The short version: research-use designation is a labelling convention, not a legal exemption, and it does not travel across borders.
Some jurisdictions provide a limited personal-importation allowance for medicines, usually bounded by quantity, by a supply period and by a requirement that the substance is for the importer's own use. Others provide none.
It helps to be literal here: the authority that matters is the national medicines regulator plus the customs authority, and both usually publish their position in plain language on their own websites.
Nothing here is medical advice, and research-use compounds are not approved for human use in any jurisdiction.
If the stakes are material, ask a lawyer where you live rather than a forum anywhere.
6Worth flagging that the declared value and the declared description are assessed separately. – gradient_slope 9 days ago 7Small correction: a liquefied pack on arrival tells you about the last day, not about the whole lane. – fibre_or_fragment 2 months ago add a comment