Materials water reactive

Clean and chemically dry vessel prior to charging water reactive material... 

Gibson D, Weber, Handbook of Selected Properties of Air and Water Reactive Materials , NAD-RDTR-144 (1969) 25)P.M. Kirke-... 

Water-reactivity Release of water-reactive material and energetic reaction with water or humidity... 

Substances that are water-reactive will nearly always be identified as such on their MSDSs or ICSCs. They may be identified as DOT/UN Hazard Class 4.3 materials for shipping purposes and labeled as dangerous when wet. However, some water-reactive materials are classified otherwise. Acetic anhydride is designated Class 8 it may also be identified as a combustible liquid. 

The means by which a quench system works depends on the nature of the reactive material e.g., for water-reactive materials, a quench system will destroy the material in a last-resort situation and generally form less-hazardous products, and will at the same time absorb some of the heat of reaction. Most quench systems are designed to both cool down and dilute a material that may be reacting uncontrollably the quenching medium may also actually interfere with the chemical reaction or deactivate a catalyst. 

Inadvertent contact of a water-reactive material with water is obviously the most important issue regarding what can go wrong. Due to the prevalence of water in living tissues, water-reactive materials are often toxic or corrosive as well, so loss of containment is often an additional concern. The following are some of the possible causes of uncontrolled reactions associated with water-reactive materials ... 

Water-reactive materials, screening methods, 47,49-50, 51 Worked examples, 119-134 combustor, 120, 122-124,125 intentional chemistry, 119-120,121 mixing, 128,130-132 oxygen system, 133-134 physical processing, 128,129 repackaging, 124,126-127... 

During the process operation, water was introduced into the blender, probably as a result of a mechanical failure. Operators noticed the production of heat and the release of foul-smelling gas. During an emergency operation to offload the blender of its reacting contents, the material ignited and a deflagration occurred. The most likely cause of this incident was the inadvertent introduction of water into water-reactive materials (USEPA-OSHA, 1997). 

Firefighting for unstable materials is based on generally accepted fire service tactics, provided the unique characteristics of the material are considered. If the material is extremely flammable, then additional spacing distances should be implemented. If it reacts violently with water, other means of extinguishment should be considered. Table 8-14 provides a listing of several unstable, reactive, and water-reactive materials. 

Water Reactive Materials Water is sometimes used to flush spills and to reduce or direct vapors in spill situations. Some materials can react violently or even explosively with water. In these cases, consider letting the fire bum or leaving the spill alone until technical advice can be obtained. These materials require technical advice since ... 

Hazardous Reactions with Water-Reactive Materials. Accdg to Refs 1,2,3 5, w reacts with a variety of elements, compds and mixts to generate at RT either an expln or a combustion reaction because of the hydrogen released and the heat of reaction. Table 1 presents an identification of the reactants, and a generalized classification of the results of these reactions into either expln or combustion . From Ref 3, a more quantitative approach yielded data in terms of temp increase and the time required to reach the max temp on a selected group of w-reactants (Table 2). Table 3 displays the results of an attempt to determine if the order of addition (effects of dilution and/or surface... 

Classification of Hazardous Reactions Generated from the Reaction of Water with Water-Reactive Materials (from Refs 1,2,3 8t 5)... 

Hazards of Materials, Water-Reactive Materials and Organic Peroxides , TSA-20-72-2, US Bu-Mines, Pittsburgh, Contract DOT-AS-00007 (1972) 4) D.L. Katz, LNG-Water Explo-... 

Properties of Air- and Water-Reactive Materials , Naval Ammo Depot RDTR144, Crane (1969), 64... 

Weber, Handbook of Selected Properties of Air- and Water-Reactive Materials , RDTR No 144, NAVAMDEP, Crane (1969), 25-26 18) R.Kh. Kurbangalina, Dependence of Critical Diameter of Liquid Explosives on Content of Powders , LA-TR-20-8, translated by H. Dahlby from ZhPriklMekhTekhFiz (4), 133-36 (1969) CA 71,126697 (1969) 19) A.S. Derzhavets,... 

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