Ignition, oxidation leading

Pytlewski, L. L Rep. AD-A028841, 13, Richmond (Va.), USNTIS, 1976 Contact of gaseous ammonia with the /V-chlorourea. either alone, or mixed with zinc oxide, leads to ignition. The same could happen in contact with cone, aqueous ammonia, solid ammonium carbonate or organic amines. 

Hydrogen sulfide is rapidly oxidised, and may ignite in contact with a range of metal oxides, including barium peroxide, chromium trioxide, copper oxide, lead dioxide, manganese dioxide, nickel oxide, silver(I) oxide, silver(II) oxide, sodium peroxide, and thallium(III) oxide. In the presence of air, contact with mixtures of calcium oxide or barium oxide with mercury oxide or nickel oxide may cause vivid incandescence or explosion. 

Contact with copper oxide, lead(II) oxide, lead(IV) oxide, mercury(II) oxide, tin(IV) oxide or iron(II,III) oxide causes violent decomposition and ignition. Dry powdered silver oxide causes an explosion. 

DOT CLASSIFICATION 4.3 Label Danger When Wet, Corrosive, Flammable Liquid SAFETY PROFILE Moderately toxic by inhaladon. Corrosive. A severe irritant to skin, eyes, and mucous membranes. Ignites spontaneously in ait. A very dangerous fire hazard when exposed to heat or flame. Forms impact-sensitive explosive mixtures with potassium permanganate, lead(II) oxide, lead(TV) oxide, copper oxide, silver oxide. To fight fire, use water, foam, CO2, mist. When heated to decomposition it emits toxic fumes of CL. See also CHLOROSILANE. 

Ignition on contact with furfuryl alcohol powdered metals (e.g., magnesium iron) wood. Violent reaction with aluminum isopropoxide -f- heavy metal salts charcoal coal dimethylphenylphosphine hydrogen selenide lithium tetrahydroaluminate metals (e.g., potassium, sodium, lithium) metal oxides (e.g., cobalt oxide, iron oxide, lead oxide, lead hydroxide, manganese oxide, mercur oxide, nickel oxide) metal salts (e.g., calcium permanganate) methanol + phosphoric acid 4-methyl-2,4,6-triazatricyclo [5.2.2.0 ] undeca-8-ene-3,5-dione + potassium hydroxide a-phenylselenoketones phosphorus phosphorus (V) oxide tin(II) chloride unsaturated organic compounds. 

SAFETY PROFILE Poison by skin contact and subcutaneous routes. Human systemic effects by skin contact with very small amounts primary irritant, corrosive. Explodes on contact with potassium, white phosphorus. Ignites on contact with antimony. Vigorous reaction with metal oxides (e.g., silver oxide, lead(II) oxide, lead(IV) oxide, lead(II)(IV) oxide). When heated to decomposition it emits very toxic fumes of Cl" and Se. See also SELENIUM COMPOUNDS and CHLORIDES. 

Sault and Masel (1982) measured horatian oscillations in temperature for the oxidation of hydrogen in nickel foil. The effect of surface pretreatment on ignition instabilities leading to self-sustained oscillations were examined. 

ARAGONITE (1317-65-3) CaCO, Noncombustible solid. Incompatible with acids (exothermic reaction with extensive foaming and release of gas is caused when acid is highly concentrated) acid salts alum, ammonium salts fluorine (ignition), germanium, lead diacetate, magnesium, mercurous chloride, silicon, silver nitrate, titanium. Thermal decomposition above 1517°F/825°C releases calcium oxide (quicklime) and COj. 

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