How Should I Store Vegetable Glycerin (VG) and Propylene Glycol (PG)?

How Should I Store Vegetable Glycerin (VG) and Propylene Glycol (PG)?
How Should I Store Vegetable Glycerin (VG) and Propylene Glycol (PG)?
Proper storage of vegetable glycerin (VG) and propylene glycol (PG) is essential to maintain their quality, safety, and shelf life. Whether you’re using them for food, skincare, or general applications, storing them correctly ensures they remain effective and safe to use over time.

Storage Matters
Both VG and PG are stable compounds, but like many ingredients, they can degrade or become contaminated if exposed to the wrong conditions.
Improper storage can lead to:
  • Reduced purity
  • Changes in consistency
  • Contamination from air or moisture

Ideal Storage Conditions
To keep your VG and PG in the best condition:
Store in a cool, dry place
  • Room temperature (around 15–25°C) is ideal
  • Avoid excessive heat or freezing conditions
Keep away from direct sunlight
  • UV exposure can degrade quality over time

Keep Containers Sealed
Both VG and PG are hygroscopic, meaning they absorb moisture from the air.
 Always:
  • Keep bottles tightly sealed
  • Avoid leaving containers open for long periods
This helps prevent:
  • Water contamination
  • Changes in consistency

 Use Suitable Containers
  • Store in original containers where possible
  • Use airtight, food-safe containers if transferring
  • Avoid low-quality plastics that may degrade

What to Avoid
  • Storing near heat sources (radiators, ovens)
  • Leaving containers open
  • Exposure to humidity or damp environments

How Long Do VG and PG Last?
When stored correctly:
  • Vegetable glycerin can last up to 2 years or more
  • Propylene glycol has a similarly long shelf life
Always check manufacturer guidance where available.

Conclusion 
Proper storage is simple but important. By keeping your VG and PG sealed, cool, and away from sunlight, you can ensure they remain safe and effective for long-term use.