Chemicals from heat-not-burn tobacco devices not harmless, researchers warn

Heat-not-burn tobacco devices aren't harmless.
Heat-not-burn tobacco devices aren't harmless.

Chemical emissions from heat-not-burn tobacco devices are lower than from conventional cigarettes, but they're still high enough to be cause for concern, researchers report.

The makers of such devices claim that they produce a "clean" vapour that contains fewer irritants and cancer-causing chemicals than a traditional cigarette, and are therefore less dangerous.

Minimal emissions

"We found that the emissions from a widely used heat-not-burn device are not negligible," said first study author Lucia Cancelada, a former affiliate researcher in the US Department of Energy's Lawrence Berkeley Lab's Indoor Environment Group.

"These products are engineered so that it looks like hardly anything comes out of them; but just because the emissions are minimal doesn't mean they don't exist," Cancelada explained in a lab news release.

The team tested a battery-powered device that's sold in about 43 countries. It's not yet available in the United States, but it was approved by the US Food and Drug Administration earlier this year.

The device has a cigar-shaped electronic holder. A tobacco "heat stick" that resembles a short, thin cigarette and contains processed tobacco, glycerine and other additives is inserted into the holder, and a button is pressed to activate the heater.

The interior of the stick heats to between 180 and 220 degrees Celsius (356 to 428 Fahrenheit). The nicotine and other chemicals evaporate, rather than burn, and are inhaled through the filter in the mouthpiece as an aerosol.

Similar to electronic cigarettes

In the study, the researchers assessed levels of chemicals in the aerosol inhaled by the user and aerosolized chemicals emitted by the device that are not inhaled by the user, akin to secondhand smoke from tobacco cigarettes.

Levels from the heat-not-burn device are similar to those produced by electronic cigarettes, according to the study published recently in the journal Environmental Science & Technology.

Hugo Destaillats is a chemist in Berkeley Lab's Energy Technologies Area and deputy of the Indoor Environment Group. He said, "Heat-not-burn products, just like electronic cigarettes, emit aerosols – mixtures of gases and particles. In the case of electronic cigarettes, calling these emissions vapour is genius marketing, but misleading, because users may think they emit water vapour, making it less harmful in their minds."

But, Destaillats explained, "Neither e-cigarette refill liquids and cartridges, nor heat sticks, are water-based. Most contain a large amount of glycerine, and our previous research has shown that heat-driven breakdown of glycerine is a source of harmful chemicals."

Image credit: iStock

We live in a world where facts and fiction get blurred
In times of uncertainty you need journalism you can trust. For 14 free days, you can have access to a world of in-depth analyses, investigative journalism, top opinions and a range of features. Journalism strengthens democracy. Invest in the future today. Thereafter you will be billed R75 per month. You can cancel anytime and if you cancel within 14 days you won't be billed. 
Subscribe to News24
Voting Booth
Zama zama crackdown: What are your thoughts on West Village residents taking the law into their own hands?
Please select an option Oops! Something went wrong, please try again later.
Authorities should bring in the army already
11% - 2318 votes
Illegal miners can't be scapegoated for all crime
48% - 9934 votes
What else did we expect without no proper policing
37% - 7687 votes
Vigilante groups are also part of the problem
4% - 766 votes
Rand - Dollar
Rand - Pound
Rand - Euro
Rand - Aus dollar
Rand - Yen
Brent Crude
Top 40
All Share
Resource 10
Industrial 25
Financial 15
All JSE data delayed by at least 15 minutes Iress logo
Editorial feedback and complaints

Contact the public editor with feedback for our journalists, complaints, queries or suggestions about articles on News24.