I just tried to run ALOHA for a sulfuric acid spill, but found that it isn in the chemical library. Its a really important hazardous substance–why isn it in ALOHA?
A. By ALOHA’s standards, sulfuric acid is not volatile enough to be considered an outdoor air dispersion hazard, even though it is hazardous when inhaled. That is, under normal conditions, it cannot enter the atmosphere fast enough to reach concentrations hazardous to people within a large area. You can see this by checking its properties in CAMEO Chemicals. CAMEO Chemicals reports that the vapor pressure of sulfuric acid is only 1 millimeter at 294.8 degrees F. This is a very low vapor pressure. At the same temperature, water is a gas with a much higher vapor pressure of about 44,000 millimeters. Note: ALOHA’s library only includes chemicals from CAMEO Chemicals that meet ALOHA’s standards for air dispersion hazards. ALOHA’s library primarily includes pure chemicals; however, there are a few solutions and one mixture. The mixture is oleum, which is a combination of sulfuric acid and sulfur trioxide. (Oleum is also known as fuming sulfuric acid.) However, you should not use this mixtur
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