B
barkranch
I am trying to determine if passivation chemicals expire. We were recently dinged in an audit because our procedure states to verify the shelf life has not expired for passivation solutions. I have performed extensive research trying to determine if nitric acid expires. One of the chemical companies we have purchased nitric acid from in the past provided us with a certificate of analysis which states the shelf life is 18 months. We have sense changed suppliers and our current supplier of nitric acid states there is not an expiration date. I realize that shelf life and expiration dates are two different things. Shelf life is for unopened product, expiration dates begin once the product is opened. Do other companies document their expiration dates for passivation solutions?
Any help is greatly appreciated!
Any help is greatly appreciated!