Alcohol Spray Formulation: Precipitation Issue and Moisturizer Alternatives

ถามโดย: ying.nujareek เมื่อ: March 05, 2020 ประเภทผลิตภัณฑ์: เครื่องสำอาง

คำถาม

I am formulating a moisturizing alcohol spray with the following ingredients:

  • Ethyl Alcohol (95%)
  • Witch Hazel (Distilled - Alcohol Free, Paraben Free)
  • Double Hyaluron Liquid
  • Calendula Extract (Water Soluble)
  • MOIST24 (Glycereth-26)
  • Aloe Vera Extract (อัตราสกัด 10:1 FullAssay™)

When mixing, I observed white clumps/streaks with Double Hyaluron Liquid and significant cloudy precipitate with Aloe Vera Extract. I tested mixing each ingredient separately with alcohol and confirmed these two ingredients caused the issues.

Could you please recommend alternative moisturizing ingredients that are soluble in alcohol and do not cause precipitation? Thank you.

คำตอบ

Improving Alcohol Spray Formulation Clarity

You've encountered a common issue when formulating alcohol-based sprays: certain water-soluble ingredients, like Double Hyaluron Liquid and Aloe Vera Extract, can precipitate or cause turbidity in high concentrations of alcohol. This is because they are highly soluble in water but not in alcohol.

To create a clear, stable alcohol spray that still provides moisture, you need to replace the problematic ingredients with alternatives that are compatible with alcohol or hydro-alcoholic systems.

Based on ingredient properties, here are some moisturizing alternatives you can consider:

  • PPG-20 Methyl Glucose Ether: This ingredient is soluble in both water and alcohol and can help reduce the drying effect of alcohol on the skin.
  • Methylpropanediol: A humectant and solvent that dissolves in water and is compatible with alcohol bases, helping to boost moisture and ingredient absorption.
  • VersaMoist™ (PEG/PPG-14/7 Dimethyl Ether): Soluble in both water and oil, this ingredient can help blend components and provide hydration while reducing stickiness.
  • TransMoist™ (PPG-24-Glycereth-24): Similar to MOIST24, this humectant dissolves in water and can enhance the moisturizing feel and absorption of the spray.
  • Sorbitol Solution 70%: A humectant that may be compatible depending on the overall formula composition.

You can try substituting Double Hyaluron Liquid and Aloe Vera Extract with one or a blend of these ingredients. Your other ingredients like Witch Hazel and MOIST24 appear to be compatible with your alcohol base.

ผลิตภัณฑ์ที่เกี่ยวข้องที่กล่าวถึง

Aloe Vera Extract (extraction ratio 10:1 FullAssay™)
Aloe Vera Extract (extraction ratio 10:1 FullAssay™)
เครื่องสำอาง
Witch Hazel (Distillate - Alcohol Free, Paraben Free)
Witch Hazel (Distillate - Alcohol Free, Paraben Free)
เครื่องสำอาง
Double Hyaluron Liquid
Double Hyaluron Liquid
เครื่องสำอาง
Sorbitol Solution 70%
Sorbitol Solution 70%
เครื่องสำอาง
MOIST24
MOIST24
เครื่องสำอาง
VersaMoist™
VersaMoist™
เครื่องสำอาง
TransMoist™ (PPG-24-Glycereth-24)
TransMoist™ (PPG-24-Glycereth-24)
เครื่องสำอาง
Methylpropanediol
Methylpropanediol
เครื่องสำอาง
PPG-20 Methyl Glucose Ether
PPG-20 Methyl Glucose Ether
เครื่องสำอาง