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Old ampersulf (ammonium persulphate) efficiency?

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LAN_403

Conundrum

Mon Feb 25 2008, 02:49PM

Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062

Hi all.

Found this in my chemicals cabinet. Its been there for about two years at least, is it likely to still etch?

The powder is RS Components anhydrous ammonium persulphate, and it worked when I used it last time.

Also have some light sensitive PCBs here, same problem.

Please advise, thanks. The powder *looks* OK however, no sign of clumping.

-A

Bored Chemist

Tue Feb 26 2008, 06:16PM

Registered Member #193 Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022

It's probably OK. I guess the best way to check is to try a solution of some with a piece of scrap board or even just some copper wire.

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