NIOSH Pocket Guide to Chemical Hazards


CAS 57-74-9


RTECS PB9800000
Synonyms & Trade Names
Chlordan; Chlordano; 1,2,4,5,6,7,8,8-Octachloro-3a,4,7,7a-tetrahydro-4,7-methanoindane
DOT ID & Guide
2762 131


NIOSH REL: Ca TWA 0.5 mg/m3 [skin] See Appendix A
OSHA PEL: TWA 0.5 mg/m3 [skin]
IDLH Ca [100 mg/m3] See: 57749 Conversion
Physical Description
Amber-colored, viscous liquid with a pungent, chlorine-like odor. [insecticide]
MW: 409.8
BP: Decomposes
FRZ: 217-228°F
Sol: 0.0001%
VP: 0.00001 mmHg
IP: ?

Sp.Gr(77°F): 1.6
Fl.P: NA

Noncombustible Liquid, but may be utilized in flammable solutions.
Incompatibilities & Reactivities
Strong oxidizers, alkaline reagents
Measurement Methods
NIOSH 5510; OSHA 67
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
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
Important additional information about respirator selection
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
(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
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Blurred vision; confusion; ataxia, delirium; cough; abdominal pain, nausea, vomiting, diarrhea; irritability, tremor, convulsions; anuria; in animals: lung, liver, kidney damage; [potential occupational carcinogen]
Target Organs central nervous system, eyes, lungs, liver, kidneys

Cancer Site [in animals: liver cancer]
See also: INTRODUCTION   See ICSC CARD: 0740   See MEDICAL TESTS: 0042