Formic acid
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CAS
64-18-6
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HCOOH
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RTECS
LQ4900000
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Synonyms & Trade Names
Formic acid (85-95% in aqueous solution); Hydrogen carboxylic acid; Methanoic acid
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DOT ID & Guide
1779 / 153
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Exposure
Limits
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NIOSH REL: TWA 5 ppm (9 mg/m3)
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OSHA PEL: TWA 5 ppm (9 mg/m3)
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IDLH
30 ppm
See: 64186
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Conversion
1 ppm = 1.88 mg/m3
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Physical Description
Colorless liquid with a pungent, penetrating odor. [Note: Often used in an aqueous solution.]
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MW: 46.0
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BP: 224°F (90% solution)
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FRZ: 20°F (90% solution)
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Sol: Miscible
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VP: 35 mmHg
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IP: 11.05 eV
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Sp.Gr: 1.22 (90% solution)
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Fl.P(oc): 122°F (90% solution)
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UEL: 57% (90% solution)
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LEL: 18% (90% solution)
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Class II Combustible Liquid (90% solution)
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Incompatibilities & Reactivities
Strong oxidizers, strong caustics, concentrated sulfuric acid [Note: Corrosive to metals.]
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Measurement Methods
NIOSH 2011; OSHA ID186SG
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 or contaminated
Change: No recommendation
Provide: Eyewash, Quick drench
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
NIOSH/OSHA
Up to 30 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 having an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters./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, throat; skin burns, dermatitis; lacrimation (discharge of tears); rhinorrhea (discharge of thin mucus); cough, dyspnea (breathing difficulty); nausea
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Target Organs
Eyes, skin, respiratory system
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See also: INTRODUCTION
See ICSC CARD: 0485 |
