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<p>[QUOTE=&quot;Ancientnoob, post: 1757759, member: 44140&quot;]Acids generally have no expiration. I would also assume the the concentration (strength) would be low enough where you would not have to worry about the hazard of caking. I would store them seperatly from other house hold chemicals just in case. Keep the bottles sealed tightly. If you notice the dropper getting stiff or cracking dispose with a large amount of water. Aaaaaaaaand when mixing with the water make sure you add the acid to the water and NOT the water to the acid.[/QUOTE]</p><p><br /></p>

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