Vertrel Solvents - Product Specification Footnotes

Exposure limits are computed under various assumptions. Here are brief explanations of those assumptions:

An Acceptable Exposure Limit (AEL) is an airborne inhalation exposure limit established by DuPont that specifies time-weighted average concentrations to which nearly all workers may be repeatedly exposed without adverse effects. DuPont commonly uses 8-hour time-weighted averages and 12-hour time-weighted averages. Based on animal studies, these exposure limits assume the technicians will be exposed to the chemical during a working career of thirty years.
A ceiling limit is the concentration that should not be exceeded during any part of the working day. A ceiling limit for any individual component becomes the ceiling limit to the final blended product as well.
A Threshold Limit Value (TLV) is an air-borne inhalation exposure limit established by the American Conference of Government and Industrial Hygienists (ACGIH) that specifies the time-weighted average concentrations to which nearly all workers may be repeatedly exposed without adverse effects.
AELs assigned by DuPont and reported on these Spec Sheets are calculated in accordance with the ACGIH formula for computing the TLVs for mixtures.
A STEL is a short-term exposure limit established by ACGIH.

For more information about toxicity and exposure limits, readers are directed to the relevant Frequently Asked Questions which are full of technical details. In particular, engineers should review:

FAQ 13 offers a general discription of safety characteristics that pertain to Vertrel^®
FAQ 80 is a brief FAQ designed to be shared with personnel who are not trained in the details of toxicity studies. Use this FAQ to answer basic questions about the safety of Vertrel^® in and around the factory
FAQ 81 is a slightly more technical discussion about toxicity testing and the exposure limits of the Vertrel^® solvents. This FAQ also looks at the toxicity of similar cleaners and solvents, and at the ingredients in the different Vertrel^® products
Lastly, FAQ 82 takes a look at the operational aspects of using the Vertrel^® products in the factory. This FAQ is a great one to review before finishing the installation of a new cleaning system.


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	A Brief Explanation of Exposure Limits and Their Calculations

		Exposure limits are computed under various assumptions. Here are brief explanations of those assumptions: An Acceptable Exposure Limit (AEL) is an airborne inhalation exposure limit established by DuPont that specifies time-weighted average concentrations to which nearly all workers may be repeatedly exposed without adverse effects. DuPont commonly uses 8-hour time-weighted averages and 12-hour time-weighted averages. Based on animal studies, these exposure limits assume the technicians will be exposed to the chemical during a working career of thirty years. A ceiling limit is the concentration that should not be exceeded during any part of the working day. A ceiling limit for any individual component becomes the ceiling limit to the final blended product as well. A Threshold Limit Value (TLV) is an air-borne inhalation exposure limit established by the American Conference of Government and Industrial Hygienists (ACGIH) that specifies the time-weighted average concentrations to which nearly all workers may be repeatedly exposed without adverse effects. AELs assigned by DuPont and reported on these Spec Sheets are calculated in accordance with the ACGIH formula for computing the TLVs for mixtures. A STEL is a short-term exposure limit established by ACGIH. For more information about toxicity and exposure limits, readers are directed to the relevant Frequently Asked Questions which are full of technical details. In particular, engineers should review: FAQ 13 offers a general discription of safety characteristics that pertain to Vertrel^® FAQ 80 is a brief FAQ designed to be shared with personnel who are not trained in the details of toxicity studies. Use this FAQ to answer basic questions about the safety of Vertrel^® in and around the factory FAQ 81 is a slightly more technical discussion about toxicity testing and the exposure limits of the Vertrel^® solvents. This FAQ also looks at the toxicity of similar cleaners and solvents, and at the ingredients in the different Vertrel^® products Lastly, FAQ 82 takes a look at the operational aspects of using the Vertrel^® products in the factory. This FAQ is a great one to review before finishing the installation of a new cleaning system.


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