Can you take bath salts on a plane? Rules by country

Bath salts on flights in and from Japan

The rule for bath salts comes from the Civil Aviation Bureau's list of restricted items. On international flights its liquids list applies as well.

Bath salts and bath oil: carry-on and checked baggage in Japan
Where	Allowed?	What applies
In the cabin	Yes, within limits	Yes. Bath salts and bath oil are listed with toiletries: 0.5 litres or 0.5kg per container, 2 litres or 2kg per person. On international flights bath oil is a liquid, 100ml or less in carry-on; granular and powdered bath salts are not.
In checked baggage	Conditions	Yes, within the 0.5 litre or 0.5kg per container and 2 litre or 2kg per person limits.

Bath salts, tablets and bath oil: powder, solid or liquid

Bath products range from loose salts to oils, and the liquid rule reaches only the liquid and gel kinds.

Bubble bath is in, granules are out: The English edition of Japan's liquids list words its row as Bath oil for jacuzzi, with a note that excepts granular and powdered types. The Japanese edition shows what the row means: bath additives such as bubble bath, in liquid or gel form, are restricted, and granular and powdered ones are excepted. A sachet of bath salts or bath powder is outside the liquid rule on that wording.
Tablets and bath bombs are not mentioned: Neither edition of the list names solid bath tablets or bath bombs. Its general test is in the opening notes: besides liquids, gels and aerosols, the restriction takes in whatever cannot keep its shape without a container. The list that sets quantities simply names bath additives and bath oil together in its cosmetics table, so the toiletry limits apply to every form.
Australia measures the container, not the powder: Australia is the place in these sources where a powder itself is limited. Its security page counts the total container volume of inorganic powders and says you cannot tip powder out to get under the 350 mL threshold. Salt and salt scrub are among its examples of inorganic powders, while Epsom salt is listed with the organic powders that are not restricted.

Bath salts: the rule country by country

The carry-on answer for bath salts is the same in all 3 other places we checked. The limits themselves are not identical, so read the row for the country you fly from.

Bath salts and bath oil: carry-on and checked baggage rules by country
Flying from	Carry-on	Checked bag	What the authority says
JapanCivil Aviation Bureau	With limits	With limits	Bath salts and bath oil are listed with toiletries: 0.5 litres or 0.5kg per container, 2 litres or 2kg per person. Source
United KingdomUK Government	With limits	Yes	Bath oil counts as a liquid (toiletries, including oils): at most airports containers larger than 100ml cannot go through security; some may allow up to 2 litres. Powders can obstruct x-ray images, so bags may be checked by hand. Source
TaiwanCivil Aviation Administration	With limits	Yes	Bath oil counts as a liquid. On international flights each carry-on container must be 100 ml or less, in one resealable clear bag of up to 1 litre. Larger containers go in checked baggage. Domestic flights have no such limit. Source
AustraliaHome Affairs, CASA	With limits	Yes	On international flights inorganic powders such as salt are limited to 350 mL or 350 g in total per person in carry-on; Epsom salt is listed as an organic powder with no limit. Not applied to checked baggage or most domestic flights. Source

Each row comes from that authority's own page. Airlines can be stricter, and the screening officer has the final say.

If security in Japan will not let bath salts through

What to do: Move bath salts to the bag you check in before you reach security, within the checked-baggage limits above. Narita Airport states that anything given up at the checkpoint is discarded and cannot be returned.

Buying bath salts in Japan

Where to buy: Drugstores and supermarkets. Bath salts are a popular souvenir.

Frequently asked questions

Can you take bath salts on a plane?

On flights in and from Japan: Yes. Bath salts and bath oil are listed with toiletries: 0.5 litres or 0.5kg per container, 2 litres or 2kg per person. On international flights bath oil is a liquid, 100ml or less in carry-on; granular and powdered bath salts are not. In checked baggage: Yes, within the 0.5 litre or 0.5kg per container and 2 litre or 2kg per person limits.

Do bath salts count as a liquid at airport security?

No, not the granular or powdered kind on flights from Japan. Japan's liquids list restricts bath oil and other liquid or gel bath additives and excepts granular and powdered ones. GOV.UK deals with powders apart from liquids: it says they may block the x-ray image and lead to a manual check of the bag.

Can I take bath salts from Japan to Australia in my carry-on?

Only within Australia's powder limit, if they count as an inorganic powder such as salt. Australia applies its restrictions to an inbound flight at the last point of departure, possibly at the boarding gate. Inorganic powders must be in containers of 350 mL or 350 g or less, with the same total per person. Epsom salt is on its list of organic powders, which are not restricted.

Can you put bath salts in checked luggage?

Yes, within the 0.5 litre or 0.5kg per container and 2 litre or 2kg per person limits.

Related items

Sources for this page

Japan Civil Aviation Bureau (MLIT) — Items restricted in carry-on and checked baggage (updated 24 April 2026)checked October 2, 2026
Japan Civil Aviation Bureau — List and Description of LAGs Restriction (1 October 2015)checked October 2, 2026
Japan Civil Aviation Bureau — List of liquids covered by the quantity limits (Japanese, 1 October 2015)checked October 2, 2026
GOV.UK — Hand luggage restrictions: Liquidschecked October 1, 2026
Taiwan CAA — Q&A on the new security measures for carry-on baggage (liquids, gels and aerosols)checked October 1, 2026
Australian Department of Home Affairs — TravelSECURE: What you can and can't bringchecked October 1, 2026
GOV.UK — Hand luggage restrictions at UK airportschecked October 1, 2026