printech, January, 2004
NIOSH Releases Program On Estimating Respiratory Cartridge Life

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From: Gary Jones ( )
Date: Mon, 05 Jan 2004 19:32:20

FYI - From Occupational Health and Safety eNews at

NIOSH offers help for air-purifying cartridge calculation

Respiratory protection program administrators sneed help figuring out how relative humidity affects the service life of organic vapor chemical cartridges, according to NIOSH, which has released new computer software to help them.

Calculating the effective life of an air-purifying cartridge is vital for protecting the user, NIOSH Director Dr. John Howard noted. "Especially in situations when the use of air-purifying respirators may be necessary for hours, knowing when to change the organic vapor cartridge is critical for keeping the user safe and healthy," he said. "By adding in a key factor that was not included in previous government software, program administrators can feel more confident in the schedules they set for changing cartridges."

The new software, "Breakthrough: Single Vapor Beta Version 3.0.0, expiration date December 2004," resulted from research at Los Alamos National Laboratory in conjunction with a partnership of NIOSH, OSHA, the International Safety Equipment Association, the American Chemistry Council and others. It is currently available as a download from OSHA's Web site at The download includes a digital training video illustrating the use of the program .

The software soon will be available from NIOSH in CD-ROM format, complete with the digital training video; call (800) 35-NIOSH (356-4674).

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