Login
THDA (Oil-Soluble, Vitamin C)

THDA (Oil-Soluble, Vitamin C)

Price range: $13.75 through $133.00 USD

INCI: Tetrahexyldecyl Ascorbate

Tetrahexyldecyl Ascorbate (THDA) is an advanced, oil-soluble vitamin C derivative prized for its exceptional stability, penetration, and clinical performance. Unlike L-ascorbic acid, which is notoriously unstable and prone to oxidation, THDA remains highly stable in formulations and effectively delivers potent vitamin C benefits deep into the skin. Clinically demonstrated to produce similar brightening, firming, and antioxidant results to L-ascorbic acid—without its formulation challenges—THDA offers formulators a superior pathway to creating high-performance, next-generation skincare.

THDA helps reduce hyperpigmentation, brighten dull skin, stimulate collagen production, and defend against environmental stressors. Its oil-soluble nature allows for excellent compatibility with facial oils, emulsions, serums, and anhydrous formulations, making it an ideal choice for luxury skincare brands seeking a premium, high-efficacy vitamin C ingredient.

  • Highly stable, oil-soluble form of vitamin C

  • Clinically shown to deliver results comparable to L-ascorbic acid

  • Brightens uneven skin tone and reduces the appearance of dark spots

  • Supports collagen production for improved firmness and elasticity

  • Potent antioxidant that helps protect against environmental damage

  • Less irritating and more skin-compatible than pure ascorbic acid

  • Ideal for premium serums, face oils, emulsions, and anhydrous systems

     


    Clinical Data 
  • Approved as a quasi-drug in Korea at 2%, and in Japan at 3%
  • Approved as a functional ingredient for whitening at 2% in Korea

  • Solubility: Oil-soluble

  • Phase: Add during the cool-down or oil phase

  • Usage Rate: Typically 1–3% up to a maximum of 10%, depending on application

  • pH Range: Compatible across a wide range due to high stability, but recommended to maintain a final ph of between 3 to 6.

  • Should be added into the oil phase of formulations at temperatures below 80°C (176°F)

  • Compatibility: Excellent in oils, emulsions, balms, anhydrous serums, luxury actives

  • Brightening serums

  • Anti-aging facial oils

  • Vitamin C creams and emulsions

  • Luxury anhydrous serums

  • Hyperpigmentation-targeted treatments

  • Daily antioxidant solutions

Safety data sheet
COA
Safety data sheet
COA
Safety data sheet
COA

INCI: Tetrahexyldecyl Ascorbate

Use: 0.5 – 3.0% ≤ 10%

Solubility: Lipophilic (oil-soluble)

Customers also purchased...

Related products

  • New in the shop, plant seed oils to delight
The skinification of hair and scalp has evolved into a self care ritual of the whole body that delights the senses.
Explore more
Scroll to Top