Dangerous reactions NFPA Code

The Code du travail and NFPA hazard codes are explained in Part I in the references that are concerned with each risk. For inorganic products the inflammability, reactivity and toxicity codes are mentioned. For organic products the toxicity code is the only one that is given. Indeed, the inflammability code can be found easily (see para 1.5.1) and the reactivity code is included in chapter 6 under dangerous reactions of inorganic products. 

HAZARD RISK Dangerous fire hazard when exposed to heat or flame contact with strong oxidizers may cause fire vapors may flow to distant ignition sources and flash back forms explosive mixtures with powdered sodium or phosphorus trichloride and sodium violent reaction with silver perchlorate and dimethyl sulfoxide closed containers exposed to heat may explode decomposition emits toxic gases of hydrogen chloride, phosgene, carbon monoxide, carbon dioxide NFPA Code H 2 F 3 R 0. 

HAZARD RISK Explosive when mixed with nitrogen tetroxide, dimethyl amino propy amine or liquid ammonia vigorous reaction when mixed with propylene dichloride, orthodichlorobenzene and aluminum incompatible with strong oxidizers, strong caustics and active metah such as aluminum, powdered magnesium, sodium or potassium decomposition emits toxic vapors dangerous fire hazard if exposed to heat, flame or oxidizers NFPA code H 2 F 3 R 0. 

HAZARD RISK Fire hazard when exposed to heat or flame moderate explosion hazard gas more dangerous than vapor under fire conditions tank rupture produces accumulation of toxic fumes explosive reaction with nitrogen oxides, performic acid and peroxide decomposition emits acrid smoke and fumes NFPA Code H 3 F 4 R 0. 

HAZARD RISK Very dangerous fire hazard may explode on heating may form explosive vapor/air mixtures flashback along vapor trail may occur ignites on contact with car-bon/hopcalite mixtures many reactions result in fire or explosion NFPA Code H 1 F 3 R 2. 

HAZARD RISK Very dangerous fire hazard when exposed to heat or flame reactions with aluminum can lead to explosions decomposition emits toxic fumes of Cl" NFPA Code H 2 F3 R0. 

HAZARD RISK Highly dangerous fire hazard when exposed to heat, flame or oxidizers may undergo spontaneous exothermic polymerization reaction with air or water to form peroxides that form explosions reacts with ozone to form explosive vinyl acetate ozonide vapor may react vigorously with desiccants NFPA Code H 2 F 3 R 2. 

All hazardous substances must be stored and labeled properly. All containers, no matter how minute the quantity, should be compatible with the material they contain and properly labeled to prevent accidental misuse. The National Fire Protection Agency (NFPA) Codes and 29 CFR 1910 dictate the proper storage, grounding, and dispensing of hazardous materials. Dangerous chemical reactions can result if certain substances are mixed together. ... 

When analysing the previous table, it shows the ambiguity of NFPA reactivity codes vis-a-vis instability. It is not so much an instability code but rather, like its name indicates, a code related to dangerous chemical reactions. Degrees 3 and 4 are the only ones that are more or less usable for defining an instability level, with the exception of ethylene oxide. So, even ethylene oxide s main hazard is not its explosive decomposition but its very violent polymerization caused by catalytic impurities (see chapter 6). 

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