# NIOSH Pocket Guide to Chemical Hazards
Aldrin | CAS 309-00-2
C12H8Cl6 | RTECS IO2100000
Synonyms & Trade Names 1,2,3,4,10,10-Hexachloro-1,4,4a,5,8,8a-hexahydro-endo-1,4-exo-5,8-dimethanonaphthalene; HHDN; Octalene | DOT ID & Guide 2761 151
Exposure Limits | NIOSH REL: Ca TWA 0.25 mg/m3 [skin] See Appendix A
OSHA PEL: TWA 0.25 mg/m3 [skin]
IDLH Ca [25 mg/m3] | Conversion
Physical Description Colorless to dark-brown crystalline solid with a mild chemical odor. [Note: Formerly used as an insecticide.]
MW: 364.9 | BP: Decomposes | MLT: 219°F | Sol: 0.003%
VP: 0.00008 mmHg | IP: ? |  | Sp.Gr: 1.60
Fl.P: NA | UEL: NA | LEL: NA |
Noncombustible Solid, but may be dissolved in flammable liquids.
Incompatibilities & Reactivities Concentrated mineral acids, active metals, acid catalysts, acid oxidizing agents, phenol
Measurement Methods NIOSH 5502
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated/Daily 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 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 Headache, dizziness; nausea, vomiting, malaise (vague feeling of discomfort); myoclonic jerks of limbs; clonic, tonic convulsions; coma; hematuria (blood in the urine), azotemia; [potential occupational carcinogen]
Target Organs central nervous system, liver, kidneys, skin Cancer Site [in animals: tumors of the lungs, liver, thyroid & adrenal glands]
See also: INTRODUCTION