September 2010
NIOSH Publication Number 2010-168c

Metribuzin

Synonyms & Trade Names
4-Amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one
CAS No.
21087-64-9
RTECS No.
XZ2990000
DOT ID & Guide
Formula
C8H14N4OS
Conversion
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
: TWA 5 mg/m3
OSHA PEL
†: none
Measurement Methods

OSHA PV2044
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
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
Personal Protection/Sanitation
(See protection codes)
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

See also: INTRODUCTION   See ICSC CARD: 0516