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Methylal |
CAS 109-87-5 | ||
CH3OCH2OCH3 |
RTECS PA8750000 | ||
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Synonyms & Trade Names Dimethoxymethane, Formal, Formaldehyde dimethylacetal, Methoxymethyl methyl ether, Methylene dimethyl ether |
DOT ID & Guide 1234 127 |
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Exposure
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NIOSH REL: TWA 1000 ppm (3100 mg/m3) | ||
| OSHA PEL: TWA 1000 ppm (3100 mg/m3) | |||
| IDLH 2200 ppm [10%LEL] See: 109875 | 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 |
BP: 111°F |
FRZ: -157°F |
Sol: 33% |
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VP: 330 mmHg |
IP: 10.00 eV |
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Sp.Gr: 0.86 |
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Fl.P(oc): -26°F |
UEL: 13.8% |
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 |
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Personal Protection & Sanitation (See protection) Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet (flammable) Change: No recommendation |
First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush promptly Breathing: Respiratory support Swallow: Medical attention immediately |
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Important additional information about respirator selection 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 |
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| Exposure Routes inhalation, ingestion, skin and/or eye contact | |
| 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 |