Shelf Life of Vitamin C E Ferulic Pre-Mix Kit and Brown Bottles

Regarding the shelf life of the Vitamin C E Ferulic Pre-Mix Kit components before mixing, the powder form of Vitamin C (Ascorbic Acid) generally has a longer shelf life when stored correctly in a cool, dark, and dry place, typically up to 2 years. The 6-month shelf life commonly refers to the stability of the product after the Vitamin C powder has been dissolved in the base liquid. Always check the expiry date printed on the packaging of both the base and the powder for the most accurate information.

Concerning the brown bottles sold by the company and their suitability for acidic Vitamin C solutions, while some plastic materials can withstand acidic conditions, we cannot confirm the specific material and acid resistance of all brown bottles without more details. For packaging acidic formulations like Vitamin C serums, it is crucial to use containers made from materials known to be compatible with acidic pH levels to prevent degradation of the packaging or the product.

Regarding reusing bottles after washing, it is generally not recommended for cosmetic packaging, especially for products like Vitamin C serums which can be sensitive to contamination. Proper sterilization of used containers, particularly pumps and droppers, is very difficult to achieve at home. Any residual bacteria or contaminants can lead to product spoilage, reducing its effectiveness and potentially causing skin irritation. For optimal product stability, safety, and hygiene, using new, clean packaging is always the preferred option.