Be familiar with the exposure warning properties of the chemicals handled.
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Chemical Warning Properties and Exposure Assessments
Some compounds have good warning properties. This means that they can be detected in air through odor or perhaps mild irritation at levels below which they are toxic. Learn whether the materials you handle have good warning properties. If they do, these properties can serve as an early exposure warning system — material being released into the air may warrant additional controls. However, be aware that individual odor thresholds vary widely for some compounds and that the olfactory system can become fatigued (loose its sense of smell) after short-term exposure to some compounds.
If you are concerned about your level of exposure, or believe you are displaying symptoms of overexposure to one or more chemicals you handle, Yale's OEHS is available to perform a qualitative and/or quantitative exposure assessment. An exposure assessment is also appropriate if you are handling a highly toxic material regularly (3-4 times per week) or for 3-4 hours at a time, particularly if handled on the open bench. Call OEHS if you have any questions regarding your exposure to chemicals.
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