Asphalt roofers

Partanen T, Boffetta P Cancer risk in asphalt workers and roofers review and meta-analysis of epidemiologic studies. Am J Ind Med 26(6) 721MO, 1994... 

Table 4. Degrees of evidence for carcinogenicity in humans and experimental animals and overall evaluation of carcinogenicity to humans for agents to which asphalt workers and roofers may be or may have been exposed, as evaluated by lARC as of 1993 ...

Asphalt Blending Stock Roofers Flux Tetraethyl Pyrophosphate Aniline... 

Asphalt Blending Stocks Roofers Flux — Fire Hazards Flash Point (deg. F) 300 - 350 CC ... 

Potential exposure to PAHs in road sealing work involving coal tar and bitumen was discussed by Darby et al. (1986). In a study to evaluate inhalation and dermal exposures of 10 roofers removing an old coal tar pitch roof and applying a new asphalt roof, the PAH content of forehead skin wipes taken at the end of the workshift (0.097 pg/cm equivalent to an estimated daily skin exposure of 19.4 pg/day) was found to correlate with the PAH concentrations in personal air samples (10.2 pg/m ) (Wolff et al. 1989c). Relative concentrations of PAHs in air and wipe samples were fluoranthene > pyrene > benz[a]anthracene > benzo[a]pyrene > benzo[b]fluoranthene > benzo[g,h,i]perylene > benzo[k]fluoranthene. Anthracene was found in the air samples but was not detected in the wipe samples. 

A study of proportionate mortality among the 11,144 members of the United Union of Roofers, Waterproofers, and Allied Workers (Stem et al. 2000) found a significant excess in mortality due to pneumoconioses and other nonmalignant respiratory diseases in these workers compared with U.S. age-, gender-, and race-specific proportional mortality rates for the years of the study (1950-1996). These workers were occupationally exposed to asphalt fumes and asbestos as well as coal tar pitch volatiles. Cigarette smoking is a potential confounding factor that, due to the nature of the study, could not be evaluated. 

Other dermatologic problems among commercial roofers not necessarily related to coal tar exposure include scars/keloids and fiberglass dermatitis (Emmett 1986). Few dermatologic problems have been associated with asphalt apart from the occasional thermal burn. Asphalt is derived from petroleum and is made up of the non-volatile hydrocarbons left after petroleum has been refined into gasoline and other products. Air-blown asphalts, which are produced from petroleum residue at temperatures between 400 F and 600 °F, are primarily used in roofing materials. In addition to thermal burns, irritant contact dermatitis occurs from the defatting action of repeated exposure to these chemicals (Mackison et al. 1981). 

Inhibited Fluosilicic Acid Fluosulfonic Acid Fluosulfonic Acid Calcium Fluoride Fluosilicic Acid Calcium Fluoride Fluosulfonic Acid Asphalt Blending Stock, Roofers Flux Asphalt Blending Stock. Roofers Flux Oil Spray... 

ASPHALT BLENDING STOCK (ROOFERS FLUX) Aaptalmoi OR Fin OB, TmBosi. RoadORIteiMiBlOR NL P 1 P ... 

Asphalt Blending Stocks Roofers Flux — Fire Hazards Flash Point (deg. F) 300 - 350 CC Flammable Limits in Air (%) Not peninent Fire Extinguishing Agents Water, foam, dry chemical or carbon dioxide Fire Extinguishing Agents Not To Be Used Water or foam may cause foaming Special Hazards of Combustion Products ... 

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