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Chemical Name: Diethylamino Hydroxybenzoyl Hexyl Benzoate
Chemical Synonyms: DHHB; Uvinul A Plus; Hexyl 2-[4-(Diethylamino)-2-Hydroxybenzoyl]Benzoate
CAS No.: 302776-68-7
Molecular Formula: C₂₄H₃₁NO₄
Molecular Weight:397.51 g/mol
Diethylamino Hydroxybenzoyl Hexyl Benzoate (CAS 302776-68-7), commonly known as DHHB or Uvinul A Plus, is an oil-soluble organic UVA filter with peak absorption at approximately 354 nm, covering the UVA1 range responsible for deep photoaging and pigmentation . It is highly photostable, remaining stable after hours of UV exposure, unlike conventional avobenzone . With assay ≥99% and controlled DnHexP impurity levels, it is suitable for premium UVA protection, daily wear SPF products, and sensitive-skin formulations.
Parameter | Specification |
|---|---|
Product Name | Diethylamino Hydroxybenzoyl Hexyl Benzoate |
Synonyms | DHHB; Uvinul A Plus; Hexyl 2-[4-(Diethylamino)-2-Hydroxybenzoyl]Benzoate |
CAS Number | 302776-68-7 |
Molecular Formula | C₂₄H₃₁NO₄ |
Molecular Weight | 397.51 g/mol |
EC No. | 443-860-6 |
Assay / Purity | ≥99% |
Appearance | White to light yellow granular powder (raw material form) |
Absorption Peak | ~354 nm (UVA1 range) |
Solubility | Oil-soluble; incorporated in the oil phase of emulsions |
Grade | Cosmetic Grade |
Storage | Cool, dry place, protected from light and moisture |
Premium UVA Protection: Primary UVA filter for sunscreens, sun serums, and daily moisturizers targeting photoaging and pigmentation .
Avobenzone Alternative/Stabilizer: Provides UVA coverage without the photostability limitations of avobenzone; often paired with UVB filters for broad-spectrum systems .
Sensitive Skin Formulations: Low irritation and sensitization potential in patch tests; suitable for sensitive skin and photodermatoses patients .
Water-Resistant Products: Oil-soluble nature supports water-repellent and sweat-resistant claims.
EU / China / Japan / Australia: Permitted UV filter at maximum 10% concentration .
United States: Not approved as an OTC sunscreen filter by the FDA . Buyers targeting the US market must verify compliance before import.
DnHexP Impurity Concern: DHHB production may generate trace amounts of di-n-hexyl phthalate (DnHexP), a prohibited cosmetic ingredient. The EU SCCS has set a maximum safe level of 260 ppm in DHHB (when used at 10%), while recommending a target of 1 ppm via improved manufacturing processes . Buyers should specify DnHexP limits in their purchase specifications.
Handling: Use in a well-ventilated area. Avoid dust formation and inhalation.
Superior Photostability: Remains stable after extended UV exposure, providing reliable UVA protection without the degradation issues of avobenzone .
Low Irritation Profile: Minimal skin irritation and sensitization potential, suitable for sensitive-skin and daily-use formulations .
Minimal Systemic Absorption: Human blood studies report DHHB below detection limits after application, indicating low systemic exposure .
Controlled Impurity: DnHexP content can be specified to meet your target market requirements (standard ≤260 ppm; lower levels available upon request) .
Full Documentation: COA and MSDS available upon request.
Standard Packaging: 1 kg / 5 kg / 25 kg in aluminum foil bags or fiber drums, or customized packaging upon request.
Storage Conditions: Store in a tightly closed container in a cool, dry place, protected from light and moisture.
Shelf Life: 24 months under proper storage conditions.
