The NIOSH IDLH data contain air concentration values used by NIOSH as respirator selection criteria. This compilation is the rationale and sources of information used by NIOSH during te original determination of 387 IDLHs and their subsequent review and revision in 1994. This data is extremely valuable to toxicologists, persons concerned with use of respirators, industrial hygienists, persons concerned with indoor air quality, and emergency response personnel. Users can compare NIOSH limits to other limits.
We take your privacy seriously. You can review and change the way we collect information below.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
Cookies used to make website functionality more relevant to you. These cookies perform functions like remembering presentation options or choices and, in some cases, delivery of web content that based on self-identified area of interests.
Cookies used to track the effectiveness of CDC public health campaigns through clickthrough data.
Cookies used to enable you to share pages and content that you find interesting on CDC.gov through third party social networking and other websites. These cookies may also be used for advertising purposes by these third parties.