noun
General term for a liquid that dissolves another substance; used in chemistry, industry, and everyday contexts.
この塗料は有機溶剤を含んでいる。
This paint contains an organic solvent.
溶剤を使って油汚れを落とす。
Use a solvent to remove oil stains.
noun
hot charge
Only when written 溶材
Metallurgical term for a molten material added to a furnace; restricted to the rare kanji form 溶材.
製鉄所では溶材を炉に投入する。
At the steel plant, they charge the furnace with hot charge.
Compound of 溶 (dissolve) and 剤 (agent, preparation). The variant 熔剤 uses 熔 (melt) and is less common.