Product Identification

Product Name

Chlorthal-dimethyl

Synonyms

1,4-Benzenedicarboxylic acid, 2,3,5,6-tetrachloro- dimethyl ester
2,3,5,6-Tetrachloroterephthalic acid dimethyl ester
Dacthal
Dimethyl 2,3,5,6-tetrachlorobenzene-1,4-dicarboxylate
Dimethyl 2,3,5,6-Tetrachloroterephthalate
Tetrachloroterephthalic acid dimethyl ester

CAS

1861-32-1

Formula

C10H6Cl4O4

Molecular Weight

331.97

EINECS

217-464-7

RTECS

WZ1500000

RTECS Class

Agricultural Chemical and Pesticide; Reproductive Effector

Merck

12,2896

Beilstein/Gmelin

1888840

Beilstein Reference

3-09-00-04257

Physical and Chemical Properties

Appearance

Colorless, crystalline solid.

Solubility in water

Insoluble.

Melting Point

159

Boiling Point

422

Vapor Pressure

2.5E-7 (25 C)

Partition Coefficient

3.77

Heat Of Vaporization

67.6 kJ/mol

Usage

It is presently approved for use on turf, ornamentals, strawberries, and agronomic crops including cotton, soybeans, and field beans. It is effective against smooth & hairy crabgrass, witchgrass, green & yellow foxtails, fall panicum & other annual grasses. It is also useful against certain broad-leaved weeds such as carpet weed purslane & common chickweed. It is tolerated by many crop plants.

First Aid Measures

Ingestion

Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.

Inhalation

If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.

Skin

Remove contaminated clothing. Wash exposed area with soap and water. If symptoms persist, seek medical attention. Launder clothing before reuse.

Eyes

If symptoms develop, immediately move individual away from exposure and into fresh air. Flush eyes gently with water for at least 15 minutes while holding eyelids apart; seek immediate medical attention.

Handling and Storage

Storage

Keep closed in a cool, dry place. Store only with compatible chemicals.

Handling

For laboratory use only. Do not wear contact lenses. Use in a chemical hood with protective equipment.

Hazards Identification

Ingestion

Nausea, vomiting and diarrhea are possible if ingested.

Inhalation

Cough, tachypnea, and wheezing are common after inhalation.

Skin

Redness, swelling and pain may occur.

Eyes

Irritation.

EC Safety Phrase

S 22 24/25

Exposure Controls/Personal Protection

Personal Protection

Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.

Respirators

OSHA/MSHA approved respirator.

Poison Class

5

Fire Fighting Measures

Flash Point

175

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire.

Accidental Release Measures

Small spills/leaks

Evacuate and ventilate area. Wear appropriate protective equipment. Sweep up and place in an appropriate waste container. Wash contaminaed surfaces to remove residue.

Stability and Reactivity

Stability

Stable in the pure state stable to UV irradiation.

Incompatibilities

Strong oxidizing agents.

Decomposition

No data.