De or het colofonium?

The correct Dutch article is:

het colofonium

Rule Words ending in -um and -ium: usually het. See the rule
Meaning (Dutch) (muziek) vioolhars

How to use colofonium

the colofoniumhet colofonium
this colofoniumdit colofonium
that colofoniumdat colofonium
our colofoniumons colofonium
your colofoniumjouw colofonium
every colofoniumelk colofonium
which colofonium?welk colofonium?
a big colofonium / the big colofoniumeen groot colofonium, het grote colofonium

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).