| Name | Phosphonic acid, dimethyl ester;Dimethyl phosphite |
| Molecular weight | 110.05 |
| CAS No. | 868-85-9 |
| Boiling point | 170-171℃，56.5℃（1.07kPa） |
| Relative density | 1.200（24/4℃） |
| Refractive index | 1.4035 |
| Flash point | 29℃ |
| Character | Colorless liquid liquid. |
| Function | It can be used as a lubricating oil additives, adhesives and some organic synthesis intermediate. Omethoate for synthetic pesticides, cyclic dimethyl sulfide and herbicides such as Roundup Ready |