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How is Bacteriostatic Water (BAC) shipped

Signs of bacterial contamination: Cloudiness (should be clear) Particles or floating material Unusual odor Color change Physical degradation signs Visual changes indicating degradation: Clear solution becomes cloudy Color change (especially copper peptides) Precipitation or crystals forming Separation of layers When in doubt: Discard

Avoid applying strong vitamin C products, high-concentration retinoids, or low-pH chemical exfoliants at the same time as AHK-Cu