Product Identification

Product Name

3-tert-Butyl-5-chloro-6-methylpyrimidine-2,4(1H,3H)-dione

Synonyms

3-t-Butyl-5-chloro-6-methyluracil
3-tert-Butyl-5-chloro-6-methyl-1H-pyrimidine-2,4-dione
3-tert-Butyl-5-chloro-6-methyluracil
5-Chloro-3-(1,1-dimethylethyl)-6-methyl-2,4(1H,3H)-pyrimidinedione
5-Chloro-3-tert-Butyl-6-methyluracil

CAS

5902-51-2

Formula

C9H13ClN2O2

Molecular Weight

216.67

EINECS

227-595-1

RTECS

YQ9360000

RTECS Class

Agricultural Chemical and Pesticide

Merck

12,9298

Beilstein/Gmelin

643054

Beilstein Reference

5-24-07-00036

Physical and Chemical Properties

Appearance

Colorless crystals.

Solubility in water

710 mg/L @ 25 C

Melting Point

175-177

Boiling Point

386

Vapor Pressure

5E-7 (25 C)

Density

1.34 g/cm3 (25 C)

pKa/pKb

9.00 (pKa)

Partition Coefficient

1.89

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 a cool, dry place. Do not contaminate water, food or feed by storage.

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

Use good sanitary practices.

Respirators

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

Poison Class

-

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.

Fire Potential

Nonflammable

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

Active ingredient is chemically stable under normal storage conditions stable up to MP; stable in water, aqueous bases and common organic solvents @ room temperature.

Incompatibilities

Strong oxidizing agents.