Although it is laudable to believe that as long as you are doing nothing illegal you should be safe from the law, the reality can be very different. I assume that you are apprehensive because you know this to be true. What should be and what is are two different concepts.
The reality is that there are several layers of laws, all of which could effect you. There is international, federal (USA), state, and local. I doubt any one person on this list would know what your circumstances. A state may for instance deem it illegal to have too many Erlemyer flasks to be illegal without having a permit, while you can have all the guns you want. Even localities can restrict having certain chemicals based on zoning laws.
Although you may be in the right, these governing groups can effectively prevent you from having items just by keeping you in litigation and you can not afford all the legal fees.
There are countless laws on the books, which seem silly but they still exist. You can Google “silly laws”. Enforcement of said laws are at the whim of the local police forces.
There is a common understanding that police groups like the DEA and ATF routinely gather information on people who by chemicals that they deem to send up a red flag.
You are at the luck of the draw as to whether or not you will be taken in by the law for doing science. There is a guy who was or is in legal trouble for growing bacteria in petri dishes and putting it up as a work of art.
Having said all this, many people forge on and do their thing practicing citizen science. They are just taking their chances.