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Testing products that you’ve used for years
If I’ve used a formula that I created for years, do I need to specifically do a separate stability testing?
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7 Replies
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Typically, you’ll want to at least do microbial contamination testing on every batch just to ensure that it doesn’t get contaminated. Also, you should probably do a limited stability test every couple months on your batches to make sure that when you’ve changed lots of ingredients the product is still stable. You should also have a retain of every batch you make stored at Room Temperature just so you can verify that it remains stable and safe.
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If you’ve completed the stability series - hopefully though 3 years- not beyond change control.
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How large does the sample need to be? The products are expensive so I wanted to keep maybe a 10ml sample?
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Regardless the cost, the “observation-sample” should be the same size as the one you’re selling, and in the same type of packaging.
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How long do I have to keep the sample. At the moment I do not have a way to organize batch codes, if I wanted to begin that process, can I do so manually? I am not a large seller so I could feasibly just make up numbers and print labels to add to the products.
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The time you keep the sample should be equal to the shelf-life of your product.
No hard rules on labelling, manually is fine.
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Thank you so much!
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