Starting June 30, 2018
TSA will require extra screening and limit the size of powders in carry-on bags of travelers entering the U.S.
Passengers traveling to the United States from international destinations may be subject to additional screening if carrying powders. New security measures will limit the quantity of powder-like substances in the aircraft cabin.
For travelers flying to the U.S., any substance in powder form — f.ex. makeup, protein shake mix, spices, baby powder — will need to be packed in containers less than 12 ounces (350 ML). Larger amounts must be packed in checked baggage only. Powders in carry-on bags are also subject to a secondary search by the TSA. It is recommended that all powders be placed in checked baggage.
Baby formula, prescribed medication, and crematory containers are exempt.
Powders are defined as:
Fine dry particles produced by the grinding, crushing, or disintegration of a solid substance (for example, flour, sugar, ground coffee, spices, powdered milk, baby formula or cosmetics). Powders may also be presented in clumpy, grain, or compressed material forms.