# NIOSH Pocket Guide to Chemical Hazards
Dieldrin | CAS 60-57-1
C12H8Cl6O | RTECS IO1750000
Synonyms & Trade Names HEOD; 1,2,3,4,10,10-Hexachloro-6,7-epoxy-1,4,4a,5,6,7,8,8a-octahydro-1,4-endo,exo-5,8-dimethanonaphthalene | 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 [50 mg/m3] | Conversion
Physical Description Colorless to light-tan crystals with a mild, chemical odor. [insecticide]
MW: 380.9 | BP: Decomposes | MLT: 349°F | Sol: 0.02%
VP(77°F): 8 x 10-7 mmHg | IP: ? |  | Sp.Gr: 1.75
Fl.P: NA | UEL: NA | LEL: NA |
Noncombustible Solid
Incompatibilities & Reactivities Strong oxidizers, active metals such as sodium, strong acids, phenols
Measurement Methods NIOSH S283 (II-3)
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), sweating; myoclonic limb jerks; clonic, tonic convulsions; coma; [potential occupational carcinogen]; in animals: liver, kidney damage
Target Organs central nervous system, liver, kidneys, skin Cancer Site [in animals: lung, liver, thyroid & adrenal gland tumors]
See also: INTRODUCTION