Hazard identification fumes

United Nations/North American Identification Number(s) UN/NA identification numbers are four-digit numbers assigned to identify and cross-reference a hazardous materials (i.e., nitric acid, fuming = 2032 butane = 1011 white phosphorus, dry = 1381). 

The first concern in identification of an unknown waste is safety. The laboratory worka- who carries out the procedures should be familiar with the characteristics of the waste and any necessary precautions. Because the hazards of the materials being tested are unknown, it is imperative that proper personal protection and safety devices such as fume hoods and shields be employed. Older samples can be particularly dangerous because they may have changed in composition, for example, through the formation of peroxides. (See Chapter 3, section 3.D.3.2, and Chapter 5, section 5.G.3, for more information on peroxides.)... 

The hazardous chemicals on the list can cover a variety of physical forms including liquids, solids, gases, vapors, fumes, and mists. Sometimes hazardous chemicals can be identified using purchase orders. Identification of others requires an actual inventory of the facility. 

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