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Leachables and Extractables in E-liquid Bottles and Closed ENDS Products

Principal Investigators: Jenna DuMond and Margaret Schmerier

Funding Mechanism: Research Contract

ID number: HHSF223201820229A

Award Date: 8/14/2018

Institution: EAG


Electronic nicotine delivery system (ENDS) products can be defined as having a closed-ENDS or open-ENDS design. In closed-ENDS products, e-liquid is contained in a non-refillable reservoir; in open-ENDS products, e-liquid is contained in a refillable reservoir, and may include e-liquid drip tip devices designed to allow individual drops of liquids, waxes, or tobacco to be placed on the atomizing element.  E-liquids are commonly packaged in plastic containers manufactured from a variety of polymers, co-polymers, plasticizers, colors, and other additives that may migrate or leach into the e-liquid.  The goal of this study is to develop and validate a controlled extraction method to measure extractable compounds from low density polyethylene (LDPE) and polyethylene terephthalate (PET) plastic bottles with a plastic dropper and/or rubber stopper, closed ENDS devices, and e-liquid drip tips.  If any of the extractables exceed the determined safety threshold, researchers will conduct a study to identify leachable compounds using the e-liquid constituents solvents propylene glycol and vegetable glycerin at various ratios, and a long-term (shelf-life) study of final packaging.  Findings will provide new information about the harmful compounds that may leach into e-liquid. 

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