Under section 46.05(a)(3) of the Texas Penal Code, it is a felony to possess, manufacture, transport, repair, or sell a “prohibited weapon,” including a chemical dispensing device.
Chemical dispensing device means
a device, other than a small chemical dispenser sold commercially for personal protection, that is designed, made, or adapted for the purpose of dispensing a substance capable of causing an adverse psychological or physiological effect on a human being.
It’s hard to think of any substance that is not “capable of causing an adverse psychological or physiological effect on a human being.” Even water or air, in sufficient quantities