Acetaldehyde

NIOSH Pocket Guide to Chemical Hazards Acetaldehyde CAS 75-07-0 CH3CHO RTECS AB1925000 Synonyms & Trade Names Acetic aldehyde, Ethanal, Ethyl aldehyde DOT ID & Guide 1089 129 Exposure Limits NIOSH REL: Ca See Appendix A See Appendix C (Aldehydes) OSHA PEL†: TWA 200 ppm (360 mg/m3) IDLH Ca [2000 ppm] Conversion 1 ppm = 1.80 mg/m3 Physical Description Colorless liquid or gas (above 69°F) with a pungent, fruity odor. MW: 44.1 BP: 69°F FRZ: -190°F Sol: Miscible VP: 740 mmHg IP: 10.22 eV Sp.Gr: 0.79 Fl.P: -36°F UEL: 60% LEL: 4.0% Class IA Flammable Liquid: Fl.P. below 73°F and BP below 100°F. Incompatibilities & Reactivities Strong oxidizers, acids, bases, alcohols, ammonia & amines, phenols, ketones, HCN, H2S [Note: Prolonged contact with air may cause formation of peroxides that may explode and burst containers; easily undergoes polymerization.] Measurement Methods NIOSH 2538; OSHA 68 Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet (flammable) Change: No recommendation Provide: Eyewash, Quick drench First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush promptly Breathing: Respiratory support Swallow: Medical attention immediately Respirator Recommendations 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 organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus Exposure Routes inhalation, ingestion, skin and/or eye contact Symptoms Irritation eyes, nose, throat; eye, skin burns; dermatitis; conjunctivitis; cough; central nervous system depression; delayed pulmonary edema; in animals: kidney, reproductive, teratogenic effects; [potential occupational carcinogen] Target Organs Eyes, skin, respiratory system, kidneys, central nervous system, reproductive system Cancer Site [in animals: nasal cancer] See also: INTRODUCTION