Flame Retardant DOPO

Overview

DOPO (9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide) is a white flake or granular solid. Its reactive P–H bond allows it to be built into epoxy, polyester and other resins as a halogen-free, non-migrating flame retardant.

Also known as

DOPO; 9,10-Dihydro-9-oxa-10-phosphaphenanthrene 10-oxide

CAS number

35948-25-5

Molecular formula

C12H9O2P

Molecular weight

216.17

Specifications

Test items	Specifications
Appearance	White flakes/granules
Content /%	≥99
Phosphorus content /%	≥14
Chlorine content /ppm	<200

Applications

• Reactive flame retardant for epoxy resins in copper-clad laminates and electronic encapsulation
• Flame-retardant polyester fibers and engineering plastics
• Intermediate for DOPO derivatives and phosphorus-containing curing agents
• Antioxidant and anti-yellowing additive

Packaging

25 kg/bag (PE-lined).

Storage

Store in a cool, dry, ventilated place with the bags kept sealed, protected from moisture.