See All ProductsMalathion

Action

Insecticide

Use

Controls a wide range of pests on fruits, vegetables, ornamentals.

Formulation

Dust, emulsifiable concentrate, oil solution, powder, ULV concentrate, wettable powder.

Identification

Common Names

Malathion (ISO, BSI, ESA, USAN, USP, BAN); Mercaptothion (So. Africa); Carbofos (USSR); Mercaptotion (Argentina); Maldison (Australia, New Zealand)

CAS Code

121-75-5

Other Code Number

SHA 057701

Chemistry

Compositions

diethyl (dimethoxyphosphinothioylthio)succinate or S-1,2-bis(ethoxycarbonyl)ethyl O,O-dimethyl phosphorodithioate (IUPAC); diethyl 2-[(dimethoxyphosphinothioyl)thio]butanedioate (CAS)

Properties

Clear to amber liquid with a mercaptan odor. Specific gravity 1.23 at 25°C. Melting point 2.85°C. Vapor pressure 4 x 10-5 mm Hg at 30°C. Miscible in most organic solvents; limited solubility in aliphatic hydrocarbon.

Molecular Formula

C10H19O6PS2

Mode of Action / Resistance Management

Chemical Group

organophosphates

Mode of Action

Acetylcholinesterase (AChE) inhibitors

Action Group

IRAC Group 1B

Environmental Guidelines

Hazard

Fish: Toxic. LC50 200 ppm. (rainbow trout). Bee: Toxic

Water Solubility

145 ppm

Safety Guidelines

Signal Word

CAUTION

Toxicity Class

III

Toxicity

Min. 95% Tech (Rat): Oral 5500 mg/kg. Dermal >2000 mg/kg. Inhalation (4 h) >5.2 mg/l

Handling/Storage Caution

Store in cool, dry, well-ventilated, secure area out of reach of children and animals. Harmful if swallowed or inhaled. Avoid contact with skin. Wash thoroughly after handling. Change contaminated clothing. Do not contaminate food or feed. Biological activity of malathion premium grade remains practically unvaried for 2 years if stored in unopened, undamaged original containers, in cool, shaded, well-ventilated area. Recommended 68-86°F (20-25°C) for good shelflife. Do not heat above 55°C. Above 100°C, decomposes rapidly and explosion may be induced

Protective Clothing

Chemical-resistant footwear plus socks. Long-sleeved shirt and long pants. Chemical-resistant gloves. Protective eyewear.

Emergency Guidelines

Flashpoint

Above 325°F (TOC)

Fire Extenguishing Media

Water, foam, carbon dioxide, dry chemical

First Aid

Get medical aid. Eyes: flush with plenty of water for 15 minutes. Skin: remove clothing, flush skin with plenty of water. Inhalation: remove to fresh air. Give oxygen if breathing difficult. Ingestion: induce immediate vomiting.