Vegetable glycerin is a versatile ingredient used in a variety of products including food, pharmaceuticals, cosmetics and more. With proper storage, vegetable glycerin has an exceptionally long shelf life, but it can eventually expire if not stored properly. This article will examine how long vegetable glycerin lasts, the signs of expired vegetable glycerin, and how to properly store it to extend its shelf life.
What is Vegetable Glycerin?
Vegetable glycerin, also known as glycerol, is a clear, odorless liquid made from plant oils. It is created through hydrolysis, which splits fatty acids from the glycerol backbone of triglycerides found in plant oils. Vegetable glycerin has a sweet taste and is soluble in water and alcohol.
Some key properties and uses of vegetable glycerin include:
- Humectant – attracts moisture and hydrates skin
- Emollient – softens and smoothes skin
- Thickening agent – increases viscosity of liquids
- Sweetener – provides sweet taste with fewer calories than sugar
- Solvent – dissolves flavors and preservatives
How Long Does Vegetable Glycerin Last?
With proper storage away from heat and light, vegetable glycerin has an extremely long shelf life. Unopened, it can last 2-3 years from the manufacturing date. Once opened, vegetable glycerin can last 1-2 years.
Signs that vegetable glycerin may be expired include:
- Cloudy appearance
- Changed texture – thicker or runnier
- Strange odor
- Decreased effectiveness in recipes
Maximizing Shelf Life
To get the most out of your vegetable glycerin purchase, follow these tips for proper storage:
- Store in a cool, dark place away from heat and sunlight
- Make sure container is air-tight and sealed
- Do not store in humid environments
- Avoid extreme temperature fluctuations
- Transfer to smaller container to minimize air exposure after opening
Using Expired Vegetable Glycerin
Vegetable glycerin that has expired from age or improper storage can sometimes still be used for certain purposes. Here are some options if your vegetable glycerin has expired:
- Soap making – will still aid lubrication and bubbles
- Compost – valuable source of carbon
- Cleaning – works as a natural degreaser
- Craft projects – retains adhesive properties
However, expired vegetable glycerin should not be used for food, pharmaceuticals or personal care products. When in doubt, it’s best to replace your vegetable glycerin to ensure quality results.
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