Sulfur hexafluoride absorber

Health and Safety Factors. Sulfur hexafluoride is a nonflammable, relatively unreactive gas that has been described as physiologically inert (54). The current OSHA standard maximum allowable concentration for human exposure in air is 6000 mg/m (1000 ppm) TWA (55). The Underwriters Laboratories classification is Toxicity Group VI. It should be noted, however, that breakdown products of SF, produced by electrical decomposition of the gas, are toxic. If SF is exposed to electrical arcing, provision should be made to absorb the toxic components by passing the gas over activated alumina, soda-lime, or molecular sieves (qv) (56). 

OTHER COMMENTS sulfur pentafluoride is considered more toxic than phosgene and is not produced commercially liberated as a by-product during the synthesis of sulfur hexafluoride exit vapors may be absorbed by activated alumina and soda lime. 

Amos et al. used sulfur hexafluoride as an absorbing tracer to assess riser gas mixing [85]. They also reviewed some earlier studies and pointed out discrepancies... 

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