Welcome to the home of SwiftCraftyMonkey Formulating Inc.! Join Susan as she obsesses about cosmetic chemistry and other things (some possibly related to monkeys)! Here you’ll find over 5,000 posts and formulas written over the past 16 years for everything from lotions, creams, and body butters to hair care products to fancy facial products filled with actives and cosmeceuticals! Enjoy the site without distractions – no ads, pop ups, sponsored posts, affiliate links, “one weird tricks” – all supported by readers like you.
Caroline posed an interesting question…My question is if I use a certain percentage of presevative how long will my product last? How long will it be protected? Is there a timeline? Great question! How do we figure out how long something will last? Preservatives and anti-oxidants are only one part of the equation. We...
Citric acid (or 2-hydroxy-1, 2, 3-propanetricarboxylic acid) is a chelating, anti-oxidizing, and pH altering ingredient that can bind metal ions, help prevent rancidity, and alter the pH of our lotions and surfactant mixtures. It’s also a key ingredient in bath bombs. There are two types of citric acid we can buy – anhydrous (water free)...
Let’s take a look at including EDTA in a lotion formula…The disodium EDTA I have from the Personal Formulator recommends usage at 0.1%, so I’ll use that as my number.A THICKER FOOT CREAM RECIPE (originally in this post…)WATER PHASE59.9% water3% glycerin0.1% disodium EDTA OIL PHASE15% oils – olive and rice bran are great choices here...
EDTA (or ethylenediaminetetra acetic acid) is a wonderful polyamino carboxylic acid that has the ability to chelate, sequester, and offer anti-oxidizing properties to our lotions. And we only need to use 0.20% to get maximum benefits in our lotions and surfactant based products! What exactly is a chelating or sequestering ingredient? EDTA binds with metal...
Anti-oxidants can stave off rancidity in our oils, giving them a longer shelf life in our products. Nothing can make the possibility of rancidity go away completely, but anti-oxidants are huge weapons in our fight on ickiness! Free radicals are constantly running around in our lotions, seeking out electrons to fill its valence shell. When...