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Ethion

Ethion structure

CAS No:
563-12-2
Formula:
C9H22O4P2S4
Chemical Name:
Ethion
Synonyms:
Phosphorodithioic acid,SP,SP′-methylene OP,OP,OP′,OP′-tetraethyl ester;Phosphorodithioic acid,S,S′-methylene O,O,O′,O′-tetraethyl ester;RP 8167;ENT 24,105;Diethion;Ethion;Ethyl methylene phosphorodithioate ([(EtO)2P(S)S]2CH2);Niagara 1240;Phosphotox E;Rodocid;Tetraethyl S,S′-methylene bis(phosphorothiolothionate);O,O,O′,O′-Tetraethyl S,S′-methylene bis(phosphorodithioate);Ethopaz;Nialate;Hylemox;Hylemax;Rodocide;Fosfatox E;Rhodocide;Ethiol 100;Match;Tomahawk;12676-93-6;12738-47-5
Categories:
Agrochemicals > Insecticides

Description

Liquid. Slightly soluble in water; soluble in acetone, xylene, chloroform, and methylated naphthalene. ethion is an odorless amber liquid. It is very sparingly soluble in water, but soluble in most organic solvents. Ethion undergoes decomposition on heating or on burning and produces toxic and corrosive fumes, including phosphorus oxides and sulfur oxides. It is used for the control of crop pests and household insects. These include, but are not limited to, aphids, mite, sticks, scales, thrips

Ethion Basic Attributes

Molecular Weight：

384.48

Exact Mass：

384.48

EC Number：

209-242-3

Characteristics

PSA：

152

XLogP3：

5.073

Appearance：

Ethion is a colorless or amber colored liquid with a disagreeable odor. It is a wettable emulsifiable liquid. It is toxic by inhalation, skin absorption, and/or ingestion. It burns, but is not easily ignited. Fire may produce toxic and irritating fumes. It is used as a pesticide. May be found in the form of a dry mixture where the liquid is absorbed onto a dry carrier.

Density：

1.220 g/cm³ @ Temp: 20 °C

Melting Point：

-13--12 °C

Boiling Point：

165 °C @ Press: 0.3 Torr

Flash Point：

349°F

Refractive Index：

1.558

Water Solubility：

2 mg l -1 (25 °C)

Storage Conditions：

0-6°C

Vapor Pressure：

Vapour pressure, Pa at 25°C: 0.0002

Toxicity：

Oral-rat LD50: 13 mg/kg; Oral-Mouse LD50: 40 mg/kg

Flammability characteristics：

Open flame is flammable; heat releases toxic phosphorus oxide and sulfur oxide gas

Odor：

Odorless [Note: The technical product has a very disagreeable odor].

Safety Information

Packing level：

Hazard category：

6.1(a)

Transport codes：

3018

wgk germany：

hazard class code：

21-25-50/53

safety instructions：

25-36/37-45-60-61-23

RTECS Number：

TE4550000

Marks：

T,N

Storage features：

The warehouse is ventilated, low temperature and dry; stored and transported separately from food materials

Explosive characteristics：

Decomposition and explosion above 150℃

Stability/Shelf Life：

Unstable at elevated temperatures

Precautionary statement(s)：

P273-P280-P301 + P310 + P330-P302 + P352 + P312-P391-P501

Hazard Statements：

H301-H312-H410

Toxicity

Toxicity class：

most toxic

Ethion Use and Manufacturing

Methods of Manufacturing

Put O, O-diethyldithiophosphate, sodium bicarbonate, and sodium hydroxide into the reaction pot, the dosage is 500g, 60% sodium salt, 5g sodium bicarbonate, the amount of sodium hydroxide is Adjust the pH to 7 as the limit. Then press the sodium salt: dichloromethane = 1: 0.7 (mol) into dichloromethane. Fill the reaction pot with nitrogen to maintain a pressure of 0.2 to 0.4 MPa. The temperature is raised to 100～110℃, the reaction time is 5～8h, and the reaction pressure is 1～1.5MPa. The reaction is cooled down. After filtering out a small amount of filter residue, the crude oil was allowed to stand for layer separation, washed three times with water, and dehydrated under reduced pressure. The product yield is over 70% and the content is about 90%. Preparation Method One Preparation Method Two Preparation Method Three

Uses

Insecticide; acaricide.

Computed Properties

Molecular Weight:384.5
XLogP3:5.1
Hydrogen Bond Acceptor Count:8
Rotatable Bond Count:12
Exact Mass:383.98761787
Monoisotopic Mass:383.98761787
Topological Polar Surface Area:152
Heavy Atom Count:19
Complexity:279
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Material

Sodium bicarbonate

Formaldehyde

Dichloromethane