Tetrahexyldecyl Ascorbate (THD) Oil
Stable, oil-soluble Vitamin C for luxury anti-aging serums, skin-brightening creams, and DIY skincare formulas.
CA$20.00
Tetrahexyldecyl Ascorbate (often called THD Ascorbate or THDA) is a highly stable, oil-soluble ester of Vitamin C. Unlike traditional L-ascorbic acid, which is water-soluble and notoriously unstable, THD Ascorbate is highly resistant to oxidation from air, light, and heat.
Because it is oil-soluble, it penetrates the skin's moisture barrier much deeper than traditional L-ascorbic acid. It then converts into pure vitamin C inside the deeper layers of the epidermis to trigger collagen synthesis, reduce dark spots, deliver powerful anti-aging, skin-brightening, antioxidant benefits and offer powerful cellular protection without causing irritation. It is the gold standard Vitamin C choice for luxury face oils, premium waterless serums, anti-aging creams, and sun care products.
Key Benefits & Functions:
Deep Lipid Penetration: Excellent lipid solubility allows it to penetrate the epidermis far more efficiently than water-soluble Vitamin C forms.
Exceptional Stability: Highly stable configuration prevents premature oxidation and discoloration, giving your formulas a long shelf life.
Advanced Brightening: Helps fade the appearance of dark spots, evens out skin tone, and targets hyperpigmentation.
Collagen Support: Promotes skin elasticity and firmness, visibly reducing the appearance of fine lines and wrinkles.
Technical Specifications:
INCI Name: Tetrahexyldecyl Ascorbate
Chemical Name: Tetrakis(2-hexyldecyl) ascorbate
CAS Number: 183476-82-6
EC / EINECS Number: 430-110-8
Purity / Assay: 98% pure active material.
Appearance: Clear, pale yellow to colorless, free-flowing oily liquid.
Odour: Odorless to very Faint, characteristic mild scent.
Stability: Exceptional resistance to oxidation, heat, and discoloration. Unlike L-ascorbic acid, it will not turn your formulations brown or rapidly degrade when exposed to air.
Solubility & Compatibility:
Solubility: Completely soluble in cosmetic oils, lipids, esters, and silicone bases. Insoluble in water.
Compatibility: Synergizes perfectly with oil-soluble antioxidants like Vitamin E (Tocopheryl Acetate) and Ferulic Acid to maximize free-radical protection. It pairs smoothly with Niacinamide and Retinol for high-performance brightening regimes.
Common Usages & Applications:
Luxury Face Oils & Serums: Acts as the primary active ingredient in premium anhydrous, glowing facial elixirs.
Brightening Creams: Targeted treatments for hyperpigmentation, age spots, and uneven skin tone.
Anti-Aging Lotions: Daily moisturizers and eye creams designed to reduce fine lines and support skin elasticity.
Sun Care & After-Sun: Reverses and defends cells from UV-induced free radical damage.
Recommended Usage Percentages:
Typically formulated between 0.5% to 10.0%.
0.1% to1%: General antioxidant protection and minor brightening support
0.5% – 2%: Daily Moisturizers, Lotions, & Eye Creams
2% – 5%: Daily hyperpigmentation repair and anti-aging benefits
5% – 10%: Professional, high-potency clinical treatment serums
Formulation & Blending Guide:
Oil-Phase Compatibility: Completely soluble in cosmetic esters, silicones, and natural carrier oils.
Incorporation Phase: Add directly to the oil phase of your batch. Although more heat-stable than standard Vitamin C and can safely withstand temperatures up to 80°C for brief blending windows, it is highly recommended to add THD Ascorbate during the cool-down phase (below 40°C / 104°F) of emulsions to maximize its stability.
Optimal Formulation pH: Remains stable across a wide, skin-friendly pH range of 4.0 – 6.5. It eliminates the need for harsh, highly acidic environments.
Tip: Pair with Vitamin E (Tocopheryl Acetate) in your oil blend to create a synergistic antioxidant network. Do not expose to direct, prolonged high heat.
Storage: Store in a cool, dry, dark environment away from direct heat sources. While it is far less prone to oxidizing than traditional Vitamin C, keeping it sealed in air-tight, amber glass containers will maximize its 12-month shelf life.
Suitability & Sustainability:
Cruelty-Free: 100% cruelty-free and never tested on animals.
Vegan-Friendly: Synthesized entirely via plant-derived and structural processes free from animal inputs.
GMO-Free: Manufactured without any genetically modified materials.
COMPARISON: THDA vs ATIP
Tetrahexyldecyl Ascorbate (THD) vs. Ascorbyl Tetraisopalmitate (ATIP)
Tetrahexyldecyl Ascorbate (THDA) and Ascorbyl Tetraisopalmitate (ATIP) are near-identical isomers that are frequently used interchangeably in the cosmetics industry, though they possess minor structural variations in their branched fatty acid chains.
They are both oil-soluble, ultra-stable Vitamin C derivatives.
They share the exact same chemical formula (C₇₀H₁₂₈O₁₀) and identical molecular weights (1129.76g/mol).
They both function as lipid-permeable powerhouses that convert to free Vitamin C inside the skin.
Feature | Tetrahexyldecyl Ascorbate (THD) | Ascorbyl Tetraisopalmitate (ATIP) |
Fatty Acid Chains | Four 2-hexyldecanoic acid chains (isomers of palmitic acid) | Four isopalmitate / isohexadecanoic acid chains |
Commercial Status | Widely used in North American luxury/clinical formulations | Heavily popularized in Japanese and global Asian cosmetic lines |
Skin Tolerance | Exceptionally gentle; favored for ultra-sensitive skin types | High skin affinity; exceptionally smooth skin-feel |
Efficacy & Texture | Lightweight, high-penetration oil-soluble liquid | Slightly richer lipid texture, exceptional long-term stability profile |
DISCLAIMER: For external use only. Our products are intended for use as cosmetic raw materials and should be handled by trained professionals following standard safety protocols. This product makes no therapeutic claims and is not intended to diagnose, treat, cure, or prevent any disease/health conditions. We strongly recommend consulting a qualified formulator or health practitioner for specific applications.
A. Selecting Price Option:
We offer two transparent pricing options based on your location. Please select the price for your region (Outside USA or Within USA). Price differences reflect mandatory regional Tariff and Duty compliance.
· USA Only: Duties are included in the price (Delivered Duty Paid - DDP). You will face no surprise fees or customs delays at delivery.
· Outside USA: Duties are NOT included in the price. The buyer is entirely responsible for settling any local duties or import taxes separately at purchase or upon arrival.
(i) U.S. Customers: To ensure full compliance with U.S. trade regulations, buyers shipping to the United States must select the "USA Only" pricing tier. This price includes all mandatory import tariffs.
Please note: Orders with unmatched shipping location and price selections will be automatically cancelled.
(ii) Select the “Outside USA” option if ordering from any location outside the United States. This price excludes regional Tariffs and Duties. The buyer is responsible for settling any local import fees at the time of purchase or upon delivery.
B. Shipping Information: (U.S. & EU)
Our standard shipping offers reliable tracking and predictable delivery timelines at an economical rate.
· U.S. Orders: By selecting the "USA Only" price tier, your import duties are fully prepaid (DDP).
EU Orders: Item prices remain unchanged, but mandatory EU duties are calculated and included directly in your shipping cost at checkout if we charged you VAT. This prepaid structure ensures compliance with international carrier mandates, expedites customs clearance, and guarantees zero unexpected fees upon arrival.