NIOSH logo and tagline

Chlorodiphenyl (42% chlorine)

Related Pages
Synonyms & Trade Names
Aroclor® 1242, PCB [Chlorodiphenyl (42% chlorine)], Polychlorinated biphenyl [Chlorodiphenyl (42% chlorine)]
CAS No.
53469-21-9
RTECS No.
TQ1356000
DOT ID & Guide
2315 171
Formula
C₆H₄ClC₆H₃Cl₂ (approx)
Conversion
IDLH
Ca [5 mg/m3]
See: 53469219
Exposure Limits
NIOSH REL
Ca TWA 0.001 mg/m3 See Appendix A [*Note: The REL also applies to other PCBs.]
OSHA PEL
TWA 1 mg/m3 [skin]
Measurement Methods
NIOSH 5503;
OSHA PV2089
See: NMAM or OSHA Methods
Physical Description
Colorless to light-colored, viscous liquid with a mild, hydrocarbon odor.
Molecular Weight
258 (approx)
Boiling Point
617-691°F
Freezing Point
-2°F
Solubility
Insoluble
Vapor Pressure
0.001 mmHg
Ionization Potential
?
Specific Gravity
(77°F): 1.39
Flash Point
NA
Upper Explosive Limit
NA
Lower Explosive Limit
NA
Nonflammable Liquid, but exposure in a fire results in the formation of a black soot containing PCBs, polychlorinated dibenzofurans & chlorinated dibenzo-p-dioxins.
Incompatibilities & Reactivities
Strong oxidizers
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation eyes; chloracne; liver damage; reproductive effects; [potential occupational carcinogen]
Target Organs
Skin, eyes, liver, reproductive system
Cancer Site
[in animals: tumors of the pituitary gland & liver, leukemia]
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Change:Daily
Provide:Eyewash, Quick drench
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH

At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(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 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

See also
INTRODUCTION   MEDICAL TESTS: 0175
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health