What Is Ethylhexyl Triazone?

2026-08-19

Ethylhexyl triazone is the oil-soluble UV absorber with the strongest UV-B absorption capacity. It exists as a pale yellow crystalline powder and features high light stability, water resistance, and affinity for skin keratin. It is widely used in sunscreens, rubber and plastic products, and food packaging.

How is Ethylhexyl Triazone prepared?

Ethylhexyl triazone is primarily synthesised from melamine (or trichlorocyanuric acid) and p-chlorobenzoic acid/p-aminobenzoate esters as starting materials. A crude product is first synthesised via a two-step process (such as condensation and esterification/ester exchange reactions), which is then purified by crystallisation under alkaline conditions.

What Are the Properties of Ethylhexyl Triazone?

Melting point	128°
Boiling point	869.5±75.0°C (Predicted)
Density	1.129±0.06 g/cm³ (Predicted)
vapor pressure	0Pa at 20℃
Flash point	307°C
storage temp.	Keep in dark place, inert atmosphere, room temperature
solubility	DMSO: 30 mg/mL (36.45 mM)
pka	1.22±0.10(Predicted)
color	White to Light yellow
Water Solubility	5-7μg/L at 25℃

You Also Like

Is Ethylhexyl Triazone Safe?

Symbol(GHS)	GHS07
Signal word	Warning
Hazard statements	H413
Precautionary statements	P273-P501
Risk Statements	53
Safety Statements	61-24/25
WGK Germany	1
Storage Class	11 - Combustible Solids
Hazard Classifications	Aquatic Chronic 4

What is Ethylhexyl Triazone Used For?

Ethylhexyl triazone is the oil-soluble UV-B absorber with the highest UV-B absorption capacity. It has high photostability and prevents UV-B-induced immunosuppression. It is highly water-resistant and has good affinity for skin keratin.