Formaldehyde
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CAS
50-00-0
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HCHO
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RTECS
LP8925000
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Synonyms & Trade Names
Methanal, Methyl aldehyde, Methylene oxide
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DOT ID & Guide
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Exposure
Limits
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NIOSH REL: Ca TWA 0.016 ppm C 0.1 ppm [15-minute] See Appendix A
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OSHA PEL: [1910.1048] TWA 0.75 ppm ST 2 ppm
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IDLH
Ca [20 ppm]
See: 50000
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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
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BP: -6°F
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FRZ: -134°F
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Sol: Miscible
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VP: >1 atm
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IP: 10.88 eV
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RGasD: 1.04
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Fl.P: NA (Gas)
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UEL: 73%
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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
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: No recommendation
Eyes: Prevent eye contact
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation
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First Aid (See procedures)
Eye: Irrigate immediately
Breathing: Respiratory support
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Respirator Recommendations (See Appendix E)
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
Important additional information about respirator selection
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Exposure Routes
inhalation, skin and/or eye contact
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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
See ICSC CARD: 0275 See MEDICAL TESTS: 0110
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