# NIOSH Pocket Guide to Chemical Hazards
Di-sec octyl phthalate | CAS 117-81-7
C24H38O4 | RTECS TI0350000
Synonyms & Trade Names DEHP, Di(2-ethylhexyl)phthalate, DOP, bis-(2-Ethylhexyl)phthalate, Octyl phthalate | DOT ID & Guide
Exposure Limits | NIOSH REL: Ca TWA 5 mg/m3 ST 10 mg/m3 See Appendix A
OSHA PEL†: TWA 5 mg/m3
IDLH Ca [5000 mg/m3] | Conversion
Physical Description Colorless, oily liquid with a slight odor.
MW: 390.5 | BP: 727°F | FRZ: -58°F | Sol(75°F): 0.00003%
VP: <0.01 mmHg | IP: ? |  | Sp.Gr: 0.99
Fl.P(oc): 420°F | UEL: ? | LEL(474°F): 0.3% |
Class IIIB Combustible Liquid: Fl.P. at or above 200°F.
Incompatibilities & Reactivities Nitrates; strong oxidizers, acids & alkalis
Measurement Methods NIOSH 5020
Personal Protection & Sanitation Skin: No recommendation Eyes: No recommendation Wash skin: No recommendation Remove: No recommendation Change: No recommendation | First Aid (See procedures) Eye: Irrigate 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 with a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, mucous membrane; in animals: liver damage; teratogenic effects; [potential occupational carcinogen]
Target Organs Eyes, respiratory system, central nervous system, liver, reproductive system, gastrointestinal tract Cancer Site [in animals: liver tumors]
See also: INTRODUCTION