Padimate-O
CAS Number
21245-02-3
EC Number
244-289-3
What is Padimate-O?
Padimate-O (CAS 21245-02-3), also known commercially as Ethylhexyl Dimethyl PABA, is an oil-soluble UV absorber that filters UVB radiation in the 290–315 nm range.
Where is Padimate-O used?
- Personal care: approved UVB filter in sunscreen and cosmetic formulations
- Lotions, creams, and lip care products to meet SPF performance targets
- Polymer manufacturing: UV stabilizer in plastic films and coatings
- Printing and packaging: incorporated into UV-curable ink and coating systems
- It contributes to controlled photoinitiator activity and cross-linking behavior.
Good to know: Its reactivity with certain resin systems positions it as a building block or catalyst precursor in specialty curing formulations.
Other Names (Synonyms)
Ethylhexyl dimethyl paba|4-(dimethylamino)benzoic acid 2-ethylhexyl ester|2-ethylhexyl 4-(dimethylamino)benzoate|Padimate o
What are the physical properties of Padimate-O?
Melting Point 242.5-243.5 °C
Boiling Point 325 °C
Density 0.995 g/mL at 25 °C(lit.)
Flash Point >230 °F
Color Off-White to Orange
Form neat
Water Solubility 100μg/L at 20℃
Vapor Pressure 0.001Pa at 25℃
Refractive Index n 20/D 1.542(lit.)
Log P 6.2
How is Padimate-O classified and handled safely? Learn More
Danger
GHS07· Irritant GHS08· Health Hazard
Hazard Statements
H315 Causes skin irritation
H319 Causes serious eye irritation
H335 May cause respiratory irritation
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P271 Use only outdoors or in a well-ventilated area.
Which trade and regulatory codes apply to Padimate-O?
HS Code 29224999
Storage Class 6.1C - Combustible acute toxic Cat.3
toxic compounds or compounds which causing chronic effects
WGK (Germany) 2