Diallyl phthalate
CAS Number
131-17-9
EC Number
205-016-3
Abbreviation
DAP
What is Diallyl phthalate?
Diallyl phthalate (CAS 131-17-9), also known as DAP or by the trade names Dapon R and Dapon 35, is a reactive monomer and plasticizer used primarily in thermoset polymer systems.
Where is Diallyl phthalate used?
- Molding compounds and prepregs: crosslinking agent and reactive diluent for controlled cure profiles
- Plastics and composites: stable compounds for electrical connectors, circuit boards and aerospace components needing heat and chemical resistance
- Unsaturated polyester and alkyd resins: crosslinker that improves surface hardness and reduces shrinkage
- Printing and packaging: UV-curable coatings and inks with fast cure and adhesion to substrates
- Nail coatings: durable, high-gloss film formation
Good to know: Buyers should confirm purity and residual monomer content when sourcing prepolymer forms.
Commercial specifications
- Drum and IBC quantities
- Monomer-grade and prepolymer grades
Other Names (Synonyms)
Allyl phthalate|Dapon R|Dapon 35|Phthalic acid, diallyl ester|1,2-Benzenedicarboxylic acid, di-2-propenyl ester|o-Phthalic acid, diallyl ester|1,2-Benzenedicarboxylic acid, 1,2-di-2-propen-1-yl ester|DAP
What are the physical properties of Diallyl phthalate?
Melting Point -70 °C
Boiling Point 158-165 °C @ Press: 4 Torr
Density 1.120 g/cm³ @ Temp: 20 °C
Flash Point >230 °F
Appearance clear colourless to light yellow liquid
Color Clear colorless to light yellow
Odor mild odor
Form Liquid
Water Solubility 6 g/L (20 ºC)
Vapor Pressure 2.3 mm Hg ( 150 °C)
Refractive Index n 20/D 1.519(lit.)
Log P 3.23 at 20℃
How is Diallyl phthalate classified and handled safely? Learn More
Warning
GHS07· Irritant GHS09· Environmental Hazard GHS08· Health Hazard
Hazard Statements
H302 Harmful if swallowed
H317 May cause an allergic skin reaction
H332 Harmful if inhaled
H340 May cause genetic defects
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
Which trade and regulatory codes apply to Diallyl phthalate?
HS Code 29173400
UN Number 3082
ADR Class 9
Packing Group III
WGK (Germany) 2