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Formaldehyde in Electronic Cigarette Liquid (Aerosolized Liquid).

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Formaldehyde, a toxic chemical, was detected in 25% of e-liquid products tested. This carcinogen was found in both flavored and non-flavored e-liquids, particularly in disposable devices and pods.

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Area of Science:

  • Environmental Chemistry
  • Toxicology
  • Public Health

Background:

  • E-cigarette liquids (e-liquids) contain undisclosed toxic chemicals beyond solvents and nicotine.
  • Formaldehyde, a known carcinogen and contact dermatitis trigger, has been reported in e-cigarette vapor.
  • Previous research focused on vapor, not the actual e-liquid composition.

Purpose of the Study:

  • To investigate the presence of formaldehyde in commercially available e-liquid products.
  • To assess the chemical composition of e-liquids used in electronic cigarettes.

Main Methods:

  • Sixteen e-liquid products were procured for analysis.
  • The chromotropic acid method was employed to detect formaldehyde.
  • Analysis included both flavored and non-flavored e-liquids, as well as different device types.

Main Results:

  • Formaldehyde was detected in 4 out of 16 (25%) e-liquid samples.
  • Positive samples included two flavored and two non-flavored e-liquids.
  • All formaldehyde-positive e-liquids were found in pod-based or disposable electronic cigarette devices.

Conclusions:

  • E-liquids may contain undeclared toxic chemicals like formaldehyde.
  • The presence of formaldehyde in 25% of tested e-liquids highlights a significant public health concern.
  • Further research and stricter regulation of e-liquid products are essential.