Product Identification

Product Name

4-Amino-6-tert-butyl-3-(methylthio)-1,2,4-triazin-5(4H)-one

Synonyms

4-Amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one
4-Amino-6-tert-butyl-3-methylthio-as-triazin-5-one
Lexone
Sencor

CAS

21087-64-9

Formula

C8H14N4OS

Molecular Weight

214.29

EINECS

244-209-7

RTECS

XZ2990000

RTECS Class

Agricultural Chemical and Pesticide; Mutagen; Reproductive Effector

Merck

12,6239

Beilstein/Gmelin

746650

Beilstein Reference

5-26-06-00432

EC Index Number

606-034-00-8

EC Class

Harmful; Dangerous for the Environment

Physical and Chemical Properties

Appearance

Colorless crystalline solid.

Solubility in water

1.2 g/L

Melting Point

126

Boiling Point

132 (0.1 torr)

Vapor Pressure

.0000004

Density

1.24 g/cm3

pKa/pKb

1.0 (pKa)

Partition Coefficient

1.7

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

Estimated shelf life in excess of 2 yr under normal storage conditions store in a cool, dry place. Do not contaminate water or feed by storage or disposal.

Handling

Untrained persons should not handle this chemical or its containers. Avoid contact with eyes, skin and clothing. Avoid breathing vapors.. For laboratory use only.

Hazards Identification

Inhalation

Symptoms: In animals: central nervous system depressant/depression; thyroid, liver enzyme changes Target Organs: central nervous system, thyroid, liver.

Skin

See inhalation.

Eyes

See inhalation.

Ingestion

See inhalation.

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 appropriate OSHA/MSHA approved respirator.

Exposure Effects

Coma was reported following ingestion of an herbicide containing atrazine, aminotriazole, ethylene glycol, and formaldehyde. Muscle tremors, tetany, and ataxia have been reported in animals following ingestions of triazine herbicides.

Exposure limit(s)

TLV: ppm; 5 mg/m3 (as TWA) (ACGIH 1997). OSHA PEL: none NIOSH REL: TWA 5 mg/m3

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.

Fire Potential

Nonflammable

Accidental Release Measures

Small spills/leaks

Evacuate area. Wear OSHA regulated equipment. Ventilate area. Sweep up and place in a n approved container. Hold for disposal. Wash contaminated surfaces to remove any residue.

Stability and Reactivity

Stability

Stable at normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents.

Decomposition

When heated to decomposition it emits very toxic fumes of nitrogen oxides and sulfur oxides.