De acordo com o site da indústria Australian Tee Tree :
Why is tea tree oil classified as a dangerous good?
It has flammable properties, with a FLASH POINT (closed cup) under 60.5°C. According to the IATA DGR liquids having flash point less or equal to 60.5°C are classified as dangerous goods (Class 3).
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How may dangerous goods be transported by air?
They are not permitted in passengers' or crews' baggage.
Portanto, a resposta é no , você não pode transportar óleo de tea tree em sua bagagem de mão ou de check-in, pois é um líquido altamente inflamável.
Sites que vendem óleo da árvore do chá confirmam também:
NOTE: This low-flashpoint oil (136°F) will ship Ground Only, regardless of the shipping method you choose at checkout. It cannot ship outside the lower 48 U.S. states or USPS.