Chemical compound often labeled "S"

• Only commonly ingested rock
• Salt, to scientists
• It's present in the sea's H2O
• Formula for "S"
• Condiment, to chemists
• Salt letters
• Great Salt Lake abundance, to a chemist
• Salt in chem class
• It dissolves in H2O

Wiktionary Word definitions in Wiktionary
n. sodium chloride#English; table salt.