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Original site: www.cdc.gov/niosh/npg/nengapdx.html | RestoredCDC.org is an independent project, not affiliated with CDC or any federal entity. Visit CDC.gov for free official information. Due to archival on January 6, 2025, recent outbreak data is unavailable. Videos are not restored. Access data.restoredcdc.org for restored data. Use of this site implies acceptance of this disclaimer.[More]About Us Report Bug Compare ContentSkip directly to site content Skip directly to page optionsThe National Institute for Occupational Safety and Health (NIOSH)Centers for Disease Control and Prevention. CDC twenty four seven. Saving Lives, Protecting PeopleSearchSearch Menu Navigation Menu× NIOSHNIOSH All CDCSubmit* Introduction* Search the Pocket Guide* Chemical Names, Synonyms and Trade Names+ BACKChemical Names, Synonyms and Trade Names+ A+ B+ C+ D+ E+ F+ G+ H+ I+ J+ K+ L+ M+ N+ O+ P+ Q+ R+ S+ T+ U+ V+ W+ X+ Y+ Z+ The National Institute for Occupational Safety and Health (NIOSH) Home* CAS Numbers* RTECS Numbers* Appendices+ BACKAppendices+ A – NIOSH Potential Occupational Carcinogens+ B – Thirteen OSHA-Regulated Carcinogens+ C – Supplementary Exposure Limits+ D – Substances with No Established RELs+ E – OSHA Respirator Requirements for Selected Chemicals+ F – Miscellaneous Notes+ G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect+ Type C & CE – Definitions for Type C and Type CE Respirators+ Personal Protection and Sanitation Codes+ First Aid Procedures+ The National Institute for Occupational Safety and Health (NIOSH) Home* The National Institute for Occupational Safety and Health (NIOSH) HomeThe National Institute for Occupational Safety and Health (NIOSH)1. NIOSH2. NIOSH Pocket Guide to Chemical HazardsAppendicesAppendicesRelated Pages* Appendix A – NIOSH Potential Occupational Carcinogens* Appendix B – Thirteen OSHA-Regulated Carcinogens* Appendix C – Supplementary Exposure Limits* Appendix D – Substances with No Established RELs* Appendix E – OSHA Respirator Requirements for Selected Chemicals* Appendix F – Miscellaneous Notes* Appendix G- 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect* Type C & CE- Definitions for Type C and Type CE Respirators* Personal Protection and Sanitation Codes* First Aid ProceduresPage last reviewed: October 17, 2018Content source: National Institute for Occupational Safety and Health* SyndicateNIOSH Pocket Guide to Chemical Hazards* Introduction* Search the Pocket Guide* Chemical Names, Synonyms and Trade Names+ A+ B+ C+ D+ E+ F+ G+ H+ I+ J+ K+ L+ M+ N+ O+ P+ Q+ R+ S+ T+ U+ V+ W+ X+ Y+ Z* CAS Numbers* RTECS Numbers* Appendices+ A – NIOSH Potential Occupational Carcinogens+ B – Thirteen OSHA-Regulated Carcinogens+ C – Supplementary Exposure Limits+ D – Substances with No Established RELs+ E – OSHA Respirator Requirements for Selected Chemicals+ F – Miscellaneous Notes+ G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect+ Type C & CE – Definitions for Type C and Type CE Respirators+ Personal Protection and Sanitation Codes+ First Aid ProceduresFollow NIOSH* YouTubeNIOSH Homepage* Workplace Safety & Health Topics* Publications and Products* Programs* Contact NIOSH* About CDC* Contact Us* 800-232-4636Facebook Twitter Instagram LinkedIn Youtube Pinterest SnapchatFacebook Twitter Instagram LinkedIn Youtube Pinterest Snapchat RSS* CONTACT CDCContact UsCall 800-232-4636Email Us* ABOUT CDC+ About CDC+ Jobs+ Funding* POLICIES+ Accessibility+ External Links+ Privacy+ Policies+ Web Policies+ No Fear Act+ FOIA+ OIG+ No Fear Act+ Nondiscrimination+ Vulnerability Disclosure Policy+ CDC Archive+ Public Health Publications+ HHS.gov+ USA.gov* CONNECT WITH US+ Youtube+ Snapchat* LANGUAGES+ Español+ 繁體中文+ Tiếng Việt+ 한국어+ Tagalog+ Русский+ العربية+ Kreyòl Ayisyen+ Français+ Polski+ Português+ Italiano+ Deutsch+ 日本語+ فارسی+ English* U.S. Department of Health & Human Services* Accessibility* External Links* Privacy* Policies* Web Policies* FOIA* OIG* No Fear Act* FOIA* Nondiscrimination* OIG* Vulnerability Disclosure Policy* CDC Archive* Public Health Publications* HHS.gov* USA.govContent Credential×This image was edited or created using GenAI (generative artificial intelligence).Our experts review all images in an effort to ensure accuracy and quality before use.Learn more about CDC's usage of GenAI.
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