Table 1.

VCCs of focus emitted from Puff Bar^™.

#	Analyte	CAS #	Hazardous classification*	Irritant (Yes/no)*	Sensitizer (Yes/no)*	Carcinogen (Yes/no)**	Exposure limits (μg/m3)
1	2-butanone+ (methyl ethyl ketone)	1338-23-4	Flammable, Corrosive	Yes	No	No	REL: 1500 PEL: 5000
2	Acetone	67-64-1	Flammable	Yes	No	No	REL: 590000 PEL: 2400000
3	Acrolein	107-02-8	Flammable, Corrosive Acute Toxic, Environmental hazard	Yes	No	Yes, Group 2 A: Probably carcinogenic to human	REL: 250 PEL: 250
4	Acetaldehyde	75-07-0	Flammable, Health Hazard	Yes	Yes	Yes, Group 2B: Possibly carcinogenic to human	REL: NE PEL: 360000
5	Formaldehyde	50-00-0	Corrosive, Acute Toxic, Health hazard	Yes	Yes	Yes, Group 1: Carcinogenic to human	REL: 2 PEL: 921
6	Isovaleraldehyde	590-86-3	Flammable, Environmental hazard	Yes	Yes	No	REL: NE PEL: NE
7	o, m, p -Tolualdehyde	o-529-20-4 m-620-23-5 p-104-87-0	Corrosive, Toxic	Yes	No	No	REL: NE PEL: NE
8	Propionaldehyde (propanal)	123-38-6	Flammable	Yes	No	No	REL: NE PEL: NE

⁺Other than 2-butanone, rest of VCCs were analyzed in accordance with EPA method TO-11A, but standard stock solutions were prepared by Restek and Supelco. To prepare the 2-butanone standards, two aliquots of 2-butanone neat material were weighed separately and derivatized in an Acetonitrile/2,4-Dinitrophenylhydrazine (DNPH) solution. A dilution of both standards was then analyzed and agreed within 1.5%.

^*According to Globally Harmonized System (GHS) for classification and labeling of chemicals;

^**International Agency for Research on Cancer, NE – Not established

All the analytes (exception: o, m, p - Tolualdehyde) are toxic on inhalation, intraperitoneal, oral, and skin exposure. Results of o, m, p – Tolualdehyde are presented as total Tolualdehyde for simplicity.

REL – recommended exposure limit; PEL – permissible exposure limit