NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

2,2-Dichloropropionic acid

CAS
75-99-0

CH3CCl2COOH

RTECS
UF0690000
Synonyms & Trade Names

Dalapon; 2,2-Dichloropropanoic acid; alpha,alpha-Dichloropropionic acid
DOT ID & Guide

Exposure
Limits

NIOSH REL: TWA 1 ppm (6 mg/m3)
OSHA PEL: none
IDLH
N.D. See: IDLH INDEX
Conversion
1 ppm = 5.85 mg/m3
Physical Description
Colorless liquid with an acrid odor. [herbicide] [Note: A white to tan powder below 46°F. The sodium salt, a white powder, is often used.]
MW: 143.0
BP: 374°F
FRZ: 46°F
Sol: 50%
VP: ?
IP: ?

Sp.Gr: 1.40
Fl.P: NA
UEL: NA
LEL: NA

Noncombustible Liquid
Incompatibilities & Reactivities

Metals [Note: Very corrosive to aluminum & copper alloys. Reacts slowly in water to form hydrochloric & pyruvic acids.]
Measurement Methods
OSHA PV2017
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: No recommendation
Provide: Eyewash, Quick drench
First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Water wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations
Not available.
Important additional information about respirator selection
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
Irritation eyes, skin, upper respiratory system; skin burns; lassitude (weakness, exhaustion), loss of appetite, diarrhea, vomiting, slowing of pulse; central nervous system depression
Target Organs
Eyes, skin, respiratory system, gastrointestinal tract, central nervous system
See also: INTRODUCTION