# NIOSH Pocket Guide to Chemical Hazards
Tetrachloronaphthalene | CAS 1335-88-2
C10H4Cl4 | RTECS QK3700000
Synonyms & Trade Names Halowax®, Nibren wax, Seekay wax | DOT ID & Guide
Exposure Limits | NIOSH REL: TWA 2 mg/m3 [skin]
OSHA PEL: TWA 2 mg/m3 [skin]
IDLH Unknown | Conversion
Physical Description Colorless to pale-yellow solid with an aromatic odor.
MW: 265.9 | BP: 599-680°F | MLT: 360°F | Sol: Insoluble
VP: <1 mmHg | IP: ? |  | Sp.Gr: 1.59-1.65
Fl.P(oc): 410°F | UEL: ? | LEL: ? |
Combustible Solid
Incompatibilities & Reactivities Strong oxidizers
Measurement Methods NIOSH S130 (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 immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA Up to 20 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 Acne-form dermatitis; headache, lassitude (weakness, exhaustion), anorexia, dizziness; jaundice, liver injury
Target Organs Liver, skin, central nervous system
See also: INTRODUCTION