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Considerations for Modifications to OSHA Method 47 Air Monitoring Method: Diphenylmethane Diisocyanate (MDI) 

The purpose of this document is to provide considerations for modifications to the Occupational Safety and Health Administration (OSHA) air sampling method for MDI: OSHA Method 47. These modifications can help improve the ability of the method to sample and derivatize MDI. The information provided in this document is not a directive or an industry standard. The information is intended as guidance. Users should independently determine what constitutes an appropriate practice relative to their own needs and circumstances.

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American Chemistry Council

The American Chemistry Council’s mission is to advocate for the people, policy, and products of chemistry that make the United States the global leader in innovation and manufacturing. To achieve this, we: Champion science-based policy solutions across all levels of government; Drive continuous performance improvement to protect employees and communities through Responsible Care®; Foster the development of sustainability practices throughout ACC member companies; and Communicate authentically with communities about challenges and solutions for a safer, healthier and more sustainable way of life. Our vision is a world made better by chemistry, where people live happier, healthier, and more prosperous lives, safely and sustainably—for generations to come.