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Formic acid |
CAS 64-18-6 | ||
HCOOH |
RTECS LQ4900000 | ||
Synonyms & Trade Names Formic acid (85-95% in aqueous solution); Hydrogen carboxylic acid; Methanoic acid |
DOT ID & Guide 1779 153 |
Exposure
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NIOSH REL: TWA 5 ppm (9 mg/m3) | ||
OSHA PEL: TWA 5 ppm (9 mg/m3) | |||
IDLH 30 ppm See: 64186 | Conversion 1 ppm = 1.88 mg/m3 |
Physical Description Colorless liquid with a pungent, penetrating odor. [Note: Often used in an aqueous solution.] |
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MW: 46.0 |
BP: 224°F (90% solution) |
FRZ: 20°F (90% solution) |
Sol: Miscible |
VP: 35 mmHg |
IP: 11.05 eV |
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Sp.Gr: 1.22 (90% solution) |
Fl.P(oc): 122°F (90% solution) |
UEL: 57% (90% solution) |
LEL: 18% (90% solution) |
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Class II Combustible Liquid (90% solution) | |||
Incompatibilities & Reactivities Strong oxidizers, strong caustics, concentrated sulfuric acid [Note: Corrosive to metals.] |
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 |
First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately |
Important additional information about respirator selection 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 |
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Exposure Routes inhalation, ingestion, skin and/or eye contact | |
Symptoms Irritation eyes; skin, throat; skin burns, dermatitis; lacrimation (discharge of tears); rhinorrhea (discharge of thin mucus); cough, dyspnea (breathing difficulty); nausea | |
Target Organs
Eyes, skin, respiratory system |
See also: INTRODUCTION See ICSC CARD: 0485 |