Acetic acid |
Synonyms & Trade Names Acetic acid (aqueous), Ethanoic acid, Glacial acetic acid (pure compound), Methanecarboxylic acid [Note: Can be found in concentrations of 5-8% in vinegar.] |
CAS No. 64-19-7 |
RTECS No. AF1225000 |
DOT ID & Guide 2790 153 (10-80% acid)
2789 132 (>80% acid) |
FormulaCH3COOH |
Conversion 1 ppm = 2.46 mg/m3 |
IDLH 50 ppm
See: 64197 |
Exposure Limits NIOSH REL: TWA 10 ppm (25 mg/m3) ST 15 ppm (37 mg/m3)
OSHA PEL: TWA 10 ppm (25 mg/m3) |
Measurement Methods
NIOSH 1603;
OSHA ID186SG
See: NMAM or OSHA Methods |
Physical Description Colorless liquid or crystals with a sour, vinegar-like odor. [Note: Pure compound is a solid below 62°F. Often used in an aqueous solution.] |
MW: 60.1 |
BP: 244°F |
FRZ: 62°F |
Sol: Miscible |
VP: 11 mmHg |
IP: 10.66 eV |
Sp.Gr: 1.05 |
Fl.P: 103°F |
UEL(200°F): 19.9% |
LEL: 4.0% |
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| Class II Combustible Liquid: Fl.P. at or above 100°F and below 140°F. |
Incompatibilities & Reactivities Strong oxidizers (especially chromic acid, sodium peroxide & nitric acid), strong caustics [Note: Corrosive to metals.] |
Exposure Routes inhalation, skin and/or eye contact |
Symptoms irritation eyes, skin, nose, throat; eye, skin burns; skin sensitization; dental erosion; black skin, hyperkeratosis; conjunctivitis, lacrimation (discharge of tears); pharyngeal edema, chronic bronchitis |
Target Organs Eyes, skin, respiratory system, teeth |
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Personal Protection/Sanitation (See protection codes)
Skin: Prevent skin contact (>10%)
Eyes: Prevent eye contact
Wash skin: When contaminated (>10%)
Remove: When wet or contaminated (>10%)
Change: No recommendation
Provide: Eyewash (>5%), Quick drench (>50%) |
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately |
Respirator Recommendations NIOSH/OSHA Up to 50 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode£
(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)£
(APF = 50) Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s)
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator 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
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 0363
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