Benzalkonium Chloride (BKC 80%) - alkyldimethylbenzylammonium Chloride (ADBAC) 80% - Made in USA (Size: 16 fl oz / 0.125 gln)

This is benzalkonium chloride and is a common ingredient found in modern merthiloate, cosmetic products, eye drops and antibacterial soaps. Typically, the concentration ranges from .1% in cosmetics intended to remain on the skin to .13% in hand sanitizers. In eye drops this concentration drops to .004% to .02%. It is a skin and tissue irritant and in higher concentrations, benzalkonium chloride must be rinsed off throughly after being applied to the skin. Achieving the desired final concentration is crucial for safety. I use this to make topical antiseptic sprays and to add antibacterial properties to liquid soap. Because this product is 80% concentrated, I use a small graduated syringe to accurately add the amount I need. It’s easier to work in metric units and convert percent to proportion. 16 ounces of liquid soap -> 473 ml Add 80% concentrated benzalkonium chloride -> .80 proportion Final concentration of .13% -> .0013 proportion Find out how much of that volume should be benzalkonium chloride to achieve the desired concentration: 473 ml x .0013 = .6149 ml Since what I’m adding is .80 concentrated, then I need to increase the added amount: .6149 ml / .80 = 0.7686 mL I rounded down for safety: .7 ml For 16 ounces of liquid soap I first removed .7 ml from the container. (It’s such a tiny amount but this demonstrates that you need to remove some of the final volume to achieve the correct concentration.) I poured 1/4 of the liquid soap into a large clean glass, then I added .7 ml of the 80% concentrated benzalkonium chloride to the glass. I stirred the liquid until it I was satisfied that it blended. I added 1/4 more of the soap and stirred. I added 1/4 more and stirred. I added the final 1/4 and stirred. I poured the contents back into the container and it’s ready. I also created a .5% (.005) concentrated water solution by adding 3 ml of the 80% concentrate to 470 ml of water in a 16 ounce spray bottle. I shook the bottle so there was no need to stir in a separate container.

I ordered this once and it seemed really tick and sticky straight out of the bottle. There was not a hazard sheet or mixing directions or ANYTHING included. Just the bottle. I sent a couple of messages to the supplier but they never sent me any directions. Zero help.