Actives · CAS 183476-82-6
THD Ascorbate
INCI: Tetrahexyldecyl Ascorbate
THD Ascorbate is the oil-soluble vitamin C ester — an Actives-category cosmetic ingredient (Tetrahexyldecyl Ascorbate, CAS 183476-82-6) supplied by RAWESS with a batch certificate of analysis on every lot. Key specification: Assay (HPLC) ≥ 99.0%. Minimum order quantity is 1 kg with a 3-5 days (stock) lead time; shipment is FOB · CIF · DDP from Esterification · in-house. Typical use levels: Anhydrous vitamin C serums 1-5% · Eye oils & concentrates · Encapsulated delivery systems. Certification: ISO 22716 GMP · ISO 9001 · REACH-aligned dossier. Standard packaging: 1kg / 5kg aluminum, N2; storage ≤ 20°C; shelf life 24 months, nitrogen-flushed.
| INCI name | Tetrahexyldecyl Ascorbate |
|---|---|
| CAS number | 183476-82-6 |
| Product family | Actives |
| Appearance | Colorless to pale yellow oil |
| Assay (HPLC) | ≥ 99.0% |
| MOQ | 1 kg |
| Lead time | 3-5 days (stock) |
| Packaging | 1kg / 5kg aluminum, N2 |
| Storage | ≤ 20°C |
| Origin | Esterification · in-house |
| HS code | HS 2936.29 |
| Applications | Anhydrous vitamin C serums 1-5% · Eye oils & concentrates · Encapsulated delivery systems |
| Shelf life | 24 months, nitrogen-flushed |
Why this grade
L-ascorbic acid is a formulation race against oxidation. Tetrahexyldecyl ascorbate ends it: oil-soluble, non-acidic, and stable for the life of the product. Ours assays at 99% with peroxide values tight enough for anhydrous concentrates.
Compatible with retinoids, AHAs and standard emulsifier systems, THD is the vitamin C for sophisticated formats — eye oils, anhydrous serums, and encapsulated delivery. Use at 0.5-5%; no pH constraints.
Key benefits
- 99% assay, peroxide value ≤ 3 meq/kg — clean enough for anhydrous formats
- Stable in oil phase — no discoloration over 24-month shelf studies
- Converts to ascorbic acid in-skin via esterase activity
- Synergistic with retinol and bakuchiol in the same phase
Technical specification
Ingredient profile
Tetrahexyldecyl Ascorbate — THD Ascorbate — is the oil-soluble, esterified form of vitamin C that survives formulation and shelf life where L-ascorbic acid does not. Ours is 99%-plus pure by HPLC with a peroxide value under 3 meq/kg.
Made by in-house esterification, the material dissolves into the oil phase of serums, creams and facial oils, where it delivers vitamin-C activity at 1–3% use without the acidity of free ascorbic acid.
It is vegan and allergen-free, and the batch COA covers assay, peroxide value and heavy metals. It pairs with bakuchiol and peptides in brightening-and-aging programs.
Related: our full actives range · full catalog
B2B supply terms
Applications
Sample & quote
100g evaluation sample with mini-COA ships within 48 hours for qualified buyers. Volume quote with tier pricing returns in one business day — with the batch COA attached, not promised.
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