NIOSH Pocket Guide to Chemical Hazards

Trichloronaphthalene CAS 1321-65-9
C10H5Cl3 RTECS QK4025000
Synonyms & Trade Names
Halowax®, Nibren wax, Seekay wax
DOT ID & Guide
NIOSH REL: TWA 5 mg/m3 [skin]
OSHA PEL: TWA 5 mg/m3 [skin]
IDLH Unknown Conversion
Physical Description
Colorless to pale-yellow solid with an aromatic odor.
MW: 231.5
BP: 579-669°F
MLT: 199°F
Sol: Insoluble
VP: <1 mmHg
IP: ?

Sp.Gr: 1.58
Fl.P(oc): 392°F
UEL: ?
LEL: ?

Combustible Solid
Incompatibilities & Reactivities
Strong oxidizers
Measurement Methods
NIOSH S128 (II-2)
Personal Protection & Sanitation
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily

First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA
Up to 50 mg/m3: (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 (gas mask) with a chin-style, front- or back-mounted organic vapor canister having a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Anorexia, nausea; dizziness; jaundice, liver injury
Target Organs Liver