Formaldehyde ChromAir Badge

Color change for Formaldehyde is from yellowish-brown to brown.

The ChromAir Formaldehyde badge may be used for personnel or area monitoring for exposure times ranging from 15 minutes to 2 days.

Introduction:

Formaldehyde is a colorless gas with a pungent, suffocating odor. It is a potent irritant to eyes, throat, and nose. The most common effects of low-level formaldehyde inhalation are eye, nose, and upper respiratory irritation. Chronic symptoms of exposure are itching eyes, dry and sore throat, and possible difficulty in sleeping and unusual thirst after awakening. OSHA exposure limit for formaldehyde is 0.75 ppm (TWA). NIOSH exposure limit is 0.016 ppm (TWA). NIOSH also recommends that formaldehyde be handled as a potential occupational carcinogen in the workplace.

Formaldehyde workplace exposure occurs because of its extensive use as an industrial chemical in the manufacturing of resins for adhesives, plastics, coatings, and fabrics. Additional exposure to formaldehyde emissions comes from its use as a fumigant and sterilant. The major source of atmospheric discharge of formaldehyde is from combustion processes, specifically from the photo-oxidation of hydrocarbons in auto emissions.

Principle of Operation:

The ChromAir passive monitor is a patented direct-read autogenic exposimeter. The device is constructed from six cells attached on one side to a flat indicator layer and on the other side to a series of different diffusive resistances. Carbon monoxide gas diffuses to the cells through the different diffusive resistances and reacts with the indicator layer, producing color change from light brown to brown to black. The color produced on the indicator layer is a direct measure of the exposure dose. Visual color comparison is achieved by observing the formation of the brown threshold color on the individual cell and reading the corresponding exposure dose.

Pictured above is the additional color comparator that is used for higher resolutions and accuracy (available for Carbon Monoxide, Formaldehyde, Mercury).

Operating Instructions:

1. Remove the pouch from refrigerator and allow it to warm to room temperature.

2. Remove the badge from its protective pouch.

3. Enter all pertinent information on the I.D. label before monitoring is started (i.e. name, location, date and start time).

4. Prior to exposure, remove the protective strip from the first cell on the front of the badge.

5. For personnel monitoring, attach the badge near the user's breathing zone (i.e. collar) with the front side exposed to the surrounding atmosphere.

6. For area monitoring, attach the badge to a stand and mount in a centralized area with the front side exposed to the surrounding atmosphere.

7. Check the back side of the badge periodically to determine the exposure dose (ppm•hr).

8. To read the badge, locate the highest level cell with brown threshold color.

9. To obtain the average concentration (ppm) in the surrounding atmosphere, divide the exposure dose (ppm•hr) by the exposure time in hours.

EXAMPLE: If the sampling time is 2 hours and the badge reads 10 ppm•hr, the average conc

Storage:

The ChromAir formaldehyde monitor should be refrigerated in its sealed bag at all times.

Sampling Parameters:

Downloads:

380007 Manual

Formaldehyde Information