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Acetaldehyde

Synonyms & Trade Names
Acetic aldehyde, Ethanal, Ethyl aldehyde
CAS No.
75-07-0
RTECS No.
AB1925000
DOT ID & Guide
1089 129
Formula
CH3CHO
Conversion
1 ppm = 1.80 mg/m3
IDLH
Ca [2000 ppm]
See: 75070
Exposure Limits
NIOSH REL
: Ca See Appendix A See Appendix C (Aldehydes)
OSHA PEL
†: TWA 200 ppm (360 mg/m3)
Measurement Methods

NIOSH 2018 , 2538 , 3507;
OSHA 68
See: NMAM or OSHA Methods
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.]
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]
Personal Protection/Sanitation
(See protection codes)
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

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 0009   See MEDICAL TESTS: 0001
 

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