NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

Dinitro-o-cresol

CAS
534-52-1

CH3C6H2OH(NO2)2

RTECS
GO9625000
Synonyms & Trade Names

4,6-Dinitro-o-cresol; 3,5-Dinitro-2-hydroxytoluene; 4,6-Dinitro-2-methyl phenol; DNC; DNOC
DOT ID & Guide
1598 / 153

Exposure
Limits

NIOSH REL: TWA 0.2 mg/m3 [skin]
OSHA PEL: TWA 0.2 mg/m3 [skin]
IDLH
5 mg/m3 See: 534521
Conversion
Physical Description
Yellow, odorless solid. [insecticide]
MW: 198.1
BP: 594°F
MLT: 190°F
Sol: 0.01%
VP: 0.00005 mmHg
IP: ?

Sp.Gr: 1.1 (estimated)
Fl.P: NA
UEL: NA
LEL: NA
MEC: 30 g/m3
Noncombustible Solid
Incompatibilities & Reactivities

Strong oxidizers
Measurement Methods
NIOSH S166 (II-5)
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 immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations
NIOSH/OSHA
Up to 2 mg/m3:
(APF = 10) Any air-purifying full-facepiece respirator equipped with an N95, R95, or P95 filter. The following filters may also be used: N99, R99, P99, N100, R100, P100. Click here for information on selection of N, R, or P filters.
Up to 5 mg/m3:
(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters.
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
(APF = 25) Any powered air-purifying respirator with a high-efficiency particulate filter.
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece
Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
Escape:
(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters./Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
Sense of well being; headache, fever, lassitude (weakness, exhaustion), profuse sweating, excess thirst, tachycardia, hyperpnea, cough, shortness breath, coma
Target Organs
cardiovascular system, endocrine system
See also: INTRODUCTION   See MEDICAL TESTS: 0087