), or to a spark or open flame. It also involves the rate of spreading of a flame once it has started. The more readily ignition occurs, the more flammable the material less easily ignited materials are said to be combustible, but the line of demarcation is often indefinite, and depends on the state of subdivision of the material as well as on its chemical nature... 

DOT CLASSIFICATION 4.2 Label Spontaneously Combustible SAFETY PROFILE Flammable solid when exposed to heat or flame. May spontaneously heat and ignite if stored wet and hot. 

DOT CLASSIFICATION 4.3 Label Dangerous When Wet (UN 2950) DOT Class 4.1 Label Flammable Solid (UN 1869) DOT Class 4.3 Label Danger When Wet, Spontaneously Combustible SAFETY PROFILE Inhalation of dust and fumes can cause metal fume fever. The powdered metal ignites readily on the skin causing burns. Particles embedded in the skin can produce gaseous blebs that heal slowly. 

DOT CLASSIFICATION 4.2 Label Spontaneously Combustible (UN 1382) DOT Class 8 Label Corrosive (UN 1847) SAFETY PROFILE Poison by ingestion and inhalation. Emits H2S in contact with acids steam. A flammable solid. Unstable may explode on percussion or rapid heating. Ignites on contact with nitrogen oxide. Reacts with H2O to form KOH and KSH. When heated to decomposition it emits very... 

ALUMINUM LITHIUM HYDRIDE (16853-85-3) LiAlH Highly flammable solid (Fire Rating 2). A powerful reducing agent. Ignites spontaneously in moist air and/or in heated air above 257°F/125°C... 

BARIUM SULFIDE (21109-95-5) BaS Flammable solid. Oxidizes in dry air. Contact with acid, acid fumes, moisture, steam, or moist air causes decomposition with the formation of toxic and flammable hydrogen sulfide gas. Evolved gas can form explosive mixtures with air and may cause spontaneous ignition or explosion. Violent reaction with strong oxidizers, calcium chlorate calcium nitrate chlorine dioxide phosphorus(V) oxide strontium chlorate strontium nitrate. Incompatible with lead dioxide, potassium chlorate, potassium nitrite may explode at elevated temperatures. On small fires, use smothering quantities of dry chemical powder, dry clay, dry groimd limestone (CaCOj), dry soda ash,dry sand or approved Class D extinguishers, do not use water, foam, or hydrous agents. 

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