De or het researchlaboratorium?

The correct Dutch article is:

het researchlaboratorium

Rule Words ending in -um and -ium: usually het. See the rule

How to use researchlaboratorium

the researchlaboratoriumhet researchlaboratorium
this researchlaboratoriumdit researchlaboratorium
that researchlaboratoriumdat researchlaboratorium
our researchlaboratoriumons researchlaboratorium
your researchlaboratoriumjouw researchlaboratorium
every researchlaboratoriumelk researchlaboratorium
which researchlaboratorium?welk researchlaboratorium?
a big researchlaboratorium / the big researchlaboratoriumeen groot researchlaboratorium, het grote researchlaboratorium