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Replacement Indicators for Carbon Adsorbers, carbon Scrubbers and Filters
Funeral Homes , Embalming and Hospital Autopsy Rooms

Formaldehyde (Formalin) Emission Control

Formaldehyde (formalin) is the major and most toxic component of the embalming fluid used in funeral homes, embalming laboratories and hospital autopsy rooms. It is used to preserve the deceased for viewings and slower decomposition after burial. The use of Chemteq filter’s replacement indicator on the outlet of filter or carbon absorber alerts the user when filter or carbon absorber is saturated and exhausted. Our filter replacement indicators, not only ensures the health and well-being of the funeral homes and embalming laboratories, but also ensures that residents in the vicinity of these facilities are breathing formaldehyde-free air.

Filter's Replacement Indicator Sticker
Formaldehyde Vapor


Item No. 140-0000

The indicator changes color from light brown to dark blue when carbon absorber or filter is saturated with formaldehyde.

First noticeable color appears when indicator exposed to 0.4ppm for one hour.

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Custom Indicators are available
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Facts about formaldehyde

Formaldehyde is a colorless, flammable gas with a strong, pungent odor. The National Institute for Occupational Safety and Health (NIOSH) recommends that formaldehyde be handled as a potential occupational carcinogen and that appropriate controls be used to reduce worker exposure1. The Occupational Safety and Health Administration (OSHA) standard for formaldehyde requires an 8-hour time-weighted average (TWA) concentration limit of 3 ppm, a ceiling concentration of 5 ppm, and an acceptable maximum peak above the ceiling concentration of 10 ppm for no more than a total of 30 minutes during an 8-hour shift2.


  1. National Institute for Occupational Safety and Health: Occupational Exposure to Formaldehyde. DHEW (NIOSH) Publication No. 77-126 (1976).
  2. Occupational Safety and Health Administration:  General Industry OSHA Safety and Health Standards (29 CFR 1910). OSHA Publication 2206, Washington, D.C., p. 554 (Revised November 7, 1978).
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Filters Replacement Indicator
Formaldehyde Vapor


Item No. 183

The indicator changes color from light brown to dark blue when carbon absorber or filter is saturated with formaldehyde.

First noticeable color appears when indicator exposed to 0.4ppm for one hour.

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Funeral Homes, formalin, filter change indicator