Blueair smokestop replacement filter problem

by Marinos Georgiades


I have the Blueair air purifier 270E with Smokestop filter. There is an unpleasant odor coming from the filter when the air purifier is in operation. Blueair sent me another air purifier, same model, but the same problem exists.

This is the filter used in my air purifier:

The web page mentions the following:
Eliminate smoke and odors

The SmokeStop™ is specifically designed for environments with heavy gaseous pollutants, such as smoke, odors, and harmful VOCs.

Approximately 2 - 4 lbs of activated carbon, formulated with magnesium dioxide and copper oxide, work in the form of hundreds of pellets to trap dangerous chemicals and annoying odors.

When I have the air purifier in operation, there is a kind of unpleasant odor that comes from the Smokestop filter. During the first days of use, this odor was stronger, and after a few months of use, it is less.

After a relevant comment of another customer at, I did some research about "magnesium dioxide" (or "magnesium peroxide" which is most commonly named), and I found the following information (Pohanish, 2011: 1645) with regard to harmful effects:

Harmful Effects and Symptoms
Short Term Exposure: Magnesium peroxide can affect you when breathed in. Contact can irritate or even burn the skin and eyes. Breathing the dust can irritate the air passages, causing sore throat and/or cough with phlegm. Long Term Exposure: This chemical is a very irritating substance and it may cause lung effects or damage.
Points of Attack: Lungs.
First Aid: If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit.

Similar information is given by Solvay (Solvay America Inc.) in the safety summary of Magnesium Peroxide.

The aforementioned information makes me worry about any hazards the Blueair Smokestop filter with the magnesium dioxide may cause to my health. What is your opinion on this issue, please?
I also contacted Blueair about this issue, but they didn't give me an answer, although they said they would.

Thank you,


Pohanish, Richard P. (2011). Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens. William Andrew. pp. 1645–1646.ISBN 1437778704.

Solvay America Inc. "Product Safety Summary: Magnesium Peroxide",

Comments for Blueair smokestop replacement filter problem

Average Rating starstarstarstarstar

Click here to add your own comments

Mar 09, 2016

by: Mark


Is it dangerous? I'm going to do some research on it.

Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Air Purifier Questions.

Q: Which Air Purifier is Best for Me?

Find Out Now!


  • Comparison Charts
  • Technologies Explained
  • Video Reviews .. plus:
  • Money-Saving Coupons

Get Your Copy Below ..It's 100% Free