Product Identification

Product Name

Diethyl chlorothiophosphate

Synonyms

Diethyl chlorothiophosphate
Diethyl phosphorochlorodithionate
O,O-Diethyl phosphorochloridothioate
Phosphorochloridothioic acid O,O-diethyl ester

CAS

2524-04-1

Formula

C4H10ClO2PS

Molecular Weight

188.62

EINECS

219-755-4

RTECS

TD1780000

RTECS Class

Other

Beilstein/Gmelin

471434

Beilstein Reference

4-01-00-01352

Physical and Chemical Properties

Appearance

A colorless to light amber liquid with a disagreeable odor.

Solubility in water

Insoluble

Melting Point

<-75

Boiling Point

178

Vapor Pressure

0.9 (25 C)

Density

1.202 g/cm3 (0 C)

Partition Coefficient

821

Heat Of Vaporization

40.6 kJ/mol

Usage

Intermediate for pesticides, oil & gasoline additives, flame retardants, flotation agents.

Refractive Index

1.4708 (20 C)

First Aid Measures

Ingestion

Get medical aid immediately. Wash mouth out with water.

Inhalation

Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.

Skin

Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.

Eyes

Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Handling and Storage

Storage

Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Corrosives area.

Handling

Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Use only in a chemical fume hood.

Hazards Identification

Inhalation

May be fatal if inhaled. Causes chemical burns to the respiratory tract.

Skin

Harmful if absorbed through the skin. Causes skin burns.

Eyes

Causes eye burns.

Ingestion

Harmful if swallowed.

Hazards

Vapors form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.

UN (DOT)

2751

Exposure Controls/Personal Protection

Personal Protection

Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.

Respirators

Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Exposure Effects

Abnormal neuropsychologic function has been reported following hydrochloric acid exposure from a leaking tanker truck.

Exposure limit(s)

OEL-RUSSIA:STEL 1 mg/m3

Poison Class

2

Fire Fighting Measures

Flash Point

75

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Use foam, dry chemical, or carbon dioxide.

Fire Potential

HIGHLY FLAMMABLE.

Accidental Release Measures

Small spills/leaks

Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container.

Stability and Reactivity

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents.

Decomposition

Hydrogen chloride, carbon monoxide, oxides of sulfur, oxides of phosphorus, carbon dioxide.

Combustion Products

Fire will produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

2751

Hazard Class

8

Packing Group

II