Molecular Formula | C7H13O6P |
Molar Mass | 224.15 |
Density | 1.25 g/cm3 (20℃) |
Melting Point | 13.95℃ |
Boling Point | 115-117℃ (2 Torr) |
Flash Point | -18°C |
Water Solubility | Miscible (Gunther et al., 1968) |
Solubility | Miscible with acetone, benzene, chloroform, ethanol, ketones, toluene, and xylene. Soluble incarbon disulfide and kerosene (50 g/L) (Windholz et al., 1983; Worthing and Hance, 1991). |
Vapor Presure | 2.2 x 10-3 mmHg at 20 °C, 5.7 at 29 °C (Freed et al., 1977) |
Appearance | liquid (rough estimate) |
Color | Colorless to pale yellow liquid with a weak odor |
Exposure Limit | NIOSH REL: TWA 0.01 ppm, STEL 0.03 ppm, IDLH 4 ppm; OSHAPEL: 0.1 mg/m3; ACGIH TWA: TLV 0.01 ppm, STEL 0.03 ppm. |
Storage Condition | APPROX 4°C |
Stability | Stable. Combustible. Incompatible with strong oxidizing agents. |
Refractive Index | 1.4494 (589.3 nm 20℃ |
Physical and Chemical Properties | The product has trans isomer [298-01-1] and cis isomer [338-45-4]. The cis melting point is 6.9 ℃, the relative density is 1.245, and the refractive index is 1.4524. The trans melting point is 21 ℃, the relative density is 1.2345, and the refractive index is 1.4452. Phosphos is a mixture of the two, in which the trans content is 60%. It is a light yellow liquid with a boiling point of 99-103 ℃(40Pa) and a refractive index of 1.4494. The vapor pressure (20 ℃) is 1.65 × 10-2Pa. Easily soluble in water, miscible with alcohols, ketones and other solvents, slightly soluble in ester hydrocarbons. Stable storage at room temperature and hydrolysis in water. Hydrolysis is accelerated in alkaline aqueous solution, with a pH of 6: 00 and a half decay period of 120d, a pH of 9: 00 and a half decay period of 3d, and a pH of 11: 00 and a half decay period of only 1.4h. |
Risk Codes | R27/28 - R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R67 - Vapors may cause drowsiness and dizziness R65 - Harmful: May cause lung damage if swallowed R38 - Irritating to the skin R11 - Highly Flammable R20 - Harmful by inhalation |
Safety Description | S23 - Do not breathe vapour. S28 - After contact with skin, wash immediately with plenty of soap-suds. S36/37 - Wear suitable protective clothing and gloves. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S62 - If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label. |
UN IDs | 3018 |
RTECS | GQ5250000 |
HS Code | 29199000 |
Hazard Class | 6.1(a) |
Packing Group | I |
Toxicity | LD50 in female, male rats (mg/kg): 3.7, 6.1 orally; 4.2, 4.7 dermally (Gaines) |
EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
use | maphos is a water-soluble organic phosphorus insecticide and acaricide. The insecticidal spectrum is wide, and it has a good control effect on cotton aphid, bollworm, apple aphid, apple spider, corn aphid, soybean aphid, and cabbage. |
Production method | Methyl 2-chloroacetoacetate is prepared by chlorination of methyl acetoacetate with sulfuryl chloride, and then reacts with trimethyl phosphite to rearrange in toluene to obtain instant phosphorus (40% EC). |
category | pesticide |
toxicity classification | highly toxic |
acute toxicity | oral-rat LD50: 3 mg/kg; Oral-mouse LD50: 4 mg/kg |
flammability hazard characteristics | open flame is combustible; heating emits toxic phosphorus oxide gas |
storage and transportation characteristics | warehouse ventilation and low temperature drying; separate from food raw materials storage and transportation |
fire extinguishing agent | sand, dry powder, foam |
occupational standard | TWA 0.1 mg/m3; STEL 0.3 mg/m3 |
toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
immediate life-threatening and health concentration | 4 ppm |