# NIOSH Pocket Guide to Chemical Hazards
Diethyl phthalate | CAS 84-66-2
C6H4(COOC2H5)2 | RTECS TI1050000
Synonyms & Trade Names DEP, Diethyl ester of phthalic acid, Ethyl phthalate | DOT ID & Guide
Exposure Limits | NIOSH REL: TWA 5 mg/m3
OSHA PEL†: none
IDLH N.D. | Conversion
Physical Description Colorless to water-white, oily liquid with a very slight, aromatic odor. [pesticide]
MW: 222.3 | BP: 563°F | FRZ: -41°F | Sol(77°F): 0.1%
VP(77°F): 0.002 mmHg | IP: ? |  | Sp.Gr: 1.12
Fl.P(oc): 322°F | UEL: ? | LEL(368°F): 0.7% |
Class IIIB Combustible Liquid; however, ignition is difficult.
Incompatibilities & Reactivities Strong oxidizers, strong acids, nitric acid, permanganates, water
Measurement Methods OSHA 104
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 Skin: Wash regularly Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, nose, throat; headache, dizziness, nausea; lacrimation (discharge of tears); possible polyneuropathy, vestibular dysfunc; pain, numbness, lassitude (weakness, exhaustion), spasms in arms & legs; in animals: reproductive effects
Target Organs Eyes, skin, respiratory system, central nervous system, peripheral nervous system, reproductive system
See also: INTRODUCTION