Water-reactive solid

Substances which in contact with water emit flammable gases Water-reactive liquid, n.o.s., 4.3, 6.1, 8 Water-reactive solid, n.o.s., 4.1,4.2,4.3, 5.1, 6.1, 8 

Water (7732-18-5) is a simple molecule of two hydrogens attached to an oxygen atom, H-O-H. However, the few types of reaction it undergoes are universally fundamental to all forms of life. 

Certain compounds contain crystalline water as part of their structure and form hydrates. This water can be driven off by heating. One of the hydrates of sodium sulphate (Na2S04), for example, is its decahydrate, Na2S04 lOHOH. 

In hydrolysis, the H-OH bond in the water molecule splits and the reactions take place in the presence of the H and OH ions. For example, calcium carbide in water reacts to produce acetylene and calcium hydroxide in solution  

The excess of OH ions makes the solution alkaline. Or, in the case of many metals (M), hydrogen gas is given off leaving a hydroxide solution  

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Chemical reaction sources catalysis, reaction with powerful oxidants, reaction of metals with halocarhons, thermite reaction, thermally unstahle materials, accumulation of unstahle materials, pyrophoric materials, polymerization, decomposition, heat of adsorption, water reactive solids, incompatihle materials. 

Water-Reactive Solid, flammable. 3132 40 Zinc Phosphide 1714 41... 

Water-Reactive Solid, oxidizing. 3133 40 Zinc Powder, wetted with not less 1358 32... 

Water-Reactive Solid, poisonous. 3134 40 Zinc Powder or Dust 1436 76... 

Water-Reactive Solid, self-heating. 3135 40 Zirconium, dry, wire, sheet, or 2009 37... 

Bernal, S., Botana, F.J., Garcia, R., and Rodn guez-Izquierdo, J.M. Behavior of rare-earth sesquioxides exposed to atmospheric carbon-dioxide and water. Reactivity Solids 1987, 4, 23 10. 

Note 2 Warning—The gray ampules contain metallic sodium which is a flammable, water-reactive solid. Reaction with water will generate flammable hydrogen gas. 

Chemical Reactivity - Reactivity with Water Solid has very slow reaction no hazard. Liquid spatters when in contact with water Reactivity with Common Materials No reaction Stability During Transport Stable Neutralizing Agents for Acids and Caustics Water and sodium bicarbonate Polymerization Not pertinent Inhibitor of Polymerization Not pertinent. 

STABREX is easier and simpler to use compared to any other oxidant available for industrial water treatment. The product is pumped directly from returnable transporters (PortaFeed Systems)17 with standard chemical feed equipment. Previously, the only practical ways to apply bromine were to oxidize bromide solutions on-site with chlorine in dual liquid feed systems, or with one of the solid organically-stabilized bromine products applied from sidestream erosion feeders. The former is cumbersome and complex, and the latter is prone to dusting and difficult to control. Other oxidants require complex handling and feed of toxic volatile gases, unstable liquids, multiple-component products, or reactive solids. Simplicity in use results in reduced risk to workers and to the environment. 

A powerfully reducing and reactive solid (m.p., 15°C) of high vapour pressure (b.p., 50°C). Mixtures with air may explode, and contact with water causes violent polymerisation [1], More usually encountered polymeric or as a hydrate. Like formaldehyde, pure glyoxal may polymerise exothermally and ignite in storage [2],... 

NFPA 325, Fire Hazard Properties of Flammable Liquids, Gases, and Volatile Solids, gives NFPA Instability Ratings and indications of water reactivity for flammable liquids, flammable gases, and volatile flammable solids. 

On April 21, 1995, an explosion and fire at Napp Technologies in Lodi, New Jersey, killed five employees and destroyed the facility (Figure l).19 The plant was conducting a toll blending operation to produce a commercial gold precipitation agent. The chemicals involved were water reactive (i.e., aluminum powder, a combustible metal in the form of finely divided particles and sodium hydrosulfite, a combustible solid). 

In the strict chemical sense, the term drying refers to removal of water present in solid or fluid materials by treatment with water-reactive chemicals. In a wider (chemical engineering) context, it also refers to use of physical methods to remove any unwanted liquids (or vapours) from solid, liquid or gaseous phases. 

Tricalcium Phosphate. CarlPOjij. white solid, insoluble in water, reactive with silicon oxide and carbon ai eleciric furnace temperaiure yielding phosphorus vapor reactive with H1SO4 to form, according tn the proportions used, phosphoric acid, or dicalcium hydrogen phosphate, CaHPOa, white solid, insoluble or calcium dihydrogen phosphate, Cal 1L POrb- H O. white solid, soluble. pK,p = 28.70. See also Apatite. 

J.R. Gibson J.D. Weber, Handbook of Selected Properties of Air- and Water-Reactive Materials , NAVAMMODEP RDTR 144 (1969), 21-22 25) L. Greiner, Solid Fuel and... 

Both sodium and potassium form carbonyl compounds, NaCO and KCO, respectively. Both compounds are highly reactive solids prone to explode when exposed to water or air. Decomposition of the carbonyls gives off caustic oxides and hydroxides of Na and K, as well as toxic carbon monoxide. 

The term reactive filtration may be used in a variety of applications. A simple search of the internet provides results such as reactive filter paper [1], adsorption filters for removing heavy metals from water [2], solid matrices used in organic synthesis [3], membranes for wastewater treatment, or even dialysis machines, filters for deep-frying pans and devices for the dechlorination of shower water by reaction with vitamin C. Most of the applications termed reactive filtration would be named heterogeneous catalysis or adsorption from a chemical engineer s point of view. 

B. Fubini, V. Bolis, M. Bailes, and F.S. Stone, The reactivity of oxides with water vapor, Solid State Ionics, 32-33, 258-272 (1989). 

Particularly sophisticated models deal with reactive mass transport, including both the accurate description of the convective and dispersive transport of species, as well as the modeling of interactions of species in water, with solid and gaseous phases (precipitation, dissolution, ion exchange, sorption). 

Flammable solid, water reactive Poison, P-listed, extremely hazardous... 

Carbon suboxide, C3O2, 0=C=C=C=0 , also called l,2-propadiene-l,3-dione, is an evil-smelling unstable gas, bp +6.8 °C, which is obtained by the dehydration of malonic acid with P4O10 in vacuum at 140-150 °C (equation 6). Carbon suboxide polymerizes readily at room temperature to a yellow solid, and above 100 °C to a ruby-red water-soluble solid. Photolysis of C3O2 gives C2O ( C=C=0 ) as a reactive intermediate, which reacts with alkenes by carbon atom insertion (equation 7). 

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