Methylal
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CAS
109-87-5
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CH3OCH2OCH3
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RTECS
PA8750000
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Synonyms & Trade Names
Dimethoxymethane, Formal, Formaldehyde dimethylacetal, Methoxymethyl methyl ether, Methylene dimethyl ether
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DOT ID & Guide
1234 / 127
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Exposure
Limits
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NIOSH REL: TWA 1000 ppm (3100 mg/m3)
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OSHA PEL: TWA 1000 ppm (3100 mg/m3)
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IDLH
2200 ppm [10%LEL]
See: 109875
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Conversion
1 ppm = 3.11 mg/m3
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Physical Description
Colorless liquid with a chloroform-like odor.
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MW: 76.1
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BP: 111°F
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FRZ: -157°F
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Sol: 33%
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VP: 330 mmHg
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IP: 10.00 eV
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Sp.Gr: 0.86
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Fl.P(oc): -26°F
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UEL: 13.8%
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LEL: 2.2%
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Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
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Incompatibilities & Reactivities
Strong oxidizers, acids
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Measurement Methods
NIOSH 1611
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet (flammable)
Change: No recommendation
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
NIOSH/OSHA
Up to 2200 ppm:
(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 (gas mask) with a chin-style, front- or back-mounted organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
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Exposure Routes
inhalation, ingestion, skin and/or eye contact
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Symptoms
Irritation eyes, skin, upper respiratory system; anesthesia
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Target Organs
Eyes, skin, respiratory system, central nervous system
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See also: INTRODUCTION
See ICSC CARD: 1152 |
