NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

Metribuzin

CAS
21087-64-9

C8H14N4OS

RTECS
XZ2990000
Synonyms & Trade Names

4-Amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one
DOT ID & Guide

Exposure
Limits

NIOSH REL: TWA 5 mg/m3
OSHA PEL: none
IDLH
N.D. See: IDLH INDEX
Conversion
Physical Description
Colorless, crystalline solid. [herbicide]
MW: 214.3
BP: ?
MLT: 257°F
Sol: 0.1%
VP: 0.0000004 mmHg
IP: ?

Sp.Gr: 1.31
Fl.P: NA
UEL: NA
LEL: NA

Noncombustible Solid
Incompatibilities & Reactivities

None reported
Measurement Methods
OSHA PV2044
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated/Daily
Remove: When wet or contaminated
Change: Daily

First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Soap wash
Breathing: Fresh air
Swallow: Medical attention immediately
Respirator Recommendations
Not available.
Important additional information about respirator selection
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
In animals: central nervous system depression; thyroid, liver enzyme changes
Target Organs
central nervous system, thyroid, liver
See also: INTRODUCTION   See ICSC CARD: 0516