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| Phthalic anhydride | CAS 85-44-9 | ||
| C6H4(CO)2O | RTECS TI3150000 | ||
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Synonyms & Trade Names 1,2-Benzenedicarboxylic anhydride; PAN; Phthalic acid anhydride |
DOT ID & Guide 2214 156 |
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Exposure Limits |
NIOSH REL: TWA 6 mg/m3 (1 ppm) | ||
| OSHA PEL�: TWA 12 mg/m3 (2 ppm) | |||
| IDLH 60 mg/m3 | Conversion 1 ppm = 6.06 mg/m3 | ||
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Physical Description White solid (flake) or a clear, colorless, mobile liquid (molten) with a characteristic, acrid odor. |
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MW: 148.1 |
BP: 563°F |
MLT: 267°F |
Sol: 0.6% |
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VP: 0.0015 mmHg |
IP: 10.00 eV |
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Sp.Gr: 1.53 (Flake) 1.20 (Molten) |
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Fl.P: 305°F |
UEL: 10.5% |
LEL: 1.7% |
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| Combustible Solid | |||
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Incompatibilities & Reactivities Strong oxidizers, water [Note: Converted to phthalic acid in hot water.] |
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Measurement Methods NIOSH S179 (II-3); OSHA 90 |
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Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: Daily |
First Aid (See procedures) Eye: Irrigate immediately Skin: Soap wash promptly Breathing: Respiratory support Swallow: Medical attention immediately |
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Respirator Recommendations
NIOSH Up to 30 mg/m3: (APF = 5) Any dust and mist respirator* Up to 60 mg/m3: (APF = 10) Any dust and mist respirator except single-use and quarter-mask respirators*/(APF = 50) Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter/(APF = 25) Any powered, air-purifying respirator with a dust and mist filter*/(APF = 10) Any supplied-air respirator*/(APF = 50) Any self-contained breathing apparatus with a full facepiece 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 |
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| Exposure Routes inhalation, ingestion, skin and/or eye contact | |
| Symptoms Irritation eyes, skin, upper respiratory system; conjunctivitis; nasal ulcer bleeding; bronchitis, bronchial asthma; dermatitis; in animals: liver, kidney damage | |
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Target Organs
Eyes, skin, respiratory system, liver, kidneys |
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| See also: INTRODUCTION |