nitrate, saltpeter
硝 centers on chemical compounds containing nitrate, especially saltpeter, a naturally occurring mineral form.
硝 combines 石 (stone, mineral) with 肖, which likely contributes the sound ショウ. Together they indicate a mineral substance related to nitrate.
The left side 石 (stone) suggests a mineral, and the right side 肖 looks like a small flame or spark. Picture saltpeter crystals sparkling like tiny flames in the rock.
For ショウ, imagine a miner showing a sparkling piece of saltpeter: show -> ショウ, and the stone 石 reveals the nitrate mineral.
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nitric acid
nitrate
gunpowder smoke
Asahi Glass
ammonium nitrate
crown glass
Chile saltpeter; soda nitre
flint glass
nitrous acid
amyl nitrite
ammonium nitrite
potassium nitrite
sodium nitrite
nitrite
nitrite bacteria
dilute nitric acid
Flat Glass Association of Japan
bismuth subnitrate
nitrocalcite
gunpowder