Silver nitrate stain removal:

Question:

Any suggestions about how to remove silver nitrate stains from benches?

Answer:

1. I’ve had good results with a 0.25M solution of sodium thiosulfate but it must be used before the silver nitrate dries.
2. Try Gumption cleaner.
3. Ammonia solution as soon as possible has some effect. Its best if you get students to use the silver nitrate over a tray, newspaper or other bench protection.
4. Bleach actually works really well if you let it sit on the stain for a while.

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