DP Diphosgene  –  Trichlorometylchloroformate
Formula : ClCOOCCl3  
Description :  Vapor than gas not easily hydrolyzed drain by water 
                        it destroys heavy vegetation, jungle and forests.
                        State : Gas
                        Odor : New mown ay or grass, green corn
                        Color : Whitish vapor than colorless gas
                        Type : Chocking agent
                        Persistency: short but may persist in low places with 
                                             calm or low wind or atmospheric inversion.
                        Density: 1.653 g/cm3
                        Decomposition point: 800 C, Above 300° C will decay into CG
Symptoms : Affect lungs by causing watery fluid that leads to death within
                    24 hours, full effect appears after 3 to 4 hours 
                     Can recover in case of small amount . 
Protection :  Mask and respirator
First-Aid : Fresh air and Oxygen