Safety (MSDS) data for malathion

Safety (MSDS) data for malathion

Hazard: toxic


    Synonyms: 1,2-di(ethoxycarbonyl)ethyl O,O-dimethyl phosphorodithioate, [(dimethoxyphosphinothioyl)thio]butanedioic acid diethyl ester, carbofos, carbophos, etiol, malathine, malathyl, malatol, mercaptothion, moscarda, organoderm, very large number of other trade names
    Use: organophosphorus insecticide
    Molecular formula: C10H19O6PS2
    CAS No: 121-75-5
    EINECS No:

Physical data

    Appearance: yellow to brown liquid with an odour of skunk
    Melting point:
    Boiling point:
    Vapour density:
    Vapour pressure:
    Density (g cm-3):
    Flash point:
    Explosion limits:
    Autoignition temperature:
    Water solubility:


    Stable. Incompatible with oxidizing agents, metals.


    Toxic, and may be fatal, if swallowed. Eye irritant. Chronic exposure may be associated with mutagenic effects or reproductive harm. Some authorities believe that chronic exposure to organophosphates can cause CNS damage, possibly leading to poor coordination, depression, changes to the personality or other disorders. It should be noted that there is some disagreement about the potential hazards of using organophosphates in horticulture and farming, with some countries permitting only very limited use.

    Toxicity data
    (The meaning of any toxicological abbreviations which appear in this section is given here.)
    ORL-RAT LD50 2100 mg kg-1
    IPR-MUS LD50 985 mg kg-1
    ORL-MUS LD50 775 mg kg-1

    Risk phrases
    (The meaning of any risk phrases which appear in this section is given here.)
    R25 R36.

Transport information

    (The meaning of any UN hazard codes which appear in this section is given here.)

Personal protection

    Safety glasses, good ventilation, gloves (Silver Shield). Avoid long-term exposure.

    Safety phrases
    (The meaning of any safety phrases which appear in this section is given here.)

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This information was last updated on May 27, 2005. We have tried to make it as accurate and useful as possible, but can take no responsibility for its use, misuse, or accuracy. We have not verified this information, and cannot guarantee that it is up-to-date.