NIOSH Pocket Guide to Chemical Hazards

Di-sec octyl phthalate

CAS 117-81-7


RTECS TI0350000
Synonyms & Trade Names
DEHP, Di(2-ethylhexyl)phthalate, DOP, bis-(2-Ethylhexyl)phthalate, Octyl phthalate
DOT ID & Guide


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] See: 117817 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
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
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
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 with 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, 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   See ICSC CARD: 0271