Service life software for organic vapor cartridges.

The Occupational Safety and Health Administration believes chemical odor breakthrough is no longer an adequate, sufficient indicator for when workers should change chemical cartridges. Therefore, OSHA's 1998 revision to its respiratory protection standard, 29 CFR 1910.134, requires users of chemical cartridge respirators to implement a cartridge change schedule based on "objective information or data." In this way, used cartridges would be replaced before the chemical breaks through the cartridge at a level that could result in worker overexposure.