The list of carry-on limits airline passengers can carry in their cabin baggage on international flights — which currently includes liquids, gels, aerosols and creams — will soon include powdered material, the Transportation Security Administration has announced.
The limit on powders to 350 millilitres, or roughly 12 ounces, the size of a can of soda, has been enforced, and beginning June 30, international screeners will have to adopt the limits on powders for fliers coming into the United States.
“These measures are part of T.S.A.’s efforts to stay ahead of threats, keep passengers safe and constantly increase capabilities through a layered approach to security,” Mike England, a spokesman for the agency, wrote in an email.
He identified powders including fentanyl and pepper powder “that could be used to irritate or harm aircraft passengers and aircrew if released during flight.”
In addition to powders that can be used as weapons, the agency is concerned with materials that may be carried on board and used to make an explosive in flight.
“Improvised Explosive Devices still pose the greatest threat to commercial aviation,” Mr. England wrote.
To avoid extra scrutiny, anyone travelling with more than 12 ounces of powder, which could include makeup, baby-related products, food, and other substances, should put the powder in a checked bag.
The new rules may also affect parents carrying infant gear including containers of baby powder or powdered formula.