GLUCONO DELTA LACTONE (GDL).

Glucono Delta Lactone (GDL) is a polyhydroxy acid (PHA) and a type of chelator commonly used in cosmetics to help boost preservatives.  GDL is naturally found in things like honey and fruit juices, or fermented products like wine and kombucha. However, industrial forms are typically sourced from gluten-free rice or corn.

What makes it an appealing natural option for preservation-boosting is that GDL is an oxidized derivative of glucose and  Like other PHA’s, GDL is an antioxidant, meaning it seeks out free radicals and is especially beneficial for maturing skin. Chelating agents bind up trace metal ion contaminants in your water-containing cosmetic, thus keeping the product microbe-free for longer. They are not preservatives in their own right, they just help to kill microbes by starving them.

In cosmetics it acts not only as a preservative booster, but it can function as a pH adjuster or moisturizer. It functions as a moisturizer because the multiple hydroxyl groups attract water. In the same way it attracts water, this reduces the water available for microbial growth which is why, in part, it seems to function as a preservative.

In addition to moisturizing and the benefits of antioxidants, GDL can smooth skin and diminish the appearance of aging. Use it in both aqueous and anhydrous products, and also emulsions. Its main form is a white crystal powder, essentially odorless and soluble in water and alcohol.

ADDITIONAL SPECIFICATIONS:

INCI: Glucono Delta Lactone or Gluconolactone 

CAS NO: 90-80-2

STABLE IN PH RANGE: 3.8-5.5

APPEARANCE: White crystalline

STABLE IN PH RANGE: 3.8-5.5.

SOLUBILITY: Water, 1,3 propanediol, Propylene glycol, glycerin.

USAGE RATE: 0.1% –5%.

COMPATIBILITY:GDL is most frequently used in combination with Lactobionic Acid in a 3:7 or 4:8 ratio (3% gluconolactone/7% lactobionic acid).
It works as a chelating agent for Sodium Ascorbyl Phosphate (SAP). It works well in synergy with Vitamin C in illuminating products and replenishing creams, where SAP stimulates the production of collagen and gluconolactone stimulates the production of Hyaluronic acid.
Together with SAP, or alternatively with Arginine, it can be used as a pH regulator.
A 2% of Gluconolactone in products containing Urea will help inhibit a rise of pH over time.
Gluconolactone enhances the preserving properties of Sodium Benzoate and Potassium Sorbate
In exfoliating products up to 12%, Gluconolactone works well with Vitamin A and Vitamin E (or A&E Liposomes in aqueous gels).

Applications: effectively used in haircare, skincare, personal care such as bath products such as  body washes, shower gels, body lotions, creams, shampoos, liquid wash.

Formulation Tips: This product can easily be incorporated into water phase.