So you mean that while they were in what we would intake into our systems, there is no danger in the second hand vapor to others?
"No Danger" is a bit overreaching because additional testing is needed, but as Dr. Seigel put it, "There is no reasonable concern." The FDA did not test the vapor exhaled by a person, but rather simulated the operation of the e-cigarette.
Although I won't go so far as to say there is
no danger, there is no reason to expect "secondhand vapor" to be any more dangerous than the exhaled breath of a person using Nicorette Gum or the Commit lozenge.
Weren't the trace amounts of carcinogens only found in 1 of the samples the FDA tested? Think I read somewhere that there were questions about possible contamination causing the reading.
Keep in mind the difference between carcinogens (things that have been known to cause cancer) and toxins (things that can make you sick).
Some TSNA's are known to be carcinogenic, but the type and amount of TSNA's found in e-cigarette cartridges is comparable to the levels in FDA Approved NRT's.
I would presume it is because the vaporization process mixes less than a drop (.05ml) of
e-liquid into several liters of air that the TSNA's were below the threshold of detection so it is possible that they are not eliminated, but all reason for concern should be.
Quote from the FDA's Evaluation of e-cigarettes:
HSGC-MS analysis was conducted at 60°C to simulate the temperature that would be encountered during activation of an e-cigarette. Nicotine was detected in both products for all cartridges containing low, medium and high levels of nicotine but was not observed in cartridges identified as containing no nicotine. Screening for the possible tobacco specific impurities cotinine, nicotine-N-oxide, nornicotine, anabasine and myosmine was negative. β-Nicotyrine was detected in all Njoy cartridges but was not detected in the Smoking Everywhere cartridges.
Some of the above carcinogens were
detected in testing of several of the whole cartridge, and approximately 1% DEG was found in just one cartridge (SE's 555 High--which was no longer available for sale by the time the report was published). DEG is the "toxic ingredient in antifreeze" often bandied about, while Propylene Glycol actually used in antifreeze to make it
non-toxic.
One or more TSNA's were found in all of the cartridges (except those advertised as containing no nicotine), DEG was found in just the one.
Neither was detected in the actual vapor.