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| Acetic acid | CAS 64-19-7 | ||
| CH3COOH | RTECS AF1225000 | ||
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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.] |
DOT ID & Guide 2790 153 (10-80% acid) 2789 132 (>80% acid) |
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Exposure Limits |
NIOSH REL: TWA 10 ppm (25 mg/m3) ST 15 ppm (37 mg/m3) | ||
| OSHA PEL: TWA 10 ppm (25 mg/m3) | |||
| IDLH 50 ppm | Conversion 1 ppm = 2.46 mg/m3 | ||
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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.] |
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MW: 60.1 |
BP: 244°F |
FRZ: 62°F |
Sol: Miscible |
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VP: 11 mmHg |
IP: 10.66 eV |
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Sp.Gr: 1.05 |
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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. | |||
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Incompatibilities & Reactivities Strong oxidizers (especially chromic acid, sodium peroxide & nitric acid), strong caustics [Note: Corrosive to metals.] |
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Measurement Methods NIOSH 1603; OSHA ID186SG |
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Personal Protection & Sanitation 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 |
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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 |
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| 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 | |
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Target Organs
Eyes, skin, respiratory system, teeth |
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| See also: INTRODUCTION |