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Updated Science & Data: Inhalation Unit Risk for Cr6


About:  This page is a repository for the latest research, data, information, and publications surrounding the inhalation unit risk for hexavalent chromium (Cr6).   

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Submitted: June 30, 2025
Petition to CARB by: California Metals Coalition, California Chamber of Commerce, California Manufacturers and Technology Association, Los Angeles Business Federation (LA BizFed), American Chemistry Council, Metal Treating Institute, National Federation of Independent Business (NFIB), Recycled Materials Association--West Coast Chapter, Aluminum Association, American Foundry Society, California Alliance of Small Business Associations, Independent Lubricant Manufacturers Association, Industrial Environmental Association, Industrial Fasteners Institute, Metal Finishing Association of California, National Association for Surface Finishing, National Tooling and Machining Association, and Precision Metalforming Association.
​Download Petition Here


Published: May 28, 2025
Citation: 
Bruce C. Allen, Melissa Vincent, Loren Lipworth, Julie M. Panko, Mina Suh, Xiaohui Jiang, Michael T. Mumma, and Deborah M. Proctor.  Lung cancer risk assessment associated with exposure to hexavalent chromium: Results of pooled analysis of three cohorts;  Journal of Occupational and Environmental Hygiene.  
"Combined Cohort":  Download PDF Here
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Published: January 8, 2025
Citation: Loren Lipworth, Julie M. Panko, Bruce C. Allen, Michael T. Mumma, Xiaohui Jiang, Melissa J. Vincent, Jennifer L. Bare, Todor Antonijevic, Stephanie N. Vivanco, Donald E. Marano, Mina Suh, Sarah Cohen, Liz Mittal & Deborah M. Proctor: Lung cancer mortality among aircraft manufacturing workers with long-term, low-level, hexavalent chromium exposure; 
Journal of Occupational and Environmental Hygiene
"Burbank Cohort": Download PDF Here


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Presented: September 2024; Deborah M. Proctor
Conference: International Society for Environmental Epidemiology (ISEE)
Poster: Quantitative Lung Cancer Risk Assessment Associated with Hexavalent Chromium: Results Using Pooled Analysis of Three Cohorts: Download Here


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Presented: March 2024; Bruce C. Allen, Bruce Allen Consulting
Conference: Society of Toxicology (SOT)
Poster
: Lung Cancer Risk and Exposure to Hexavalent Chromium: Results of Extended Mortality Study of Workers with Low Level Exposures and Quantitative Risk Assessment Using Pooled Analysis of Three Cohorts: Download Here

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