|I found an old bottle of diazanon that was never opened. Is there some DANGER in using the old chemical or would it ok, just old?
|As long as the product was in a sealed container you can use it. In fact, it?s best to use it up rather than dump it in the landfill. The chemicals lose effectiveness as they age but not to any great degree. I?d just dilute it according to label directions and use the product up.|