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Dimethylphthalate

Synonyms & Trade Names
Dimethyl ester of 1,2-benzenedicarboxylic acid, DMP
CAS No.
131-11-3
RTECS No.
TI1575000
DOT ID & Guide
Formula
C₆H₄(COOCH₃)₂
Conversion
IDLH
2000 mg/m3
See: 131113
Exposure Limits
NIOSH REL
TWA 5 mg/m3
OSHA PEL
TWA 5 mg/m3
Measurement Methods
OSHA 104
See: NMAM or OSHA Methods
Physical Description
Colorless, oily liquid with a slight, aromatic odor. [Note: A solid below 42°F.]
Molecular Weight
194.2
Boiling Point
543°F
Freezing Point
42°F
Solubility
0.4%
Vapor Pressure
0.01 mmHg
Ionization Potential
9.64 eV
Specific Gravity
1.19
Flash Point
295°F
Upper Exposive Limit
?
Lower Explosive Limit
(358°F): 0.9%
Class IIIB Combustible Liquid: Fl.P. at or above 200°F.; however, ignition is difficult.
Incompatibilities & Reactivities
Nitrates; strong oxidizers, alkalis & acids
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, upper respiratory system; stomach pain
Target Organs
Eyes, respiratory system, gastrointestinal tract
Personal Protection/Sanitation
(See protection codes)
Skin:No recommendation
Eyes:Prevent eye contact
Wash skin:No recommendation
Remove:No recommendation
Change:No recommendation
First Aid
(See procedures)
Eye:Irrigate promptly
Skin:Wash regularly
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH/OSHA

Up to 50 mg/m3:
(APF = 10) Any air-purifying full-facepiece respirator equipped with an N95, R95, or P95 filter. The following filters may also be used: N99, R99, P99, N100, R100, P100.
Click here for information on selection of N, R, or P filters.

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 high-efficiency particulate filter.£

Up to 250 mg/m3:
(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.
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece

Up to 2000 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 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

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0261

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