It is not stated what the "harmful material" was but if there was no sexual conact between you and the minor, I doubt it, unless you fall under some special provision of your particular state's law.
A material that can be harmful if not properly disposed of is hazardous.
Pollution
hazardous waste
penises
overcrowding
Pollutant
pollution
vomiting
sulphide acid and hydrogen sulfate are harmful materials that can harm a metal.
Conditions that make material harmful is that when it is used for harming/destroying/killing/polluting the environment and the people.
virus is a non cellular it require to reproduce the materials of their host cell and they have those material on their structure which is harmful for the host cell.
Only if it is burning.