That might be a good solution. I don't think XTOL is close to saturated, so I think it might work. Why don't you try mixing a 1L package in 1/5 the solution and see if it will dissolve. If it does, your only concern will be shelf life. I would think it's good for a few months at least, if you keep the oxidation to a minimum by storing it in several smaller, topped-off bottles, or use nitrogen or marbles to displace the air in your container.(posted 8221 days ago)