SWIM is interested in shelf life of home made NaEtSO
4, when stored in a tightly sealed glass container. He doesn't want it to go bad, because he is not planning to turn it to nitroethane immediately. NaEtSO
4 was prepared by the method described by Bandil in
Post 251119
(Bandil: "Nitroethane ala Antoncho succes", Novel Discourse).