The University of Texas at Austin
College of Engineering
IGERT - Indoor Environmental Quality
A Healthy Home is in Your Hands

vocs

VOCs

What are Volatile Organic Compounds (VOCs)?

Volatile organic compounds (VOCs) are a diverse group of chemicals that evaporate easily at room temperature, and they are capable of evaporating even when they are a part of consumer products used in a home on a daily basis1,2. The Environmental Protection Agency defines VOCs as any compound containing carbon, except for carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates, and ammonium carbonate, which participates in atmospheric photochemical reactions3,4. Common VOCs found in homes include benzene, toluene, texanol, xylene, and many more2,3,4.


What are the sources of VOCs in my home?

Volatile organic chemicals are widely used as ingredients in many household products and building materials. These products and materials are capable of releasing VOCs, whether they are simply stored or in use. A list of common VOC emission sources include furnishings, aerosol sprays, air fresheners, moth balls, and automotive products1,2,3. A significant level of VOCs can be observed in homes if one of following activities/items is present2:

  • New carpeting
  • New furniture
  • Idling automobile in attached garage
  • Recent painting
  • Chemicals stored in the home
  • Recently applied adhesives
  • New plastic or electronic devices


Can VOCs affect my health?

Concentrations of VOCs are higher indoors than they are outdoors, and can vary greatly between homes due to the different variety of consumer products used on a daily basis1. Levels of many VOCs can be 2 to 5 times higher indoors than they are outdoors, and it is thought that VOCs are a significant contributor to sick building syndrome1,2,3,4. VOCs can be very harmful at high concentrations, and have been shown to cause both short term and long term health effects1,2. Common symptoms caused by exposure to high levels of VOCs include:

  • Short Term Exposure
    • Eye irritation / watering
    • Nose irritation
    • Throat irritation
    • Headaches
    • Nausea / Vomiting
    • Dizziness
    • Asthma exacerbation
  • Long Term Exposure
    • Cancer
    • Liver damage
    • Kidney damage
    • Central Nervous System damage


How to reduce exposure to VOCs?

Mulitple sources list several ways to reduce your daily exposure to VOCs1,2,5:

  1. Use products as directed by the manufacturer.
  2. Discontinue the use of products that have high levels of VOCs.
  3. When purchasing products, look for the label: Environmentally Preferable Purchasing.
  4. Ventilate spaces where VOCs are used by opening doors and windows.
  5. Controlling climate is important, because some chemicals are sensitive to climate conditions, and as temperature and humidity increase, chemical release increases.
  6. Remove unused chemicals and keep them away from children and pets.


Where can I get more information?

For more information on VOCs and possible environmental effects, contact:


References:

  1. Volatile organic compounds - EPA, http://www.epa.gov/iaq/voc.html, accessed April 2008.
  2. Volatile Organic Compounds (VOCs) in Your Home - Minnesota department of health. http://www.health.state.mn.us/divs/eh/indoorair/voc/index.htm, accessed April 2008.
  3. Definition of Volatile Organic Compounds - EPA, http://www.epa.gov/ttn/naaqs/ozone/ozonetech/def_voc.htm, accessed April 2008.
  4. Volatile Organic Compounds - USGS, http://toxics.usgs.gov/definitions/vocs.html, accessed April 2008.
  5. How can I escape VOCs? - The Greenguide. http://www.thegreenguide.com/doc/ask/vocs, accessed April 2008.

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