Old photo chemicals

A friend of a friend gave me a box full of old photoprocessing chemicals. One of the bottles is "Elon Developing Agent," which Kodak tells me is Metol. I described the bottle to them (glass, with a metal cap) and they told me that it was old, as the newer chemicals are in plastic bottles. The powder inside isn't caked or hard, and they couldn't say whether it was still good to use. I would like to mix a batch of D-23 with this. Does anybody know if it's still good? Thanks.

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