1, Product name：9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-Oxide
2. English name: 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-Oxide (DOPO)
3, CAS No. ：35948-25-5
4. Structural formula:

5. Molecular formula: C₁₂H₉O₂P
6. Molecular weight: 216.17