I am going to take a flight for some "working holidays". I'm expected to carry some alcohol (95%) and formol in order to do some field work at my destination. I'd probably take 1L of alcohol and 0,5L of formol with me. The usual practice here is to not declare it but just hope that it will pass with the main luggage. It is a domestic flight in Chile. I have no option to obtain these substances at my destination.
Is the transport of these substances illegal (officially prohibited)?
What would be the worst case scenario if detected and disapproved of (it would be OK to leave the substances but I cannot loose the flight)?
Would it help to have a signed letter from my supervisor stating the purpose of the chemicals?
Does anyone have any experience transporting these substances?