Diethylamino hydroxybenzoyl hexyl benzoate is an organic compound also known as Ethylhexyl Triazone or Uvinul® T 150, is a chemical compound commonly used in sunscreens as a UV filter.

The name describes the structure of the molecule:

• Diethylamino indicates the presence of a functional group containing two ethyl groups (CH₃CH₂-) attached to a nitrogen (amino) atom.
• Hydroxybenzoyl suggests the presence of a benzoyl group (a benzene ring attached to a carbonyl group) that also has a hydroxyl (OH) group attached to the benzene ring.
• Hexyl indicates an alkyl chain with six carbon atoms.
• Benzoate refers to an ester of benzoic acid.

Description of the raw materials used in its production:

• Diethylamine is an organic compound that serves as a precursor in the synthesis of diethylamino hydroxybenzoyl hexyl benzoate. It is typically produced through the reaction of ethanol with ammonia.
• Hydroxybenzoic acid, also known as salicylic acid, is a carboxylic acid that is often derived from natural sources such as willow bark. It is an important starting material in the synthesis of diethylamino hydroxybenzoyl hexyl benzoate.
• Hexyl benzoate is an ester derived from hexyl alcohol and benzoic acid. It contributes to the overall structure and properties of diethylamino hydroxybenzoyl hexyl benzoate.

Industrial chemical synthesis step-by-step:

• Esterification - Diethylamino hydroxybenzoyl hexyl benzoate is synthesized through the esterification reaction of diethylamino hydroxybenzoyl chloride with hexyl benzoate. This reaction typically takes place under specific temperature and pH conditions, and a catalyst may be used to facilitate the reaction.
• Purification - The crude product obtained from the esterification reaction is purified to remove any impurities or by-products. This purification step may involve techniques such as filtration, distillation, or crystallization.
• Quality Control - The purified diethylamino hydroxybenzoyl hexyl benzoate undergoes rigorous quality control tests to ensure its purity, stability, and compliance with safety regulations and industry standards.
• Formulation - Diethylamino hydroxybenzoyl hexyl benzoate is incorporated into sunscreen formulations at specific concentrations to provide UV protection. It is often combined with other UV filters and active ingredients to achieve the desired sun protection factor (SPF) and broad-spectrum coverage.

It appears in the form of a white powder. 

What it is for and where

Cosmetics

Diethylamino hydroxybenzoyl hexyl benzoate provides protection against both UVA and UVB rays.

It is a restricted ingredient as VI/28 a Relevant Item in the Annexes of the European Cosmetics Regulation 1223/2009. Substance or ingredient reported: Benzoic acid, 2-[4-(diethylamino)-2-hydroxybenzoyl]-, hexylester

UV filter. It is the defining ingredient in sun creams that can mitigate the sun's ultraviolet (UV) radiation, which is a high risk factor for the development of skin cancer, erythema and photo-ageing. 

UV absorber. It acts by intercepting ultraviolet light before it can cause damage by reducing its energy through dissipation and returning it to a lower energy state.

Light stabilizer. It prevents light from degrading light-sensitive components and slows down degradation reactions that have already begun. The mechanism is, in a way, similar to antioxidants and the effectiveness depends on the.complexity of the formulation and the density of the product.

Diethylamino hydroxybenzoyl hexyl benzoate studies

• Molecular Formula: C₂₄H₃₁NO₄
• Molecular Weight: 397.515 g/mol
• UNII: ANQ870JD20
• CAS: 302776-68-7
• EC Number: 443-860-6  608-453-1
• PubChem Substance ID 329770267
• MDL number MFCD11616752

Synonyms:

• Hexyl 2-(4-(diethylamino)-2-hydroxybenzoyl)benzoate
• Uvinul A Plus
• DHHB
• Diethylamino hydroxybenzoyl hexyl benzoate
• Hexyl 2-[4-(Diethylamino)-2-hydroxybenzoyl]benzoate
• 2-[4-(DIETHYLAMINO)-2-HYDROXYBENZOYL]BENZOIC ACID HEXYL ESTER
• Benzoic acid, 2-[4-(diethylamino)-2-hydroxybenzoyl]-, hexyl ester
• 2-hydroxy-4-diethylamino-2'-hexyloxycarbonylbenzophenone
• n-Hexyl 2-(4-Diethylamino-2-hydroxybenzoyl)benzoate
• Benzoic acid, 2-(4-(diethylamino)-2-hydroxybenzoyl)-, hexyl ester