TABLE 1.

Description of commercially purchased concentrated E-liquid flavoring.

Concentrated flavor	Date purchased	Lot Number	Production or expiration date	Primary diluent	Other ingredients	Comparative coloring	Absorbance reading at 595 nm∧
Tobacco	3/30/2019 8/23/2019	L44929# L44929*	NA NA	Propylene Glycol	Natural flavoring, water	Clear	0.043# 0.038*
Menthol	3/30/2019 8/23/2019	192301# 192006*	NA NA	Propylene Glycol	Natural and artificial flavoring	Clear	0.043# 0.039*
Cinnamon	3/30/2019 8/23/2019	CA192005# 93369283*	NA NA	Propylene Glycol	Natural and artificial flavoring, water	Clear Amber	0.152# 0.086*
Strawberry	3/30/2019 8/23/2019	190201# 190905*	NA NA	Propylene Glycol	Natural and artificial flavoring	Clear	0.043# 0.039*
Blueberry	3/30/2019 8/23/2019	181812# 190104*	NA NA	Propylene Glycol	Natural and artificial flavoring	Clear	0.044# 0.039*

# = used in Cuadra Lab; * = used in Palazzolo Lab; NA = not available.∧ = absorbance reading taken of 200 μL of concentrated flavoring in a 96 well plate.