Related Clues:

• Substance with a low pH
• Beginning to a bad rain?
• Dripping with sarcasm
• Kind of rock or jazz
• Battery content
• Low-pH compound
• Test or rock lead-in
• Sulphuric, for one
• It has a pH below 7
• Rock type
• Sulfuric substance
• It was dropped at Woodstock
• Trip provider?
• Base's counterpart
• Digestive fluid