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Maleic anhydride |
CAS 108-31-6 |
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C4H2O3
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RTECS ON3675000 |
Synonyms & Trade Names
cis-Butenedioic anhydride; 2,5-Furanedione; Maleic acid anhydride;
Toxilic anhydride |
DOT ID & Guide
2215 156 |
Exposure
Limits |
NIOSH REL: TWA 1 mg/m3 (0.25
ppm) |
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OSHA PEL: TWA 1 mg/m3 (0.25 ppm)
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IDLH 10 mg/m3
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Conversion 1 ppm = 4.01 mg/m3
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Physical Description
Colorless needles, white lumps, or pellets with an irritating,
choking odor. |
MW: 98.1
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BP: 396°F
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MLT: 127°F
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Sol: Reacts
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VP: 0.2 mmHg
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IP: 9.90 eV
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Sp.Gr: 1.48
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Fl.P: 218°F
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UEL: 7.1%
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LEL: 1.4%
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Combustible Solid, but may be difficult to
ignite. |
Incompatibilities & Reactivities
Strong oxidizers, water, alkalis, metals, caustics & amines above
150°F [Note: Reacts slowly with water (hydrolyzes) to form maleic acid.]
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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: No recommendation
Provide: Eyewash
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First Aid
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations NIOSH/OSHA
Up to 10 mg/m3: (APF = 25) Any supplied-air
respirator operated in a continuous-flow mode£/(APF = 50)
Any self-contained breathing apparatus with a full facepiece/(APF =
50) Any supplied-air respirator 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 (gas mask) with a chin-style, front- or back-mounted
organic vapor canister having 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 |
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Symptoms Irritation nose, upper
respiratory system; conjunctivitis; photophobia (abnormal visual
intolerance to light), double vision; bronchial asthma; dermatitis
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Target Organs Eyes, skin,
respiratory system
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