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Note the appearance, odor, and color of each product.

If these appear normal, the product has probably recovered completely.

More information can be found on the product detail page for P4780: Detail/SIGMA/P4780 No.

Product P1754 is not tested for contaminating RNase and DNase activity.

You can contact any of our Customer Sales and Service offices to receive a quote.

USA customers: 1-800-325-3010 or view local office numbers.

When products have been exposed to very high or low temperatures, examine them carefully.

Click on the following link to search for a Certificate of Analysis. Autoclaving a solution of TWEEN 80 is generally not advised.

Please click the following link to see the details on our Product Dating Information. This and other information can be found on the Product Information Sheet, which can be accessed through the following link: Sterile filtration is more easily done if the liquid is warmed to about 40°C and alternate portions of hot distilled water and TWEEN 80 are poured through the 0.22 µm filter. No, P1754 is not cell culture tested, but product P4780 is cell culture tested TWEEN 80.

Some Mary Kay® products (e.g., Acne Treatment Gel) may have an expiration date because they have a shelf life of less than three years.

For these products, it is particularly important to check the expiration date before using them.

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