Product Identification

Product Name

N-(3,4-Dichlorophenyl)-N'-methoxy-N'-methylurea

Synonyms

1-Methoxy-1-methyl-3-(3,4-dichlorophenyl)urea
3-(3,4-Dichlorophenyl)-1-methoxymethylurea
Herbicide 326
Urea, 3-(3,4-dichlorophenyl)-1-methoxy-1-methyl
Urea, N'-(3,4-dichlorophenyl)-N-methoxy-n-methyl

CAS

330-55-2

Formula

C9H10Cl2N2O2

Molecular Weight

249.1

EINECS

206-356-5

RTECS

YS9100000

RTECS Class

Agricultural Chemical and Pesticide; Mutagen

Merck

12,5534

Beilstein/Gmelin

2128725

EC Index Number

006-021-00-1

EC Class

Carcinogenic Category 3; Harmful; Dangerous for the Environment

Physical and Chemical Properties

Appearance

Colorless crystals.

Solubility in water

75 mg/L (25 C)

Melting Point

93 - 94

Vapor Pressure

1E-6 (25 C)

Density

1.49 g/cm3 (20 C)

pKa/pKb

12.13 (pKa)

Partition Coefficient

3.2

Usage

Herbicide.

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 and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.

Eyes

Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Handling and Storage

Storage

Store in cool, dry place.

Handling

All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

Hazards Identification

Ingestion

Nausea, vomiting, and diarrhea may be noted following ingestion.

Skin

Cyanosis unresponsive to oxygen therapy may be noted in patients with methemoglobinemia due to absorption of excessive amounts of these agents.

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

Use NIOSH/MSHA approved respirator appropriate for exposure of concern.

Poison Class

4

Fire Fighting Measures

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 area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.

Stability and Reactivity

Stability

It is stable at its melting point and in neutral aqueous media. Dry formulations are stable under normal storage conditions. Hydrolyzed slowly by acids and alkalis at normal temperatures, and more rapidly at higher temperatures.

Incompatibilities

Strong oxidizing agents.