shelf life of Alnochromix

Q: Is the date on the Alnochromix packet a use by date, or an expiration?  What is the shelf life of Alnochromix in diluted form?  How long is it good for?

A: The dates on the packets of Alnochromix® Oxidizing acid additive are indeed an expiration date.  We do not have data supporting use beyond that date.
The shelf life of Alnochromix solution depends….