DOPO is a high-end reactive organophosphorus flame retardant monomer with high chemical activity. It can be directly connected into the molecular chain of polymer resin to realize permanent flame retardancy without migration, precipitation and blooming. It has outstanding heat and oxidation resistance, halogen-free and low smoke, being an indispensable core flame retardant synthetic raw material for copper clad laminates, flame retardant epoxy resins, electronic potting compounds and high-end polyester materials.
| Chemical Name | 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide |
| Chemical Formula | C₁₂H₉O₂P |
| CAS | 35948-25-5 |
| Appearance | White to off-white crystalline powder |
| Melting point | 117-121℃ |
| Boiling point | Sublimate and decompose at high temperature |
| Density（ρ20）, g/cm³ | 1.38 |
| Molecular Weight | 210.17 |
| Solubility | Soluble in hot toluene, DMF, NMP and hot ethanol, almost insoluble in cold water |
Used for synthesis of halogen-free flame retardant epoxy resin, special flame retardant resin for PCB copper clad laminate, high temperature resistant flame retardant potting adhesive for electronic components, copolymerization modification of flame retardant polyester fiber, high-end high temperature resistant fireproof coating and bio-based environmental friendly flame retardant polymer materials.
Store hermetically away from light and moisture at low temperature, prevent moisture from reducing reaction activity, keep away from acid-base catalysts and oxidants, manage separately as high-end flame retardant raw materials.
We mainly supply agricultural fertilizers including urea, potassium sulfate, ammonium chloride and water-soluble fertilizer materials; as well as industrial chemical raw materials such as calcium chloride, sodium bicarbonate and phosphate products.
Yes. We can provide batch COA, MSDS, certificate of origin and other full set of export documents to meet customs clearance requirements worldwide.
Sure. We offer agricultural grade and industrial grade products. Customized purity, particle size and packaging are all available as customers' demands.
Sample order is acceptable. For bulk orders, goods can be delivered within 3-7 days for in-stock items. We also support long-term bulk order production arrangement.
We offer exclusive one-on-one pre-sales and after-sales responses throughout the process, along with customized supporting solutions, ensuring high efficiency, peace of mind, and reliable and stable delivery.
With 26 years of in-depth experience in the chemical industry, we have a well-established supply chain system, sufficient production capacity reserves, and the ability to provide large-scale supplies and continuous delivery.
We adhere to research and development innovation and strict quality control. Our formula and process are mature and stable, and our products feature high purity, stable performance, and are suitable for high-end application requirements in multiple industries.
If you have any questions, concerns, or need assistance, please feel free to contact us via phone, email, or online customer service at any time, and we will provide you with support and answers as soon as possible.
Copyright © 2026 by Waycen Technology （Shandong）Co., Ltd. All Rights Reserved
