| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | organic phosphorus plant growth regulator. It can act on plant meristem, inhibit cell division and elongation, and inhibit plant photosynthesis and protein synthesis. Different plants have different responses to phosphine regulation in different growth stages, and the effects of different dosages are also different. Effective concentration of 6~15g/L can kill some plants; 1~5g/L can inhibit plant growth; 10~100mg/L can promote plant growth. Since the effect of the regulatory phosphine is directed to the growth and differentiation of the buds, it may cause phytotoxicity during the active phase of growth and before the apical bud of the conifers stops growing. With 250 ~ 500mg/L foliar spray, can control the growth of citrus summer shoots; With 1000 ~ 1500mg/L top foliar spray, can make the rubber tree dwarf; With 1000mg/L foliar spray, can control apple, grape shoot growth. The regulated Phosphine may also be used as a irrigation-killing agent or to control some weeds, for example, for the killing and controlling of coniferous tree species such as cedar, Pinus tabulaeformis, spruce, Korean pine, and Pinus sylvestris. Chemical pruning of ornamental plants and preservation of flowers can also be used. |
| production method | methyl chloroformate was slowly added dropwise to triethyl phosphite and subjected to rearrangement reaction under heating, diethyl methoxyformyl phosphonate is produced. Ammonia is then passed through the toluene solution to produce diethyl carbamoylphosphonate. Finally, it reacts with ammonia water, and is separated and concentrated to obtain the adjusted phosphine. |
| category | pesticide |
| toxicity grade | low toxicity |
| Acute toxicity | oral-rat LD50: 11000 mg/kg; Oral-guinea pig LD50: 7380 mg/kg |
| flammability hazard characteristics | toxic nitrogen oxides, ammonia and phosphorus oxide gases produced by combustion |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored and transported separately from food raw materials |
| extinguishing agent | dry powder, foam, sand |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
