NIOSH Pocket Guide to Chemical Hazards

Octachloronaphthalene CAS 2234-13-1
C10Cl8 RTECS QK0250000
Synonyms & Trade Names
Halowax® 1051; 1,2,3,4,5,6,7,8-Octachloronaphthalene; Perchloronaphthalene
DOT ID & Guide
NIOSH REL: TWA 0.1 mg/m3 ST 0.3 mg/m3 [skin]
OSHA PEL†: TWA 0.1 mg/m3 [skin]
IDLH Unknown Conversion
Physical Description
Waxy, pale-yellow solid with an aromatic odor.
MW: 403.7
BP: 770°F
MLT: 365°F
Sol: Insoluble
VP: <1 mmHg
IP: ?

Sp.Gr: 2.00
Fl.P: NA

Noncombustible Solid
Incompatibilities & Reactivities
Strong oxidizers
Measurement Methods
NIOSH S97 (II-2)
Personal Protection & Sanitation
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: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA
Up to 1 mg/m3: (APF = 10) Any supplied-air respirator/(APF = 50) Any self-contained breathing apparatus 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; liver damage, jaundice
Target Organs Skin, liver