ORTHOPHOS(R)
ORTHOPHOS(R) - Names and Identifiers
| Name | parathion |
| Synonyms | 1605 SNP(R) ALKRON(R) parathion THIOPHOS(R) ACC 3422(R) ORTHOPHOS(R) O,O-diethyl S-(4-nitrophenyl) thiophosphate O,O-diethyl O-(4-nitrophenyl) thiophosphate O,O-Diethyl-O-(p-nitrophenyl)thionophosphate O,O-diethyl O-4-nitrophenyl phosphorothioate O,O-DIETHYL-O-P-NITROPHENYL PHOSPHOROTHIOATE O,O-DIETHYL O-(4-NITROPHENYL) PHOSPHOROTHIOATE |
| CAS | 56-38-2 |
| EINECS | 200-271-7 |
| InChI | InChI=1/C10H14NO5PS/c1-3-14-17(18,15-4-2)16-10-7-5-9(6-8-10)11(12)13/h5-8H,3-4H2,1-2H3 |
ORTHOPHOS(R) - Physico-chemical Properties
| Molecular Formula | C10H14NO5PS |
| Molar Mass | 291.26 |
| Density | 1.26 |
| Melting Point | 6.1°C |
| Boling Point | 375°C |
| Flash Point | 120°C |
| Water Solubility | Slightly soluble |
| Solubility | 2,900 and 2,700 g/kg in petroleum ether and heptane, respectively (Williams, 1951) |
| Vapor Presure | 0.470 at 20 °C, 0.942 at 25 °C, 1.84 at 30 °C, 3.53 at 35 °C, 6.62 at 40 °C, 12.18 at 45 °C (gassaturation method, Spencer et al., 1979) |
| Appearance | liquid |
| Color | Pale-yellow liquid |
| Exposure Limit | NIOSH REL: TWA 0.05 mg/m3, IDLH 10 mg/m3; OSHA PEL: TWA0.1 mg/m3. |
| Merck | 13,7105 |
| BRN | 8912188 |
| Storage Condition | APPROX 4°C |
| Refractive Index | nD25 1.5370 |
| Physical and Chemical Properties | Colorless oily liquid. Melting point 6 ℃, boiling point 375 ℃,157-162 ℃(0.08kPa), relative density 1.2656(25/4 ℃), refractive index 1.5370(25 ℃), vapor pressure (20 ℃) 5 × 10-6kPa. The solubility in water is 24mg/L(25 °c). Slightly soluble in petroleum ether and kerosene, miscible with most organic solvents. There is a smell of garlic. Rapid hydrolysis in alkaline medium; Relatively stable in neutral or micro-solution; Unstable to ultraviolet light and air. |
| Use | For the control of a variety of aphid, Red Spider and other pests |
ORTHOPHOS(R) - Upstream Downstream Industry
| Raw Materials | Diethyl chlorothiophosphate o-Xylene Chlorine Octoxinol Phosphorus pentasulfide Ethyl Alcohol |
ORTHOPHOS(R) - Nature
Open Data Verified Data
pure product is light yellow oily liquid, industrial product is brown liquid, with garlic flavor. Soluble in benzene, toluene, xylene, acetone, ethanol and other organic solvents, slightly soluble in alkanes, difficult to dissolve in water (75 degrees in water solubility of 24mg/L). Stable in neutral and slightly acidic solution, easy to decompose in case of alkali. When the pH is 5~6(20 degrees C), the hydrolysis of 1% needs 62d, and the isomerization occurs by heating.
Last Update：2025-06-10 22:55:16
ORTHOPHOS(R) - Preparation Method
Open Data Verified Data
obtained from the synthesis of diethyl thiophosphoryl chloride with sodium p-nitrophenolate under the catalysis of trimethylamine.
Last Update：2022-01-01 10:11:54
ORTHOPHOS(R) - Application
Open Data Verified Data
A broad-spectrum of highly toxic insecticides, both acaricidal effect, with a strong contact to kill and stomach poison effect, there is a certain role of fumigation, no absorption, but there is a strong penetration. Can Control rice, cotton and fruit crops on a variety of pests, the main control of rice borer, cotton bollworm, corn borer, sorghum stripe borer and other pests. Prevention and Treatment of Chilo suppressalis, Chilo suppressalis, Borer. It is forbidden to use in vegetables, tea, fruit trees and Chinese herbal medicines. The melon is sensitive to parathion, especially the seedling, which is easy to cause the damage, and can not be used. Food crops are contraindicated 30d before harvest.
Last Update：2025-08-19 16:24:40
ORTHOPHOS(R) - Safety
Open Data Verified Data
The oral LD50 of male rats was 13mg/kg, and the female was 3.6mg/kg; The percutaneous LD50 of male rats was 21mg/kg, and the female was 6.8mg/kg; the lowest lethal dose in rats was 10 mg/m3. The oral no-effect dose was 2 mg/kg per day in rats and 1 mg/kg per day in dogs. The avian acute oral LD50 is 2 mg/kg. Carp LC50 4.5mg/L(48h).
Last Update：2022-01-01 10:11:56
ORTHOPHOS(R) - Reference Information
| Henry's Law Constant | 8.56 at 25 °C (wetted-wall column, Fendinger and Glotfelty, 1990) |
| (IARC) carcinogen classification | 2B (Vol. 30, Sup 7, 112) 2017 |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | parathion is a broad-spectrum insecticide with effects of contact killing, stomach poisoning and fumigation, without internal conduction, but it can penetrate into plants. The effect on insects is very fast, and the insecticidal effect is significantly faster at high temperature. It can be used to control pests of fruit trees such as cotton, apple, citrus, pear, peach and wheat red spider. for the control of rice, cotton, corn and other crops of pests, can also be used to control fruit trees, trees on a variety of chewing and stinging mouth insects for the control of various aphids, red Spider and other pests |
| production method | is obtained by synthesizing diethyl thiophosphoryl chloride with sodium p-nitrophenolate under the catalysis of trimethylamine. Raw material consumption quota: phosphorus pentasulfide 370kg/t, anhydrous ethanol 330kg/t, P-nitrophenol sodium 330kg/t. |
| category | pesticide |
| toxicity grade | highly toxic |
| Acute toxicity | oral-rat LD50: 2 mg/kg; Oral-mouse LD50: 5 mg/kg |
| flammability hazard characteristics | open flame flammable; Toxic phosphorus oxide, nitrogen oxide, sulfur oxide gas |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored and transported separately from food raw materials |
| fire extinguishing agent | Sand, dry powder, foam |
| Occupational Standard | TWA 0.1 mg/m3; Tel 0.3 mg/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-threatening and health concentration | 10 mg/m3 |
Last Update：2024-04-09 21:11:58
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