Could you tell what packaging is best? Is it ok to store in a plastic bottle (it's an original package from the supplier, white, thick material which looks like some sort of plastic) wrapped in additional plastic foil?
Keep it in its original storage, I don't think there's any reason to change anything if the supplier sent it to you that way.
Plastic bottles are usually HDPE or sometimes PP. The markings should on the bottom. If there is a glued seal on the bottle under the cap, it will be enough to store it for a few years, if the cap itself has a seal. It is usually just a recess that sits tightly on the bottle. The plastic wrap does nothing unless it's a vacuum sealed bag. If you intend to keep it for a longer period of time, it would not hurt to transfer it to a hermetically sealed brown/amber glass bottle, filled up to a neck with no room for air. Some manufacturers ship their chemicals in temporary containers that are not meant for storage, as the labs/companies have their own specialized containers for everything.
