And this is precisely why you should demand pure sodium nitrite. There are many users of the pink stuff who have posted that it ruined the valuable meat they were trying to preserve. Get the good stuff, and if anybody you are trying to buy it from is stupid enough to ask you why, you tell them that you are sick and tired of having the shitty pink garbage ruin your perfectly good and prized rare venison.
Nobody should ever be stupid enough to do anything except go out of their way to accommodate you, but if you detect a scintilla of resistance, then it is your responsibility as the customer/boss to make them feel stupid for ever questioning anything about what you are ordering, or your vastly superior knowledge of experience on the subject and the product you are ordering.