Classification of chemical dangerous goods
　　A: a feature of the fire risk of this kind of goods have 6 points:
　　1, the <28 C flash point liquid. Such as: -20, ethanol acetone flash flash 12 DEG C.
　　2, the lower limit of <10% gas explosion, as well as water or air in the role of water vapor, can produce a lower limit of <10% gas explosion of solid material. Such as: 10% of lower explosive limit of butane gas explosion limit is 1.9%, lower explosion limits of methane is 5.0%,; solid material calcium carbide (calcium carbide) encounters water to react to produce lower explosive limit (< 10% gas ethyne (acetylene), the explosion limit of acetylene is 2.8-81%.
　　3, at room temperature can be broken down or in the air oxidation that can lead to the rapid spontaneous combustion or explosion of the material.
　　Such as: cotton, yellow phosphorus.
　　4, at room temperature by water or air in the role of water vapor can produce combustible gas and cause combustion or explosion of the material. Metal sodium, metal potassium,
　　5, acid, heat, impact, friction and the case of organic matter or sulfur and other flammable inorganic substances, easily lead to combustion or explosion of strong oxidizing agent. Such as: potassium, sodium hypochlorite.
　　6, by impact, friction, or with the oxidant, organic matter can cause combustion or explosion of the material. Such as five sulfide, three phosphorus sulfide, etc..
　　B: there are 6 characteristics of the fire danger of this kind of goods:
　　1, the flash point is greater than or equal to 28 DEG C to <60 DEG C liquid. Turpentine flash 35 C, 28 C flash isobutanol.
　　2, the gas explosion limit of not less than 10%. Such as: ammonia, ammonia etc..
　　Oxidant 3, does not belong to the cpi. Such as: sodium dichromate, potassium chromate.
　　5, the combustion gas. Such as: oxygen.
　　6, contact with the air at room temperature can be slow oxidation, heat accumulation of the goods caused by spontaneous combustion.