Glycerin, also known as glycerol, is a humectant and has an HLB (Hydrophilic-Lipophilic Balance) value of approximately 9.8.
This indicates that glycerin is more hydrophilic (water-loving) than lipophilic (oil-loving).
What is HLB?
HLB is a scale used to measure the balance between the hydrophilic and lipophilic properties of a surfactant. It ranges from 0 to 20.
- Low HLB values (0-3) indicate a more lipophilic surfactant.
- High HLB values (13-20) indicate a more hydrophilic surfactant.
Glycerin and HLB
Glycerin's high HLB value makes it a good emulsifier for oil-in-water (O/W) emulsions. This means that it can help to stabilize mixtures where oil droplets are dispersed in water.
Examples of Glycerin's Applications:
- Cosmetics: Glycerin is a common ingredient in lotions, creams, and soaps.
- Pharmaceuticals: It is used in many medications, including cough syrups and oral solutions.
- Food Industry: Glycerin is used as a humectant, sweetener, and thickener in food products.
Glycerin's high HLB value also makes it useful for other applications, such as:
- Solubilizing agents: Glycerin can help to dissolve substances that are not readily soluble in water.
- Moisturizers: Glycerin attracts water to the skin, helping to keep it hydrated.
