Raw material expiry and preservatives
I have a problem that has been discussed across the forum previously and the posts have been very helpful. I have a lot of ingredients that have just passed the expiry date set by the supplier. I can only order high volumes at expensive freight so seem to have a lot of stuff that has expired or is about to. Anything that looks or smells bad I discard regardless of the expiry date.
I only formulate for myself with the occasional shampoo or body wash for friends who assume the risk!
I have just a couple of questions I’m hoping experienced formulators can assist with. I have a large amount of these ingredients that expired in June: SLeS, Cocoamide MEA,
Cetearyl alcohol, Stearic acid and SCI.
From what I have read in the forum, ideally I would be testing these products for safety but as a home crafter I don’t have the resources to do that. If there is no change in colour or odour then they are probably okay for personal use but I assume that risk. Mostly I use the SLeS, Cetearyl alcohol and Stearic acid. Is there anything in particular I should be wary of with these ingredients having just expired?
My other question is about preservation. I have read one suggestion to double the preservative. I usually use the maximum amount of preservative but have always thought that too much preservative is a bad thing. Do I double the maximum amount (when the recommended rate of liquid germall plus is 0.1 - 0.5%).
Many thanks in advance.
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