ChemRisk^® scientists have evaluated the respiratory hazards associated with a wide range of airborne chemicals., including diacetyl, hydrogen sulfide, hydrogen chloride, 2-ethylcyanoacrylate (ECA), carbon monoxide, fluoropolymers, ozone and diesel emissions. We offer a complete spectrum of services for conducting quantitative health risk assessments of these chemicals. Some of our professionals are international authorities on developing and applying methods for estimating or predicting possible chemical exposure in various occupational and environmental settings. Our scientists have participated in scientific advisory panels sponsored by government agencies concerning these chemicals and, have become recognized experts in conducting health risk assessments for airborne exposures. We are experts in evaluating current methods for assessing occupational irritants and proposing new approaches to setting occupational exposure limits.

Some of our relevant project experience in this area includes:

• assessing the respiratory toxicity of diacetyl in popcorn packaging facilities and flavoring industries, with an emphasis on a possible causal relationship between diacetyl exposure and bronchiolitis obliterans;
• evaluating the respiratory risk factors in numerous “outbreaks” involving consumer use of fluoropolymer-containing tile sealants; and
• proposing new methods for setting occupational limits for sensory irritants.
We recognize the special considerations necessary for conducting health hazard evaluations of inhalation irritants, and have specialized in the following areas:


• Indoor and outdoor air dispersion modeling
• Simulation studies
• Mass transfer relationships to characterize evaporation
• Probabilistic (Monte Carlo) assessments
• Child-specific risk assessments
• Regulatory environmental fate and transport models
• Background levels in the ambient and indoor environment
• Environmental chemistry, partitioning and half-lives