# NIOSH Pocket Guide to Chemical Hazards
Dibutyl phthalate | CAS 84-74-2
C6H4(COOC4H9)2 | RTECS TI0875000
Synonyms & Trade Names DBP; Dibutyl 1,2-benzene-dicarboxylate; Di-n-butyl phthalate | DOT ID & Guide
Exposure Limits | NIOSH REL: TWA 5 mg/m3
OSHA PEL: TWA 5 mg/m3
IDLH 4000 mg/m3 | Conversion 1 ppm = 11.57 mg/m3
Physical Description Colorless to faint-yellow, oily liquid with a slight, aromatic odor.
MW: 278.3 | BP: 644°F | FRZ: -31°F | Sol(77°F): 0.001%
VP: 0.00007 mmHg | IP: ? |  | Sp.Gr: 1.05
Fl.P: 315°F | UEL: ? | LEL(456°F): 0.5% |
Class IIIB Combustible Liquid: Fl.P. at or above 200°F.
Incompatibilities & Reactivities Nitrates; strong oxidizers, alkalis & acids; liquid chlorine
Measurement Methods NIOSH 5020; OSHA 104
Personal Protection & Sanitation Skin: No recommendation Eyes: Prevent eye contact 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 NIOSH/OSHA Up to 50 mg/m3: (APF = 10) Any dust and mist respirator with a full facepiece Up to 125 mg/m3: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode£/(APF = 25) Any powered, air-purifying respirator with a dust and mist filter£ Up to 250 mg/m3: (APF = 50) Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter/(APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece Up to 4000 mg/m3: (APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode Emergency or planned entry into unknown concentrations or IDLH conditions: (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, upper respiratory system, stomach
Target Organs Eyes, respiratory system, gastrointestinal tract
See also: INTRODUCTION