NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

Clopidol

CAS
2971-90-6

C7H7Cl2NO

RTECS
UU7711500
Synonyms & Trade Names

Coyden®; 3,5-Dichloro-2,6-dimethyl-4-pyridinol
DOT ID & Guide

Exposure
Limits

NIOSH REL: TWA 10 mg/m3 (total) ST 20 mg/m3 (total) TWA 5 mg/m3 (resp)
OSHA PEL: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)
IDLH
N.D. See: IDLH INDEX
Conversion
Physical Description
White to light-brown, crystalline solid.
MW: 192.1
BP: ?
MLT: >608°F
Sol: Insoluble
VP: ?
IP: ?

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

Noncombustible Solid, but dust may explode in cloud form.
Incompatibilities & Reactivities

None reported
Measurement Methods
NIOSH 0500, 0600
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
Skin: No recommendation
Eyes: No recommendation
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation

First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Soap wash
Breathing: Fresh air

Respirator Recommendations
Not available.
Important additional information about respirator selection
Exposure Routes
inhalation, skin and/or eye contact
Symptoms
Irritation eyes, skin, nose, throat; cough
Target Organs
Eyes, skin, respiratory system
See also: INTRODUCTION