Okay, the user wants me to translate "mercury sulfide" into Thai. Let me check if it's already in Thai. No, it's in English. So I need to translate it.
First, "mercury" in Thai is ปรอท. Then "sulfide" is ซัลไฟด์. So combining them, it should be ปรอทซัลไฟด์. Let me confirm if that's the correct term. Yes, in chemical contexts, "sulfide" is commonly translated as ซัลไฟด์. So the translation should be correct.