坐飞机可以带 泡打粉与小苏打 吗？（美国TSA/加拿大CATSA标准）

有限制允许：容器容量超过350毫升（12盎司）的粉末物品在安检时须单独置于托盘中接受X光与开盖抽检。

允许托运：托运行李中对粉末无数量限制，大包装粉末建议放入托运行李以加快安检速度。

Limited to what fits inside a single 1-quart (1-liter) transparent resealable bag in carry-on.

Standard toiletries and liquids conforming to the 3-1-1 rule (containers under 3.4 ounces / 100 ml inside a clear quart bag) require no separate declaration. You simply place the bag in a screening bin. Medically necessary liquids exceeding 3.4 ounces must be verbally declared to checkpoint screeners before inspection.

If liquid containers exceeding 3.4 ounces (100 ml) are detected in carry-on baggage without an infant or medical exemption, screeners will not allow them past security. Travelers must surrender the item for destruction, return outside security to place it in checked luggage, or mail it home.

CATSA: Restricted — containers over 350 ml (12 oz) must be screened separately. In checked bags: Yes — allowed in checked baggage with proper packaging.