fresh chemicals

Edward Meyers (aghalide@panix.com)
Sun, 08 Feb 1998 19:16:23 -0500 (EST)

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Would someone give me an idea of how long basic chemicals
last in the original jars, when opened and not opened. For
example: I have some metol in an unopened container for
about 15 years. Other chemicals, as well. Ed

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