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| Formaldehyde | CAS 50-00-0 | ||
| HCHO | RTECS LP8925000 | ||
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Synonyms & Trade Names Methanal, Methyl aldehyde, Methylene oxide |
DOT ID & Guide |
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Exposure Limits |
NIOSH REL: Ca TWA 0.016 ppm C 0.1 ppm [15-minute] See Appendix A | ||
| OSHA PEL: [1910.1048] TWA 0.75 ppm ST 2 ppm | |||
| IDLH Ca [20 ppm] | Conversion 1 ppm = 1.23 mg/m3 | ||
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Physical Description Nearly colorless gas with a pungent, suffocating odor. [Note: Often used in an aqueous solution (see specific listing for Formalin).] |
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MW: 30.0 |
BP: -6°F |
FRZ: -134°F |
Sol: Miscible |
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VP: >1 atm |
IP: 10.88 eV |
RGasD: 1.04 |
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Fl.P: NA (Gas) |
UEL: 73% |
LEL: 7.0% |
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| Flammable Gas | |||
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Incompatibilities & Reactivities Strong oxidizers, alkalis & acids; phenols; urea [Note: Pure formaldehyde has a tendency to polymerize. Reacts with HCl to form bis-Chloromethyl ether.] |
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Measurement Methods NIOSH 2016, 2541, 3500, 3800; OSHA ID205, 52 |
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Personal Protection & Sanitation Skin: No recommendation Eyes: Prevent eye contact Wash skin: No recommendation Remove: No recommendation Change: No recommendation |
First Aid (See procedures) Eye: Irrigate immediately Breathing: Respiratory support |
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Respirator Recommendations
NIOSH At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration: (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 canister providing protection against the compound of concern/Any appropriate escape-type, self-contained breathing apparatus |
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| Exposure Routes inhalation, skin and/or eye contact | |
| Symptoms Irritation eyes, nose, throat, respiratory system; lacrimation (discharge of tears); cough; wheezing; [potential occupational carcinogen] | |
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Target Organs
Eyes, respiratory system Cancer Site [nasal cancer] |
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| See also: INTRODUCTION |