Alkaline substances include: sodium hydroxide NaOH, calcium hydroxide Ca(OH)2, potassium hydroxide KOH, barium hydroxide Ba(OH)2, ammonia water NH4OH, sodium carbonate Na2CO3, potassium carbonate K2CO3, etc.
Neutral ones are: sodium chloride NaCl, sodium sulfate Na2SO4, calcium chloride CaCl2, calcium sulfate CaSO4, potassium chloride KCl, sodium nitrate NaNO3, potassium nitrate KNO3, etc.