Chlorophyll Color Stability in Alcohol and Nano Silver Concentration
Question
I'm concerned about chlorophyll turning brown when used in a 50% alcohol solution for a cleaning product. Can it be added to 50% alcohol without the color turning brown and staying green, even at a light concentration? Also, the website doesn't specify the percentage needed for colloidal silver (Nano Silver 2000ppm, Colloidal, Yellow Solution) to equal 1% pure silver, and what is the recommended usage percentage?
Answer
Regarding the use of chlorophyll in a 50% alcohol solution:
The product "Sodium Copper Chlorophyllin Complex" (ID 7361) is a water-soluble pigment. The description indicates it should be mixed in the water phase of a formulation. While it is a stabilized form of chlorophyll, its stability specifically in a high concentration of alcohol like 50% is not mentioned in the product description. Natural chlorophyll can be unstable in alcohol and may change color (e.g., turn brownish) over time or with exposure to light. Although this product is a copper complex for better stability, it's possible that a 50% alcohol concentration could still affect its color stability. It would be advisable to test the stability in your specific 50% alcohol formulation to see if the desired green color is maintained without turning brown.
Regarding the concentration of colloidal silver:
The "Nano Silver (2000ppm, Colloidal, Yellow Solution)" product (ID 8135) has a concentration of 2000 parts per million (ppm). This is equivalent to 0.2% silver concentration (2000 ppm / 1,000,000 ppm = 0.002 = 0.2%).
To achieve a final concentration of 1% pure silver in your formulation using this 0.2% solution, you would theoretically need to use 500% of the solution in your formula (1% / 0.2% = 5). This is not practical for a formulation.
The product description recommends a usage rate of 1-5% (with 2% being recommended for most germ control purposes). Using 2% of the 2000ppm (0.2%) solution in your final product would result in a silver concentration of 40 ppm (2% of 2000 ppm = 0.02 * 2000 ppm = 40 ppm). This recommended usage rate is for its function as a germ killer.
In summary:
- Chlorophyll's stability in 50% alcohol is not guaranteed by the product description and should be tested.
- The 2000ppm colloidal silver solution is 0.2% silver. Achieving 1% pure silver in the final product using this solution is not feasible. The recommended usage rate for germ control is 1-5% (typically 2%), which provides 40ppm silver in the final product.
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