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Hazard Predictions

• Corrosive: Reaction products may be corrosive
• Generates gas: Reaction liberates gaseous products and may cause pressurization
• Generates heat: Exothermic reaction at ambient temperatures (releases heat)
• Toxic: Reaction products may be toxic

CHROMIUM OXYCHLORIDE fumes in moist air. The compound hydrolyzes exothermically on contact with water to generate chromic acid, hydrochloric acid and some chlorine (The Merck Index, Rahway (NJ), Merck and Co. Inc., 11th ed. 1989). In experiments at Argonne National Laboratory, in which it was mixed with water and stirred at room conditions, about 9 percent of the theoretical yield of HCl evolved as a gas in the first 45 minutes (Brown, D. F., et al. (2005) Development of the Table of Initial Isolation and Protective Action Distances for the 2004 Emergency Response Guidebook, ANL/DIS-05-2, Argonne National Laboratory, Argonne IL).

Water vapor will combust with fluorine; an explosive reaction occurs between liquid fluorine and ice, after an intermediate induction period (T. Harper, H. W. Schmidt, "Handling and Use of Fluorine and Fluorine-Oxygen Mixtures in Rocket Systems", NASA Special Publication SP-3037: 52 (1967)).

If liquid air which has stood for some time and contains condensed water from the atmosphere is treated with fluorine, a precipitate is formed which is likely to explode. The explosive material is thought to be fluorine hydrate (Mellor, J.W. 1940. Mellor's Comprehensive Treatise on Inorganic and Theoretical Chemistry. Vol. 2, p. 11. Longmans, Green and Co Ltd.).

TRICHLORO-S-TRIAZINETRIONE may react with water releasing gaseous chlorine. If mixed with a small amount of water, the concentrated solution (with pH at about 2.0) may explode due to the evolution of unstable nitrogen trichloride (Bretherick, L. 1996. Bretherick's Handbook of Reactive Chemical Hazards. Vol. 1, p 384. Fifth Ed. Urben, P.G., Ed. Butterworth-Heinemann, Boston, MA).

NITRIC OXIDE combines very rapidly with oxygen in the air to form nitrogen dioxide. NITROGEN DIOXIDE reacts with water to form nitric acid and nitric oxide. The liquid nitrogen oxide is very sensitive to detonation, in the presence of water (The Merck Index, Rahway (NJ), Merck and Co. Inc., 11th ed. 1989).

CALCIUM HYPOCHLORITE is slowly decomposed by water with the evolution of gaseous chlorine and heat. Experimental work at Argonne National Laboratory has determined that there is essentially no Cl2 gas formation; the substance is quite unreactive in water. This does not prevent Cl2 formation by a catalytic mechanism, but under normal conditions calcium hypochlorite is quite unreactive. The hydration reaction was rapid and quite exothermic. The small change in gas volume was attributed to this heating. (Argonne Report ANL/DIS-00-1, October 2000).

(MONO)-(TRICHLORO)-TETRA-(MONOPOTASSIUM DICHLORO)-PENTA-S-TRIAZINETRIONE is soluble in water. It may vigorously react with water releasing chlorine gas. Material containing less than 39% available chlorine will undergo reactions as described herein, but may take longer to initiate, and the resulting reaction may not be as vigorous [AAR 1992].

SODIUM DICHLORO-S-TRIAZINETRIONE may vigorously react with water releasing chlorine gas. Material containing less than 39% available chlorine will undergo reactions as described herein, but may take longer to initiate, and the resulting reaction may not be as vigorous [AAR 1992].

Potential Gas Byproducts

• Acid Fumes
• Chlorine (Cl2)
• Hydrogen Halide (HX)
• Nitrogen Oxides (NOx)
• Oxygen (O2)