NIOSH Pocket Guide to Chemical Hazards

Malonaldehyde CAS 542-78-9
Synonyms & Trade Names
Malonic aldehyde; Malonodialdehyde; Propanedial; 1,3-Propanedial [Note: Pure Malonaldehyde is unstable and may be used as its sodium salt.]
DOT ID & Guide
NIOSH REL: Ca See Appendix A See Appendix C (Aldehydes)
OSHA PEL: none
IDLH Ca [N.D.] Conversion
Physical Description
Solid (needles).
MW: 72.1
BP: ?
MLT: 161°F
Sol: ?
VP: ?
IP: ?

Sp.Gr: ?
Fl.P: ?
UEL: ?
LEL: ?

Incompatibilities & Reactivities
Proteins [Note: Pure compound is stable under neutral conditions, but not under acidic conditions.]
Measurement Methods
None available
Personal Protection & Sanitation
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated/Daily
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
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, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, respiratory system; central nervous system depression; [potential occupational carcinogen]
Target Organs Eyes, skin, respiratory system, central nervous system

Cancer Site [in animals: thyroid gland tumors]