# 42 CFR 84

> Respirator regulation in the United States, formerly colorimetry regulation for gas sampling ("gas detector tube units")

**Wikidata**: [Q130257149](https://www.wikidata.org/wiki/Q130257149)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/42_CFR_84)  
**Source**: https://4ort.xyz/entity/42-cfr-84


## References

1. [Source](https://commons.wikimedia.org/wiki/File:DHHS_Pub_96-101_NIOSH_Guide_to_the_Selection_%26_Use_of_Particulate_Respirators_Certified_Under_42_CFR_84.pdf)