What chemical turns dark brown in sunlight?

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Offline Bige

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What chemical turns dark brown in sunlight?
« on: 19/06/2009 01:54:09 »
What chemical, when applied to a surface, will turn dark brown over a matter of hours in sunlight? I was thinking silver chloride but I might be wrong. Let me show you an example of the colors http://img41.imageshack.us/i/questionj.png/ . Thanks.
« Last Edit: 19/06/2009 01:55:47 by Bige »

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Offline Chemistry4me

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What chemical turns dark brown in sunlight?
« Reply #1 on: 19/06/2009 02:43:06 »
Yes, silver chloride.

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Offline Shadec

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What chemical turns dark brown in sunlight?
« Reply #2 on: 19/06/2009 08:28:16 »
well, all silver halides do, but AgCl is an example