| Items and materials that may be commonplace and | | | | Infectious materials. Medical laboratory specimens, |
| necessary at home or in the workplace are | | | | viral organisms, bacterial cultures. |
| sometimes banned inside aircrafts because of the | | | | Corrosives. Drain cleaners, car batteries, wet cell |
| dangers they pose to both passengers and crew. It | | | | batteries, acids, alkalis, lye, mercury. |
| therefore becomes important to check with the | | | | Organics. Fiberglass resins, peroxides. |
| airline which items they allow as carry-on luggage or | | | | Radioactive materials. Smoke detectors, radioactive |
| as checked baggage, or banned altogether. | | | | pharmaceuticals, and other radioactive materials. |
| The following are the categories of items proscribed | | | | Dry ice (frozen carbon dioxide). Up to four pounds |
| by the Transport Security Administration from being | | | | (1.8 kg) is allowed on board for packing perishables, |
| boarded in aircraft cabins: | | | | providing that the package is vented. |
| Explosives and firearms. Matches, sparklers, other | | | | Magnetic materials. Strong magnets such as those in |
| fireworks, flares, gunpowder, ammunition or other | | | | loudspeakers and laboratory equipment. |
| ordnance, blasting caps, dynamite, loaded firearms. | | | | Other items. Wet-cell batteries, chemical oxygen |
| Other weapons. Knives of any kind, throwing stars, | | | | generators (used or unused) or any equipment |
| swords, or other items used in martial arts | | | | containing fuel or other flammable liquids. |
| competitions. Rules in other countries will differ on | | | | In light of 9/11, TSA also began regulating the |
| transporting knives and other weapons. | | | | carriage of the following items on board |
| Gases and pressure containers. Flammable aerosols | | | | aircrafts:sition, including carpet knives and box cutters |
| like hair spray, spray paint or insect repellant; carbon | | | | (and spare blades), any device with a folding or |
| dioxide cartridges, oxygen tanks (scuba or medical), | | | | retractable blade, ice picks, straight razors, and metal |
| mace, tear gas, pepper spray, self-inflating rafts, and | | | | scissors with pointed tips. |
| deeply refrigerated gases such as liquid nitrogen. | | | | Corkscrews. |
| Flammable liquids and solids. Gasoline, propane, butane | | | | Lighters, lighter fluid, and strike-anywhere matches. |
| and other fuels, lights with flammable reservoirs, | | | | However, up to four books of safety matches are |
| matches, flammable paints, paint thinners, some | | | | allowable. |
| cleaning solvents, some adhesives, cigarette lighters, | | | | Baseball and softball bats. |
| and lighter fluid. Personal care items such as | | | | Golf clubs. |
| flammable perfume and such may be carried on | | | | Pool cues. |
| board in limited quantities. | | | | Ski poles. |
| Oxidizers and organic peroxides. Bleach, nitric acid, | | | | Hockey sticks. |
| fertilizers, swimming pool or spa chemicals, and | | | | What is allowed and what is not allowed varies |
| fiberglass repair kits. | | | | among airline companies. Just to be sure, always |
| Poisons. Weed killers, pesticides rodent poisons, | | | | check with the air carrier as to what kind of baggage |
| arsenic and cyanides. | | | | they allow before booking. |