NIOSH Pocket Guide to Chemical Hazards


CAS 115-77-5


RTECS RZ2490000
Synonyms & Trade Names
2,2-bis(Hydroxymethyl)-1,3-propanediol; Methane tetramethylol; Monopentaerythritol; PE; Tetrahydroxymethylolmethane; Tetramethylolmethane
DOT ID & Guide


NIOSH REL: TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)
OSHA PEL†: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)
IDLH N.D. See: IDLH INDEX Conversion
Physical Description
Colorless to white, crystalline, odorless powder. [Note: Technical grade is 88% monopentaerythritol & 12% dipentaerythritol.]
MW: 136.2
BP: Sublimes
MLT: 500°F (Sublimes)
Sol(59°F): 6%
VP: 0.00000008 mmHg
IP: ?

Sp.Gr: 1.38
Fl.P: ?
UEL: ?
LEL: ?

Combustible Solid
Incompatibilities & Reactivities
Organic acids, oxidizers [Note: Explosive compound is formed when a mixture of PE & thiophosphoryl chloride is heated.]
Measurement Methods
NIOSH 0500, 0600
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
Skin: No recommendation
Eyes: No recommendation
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation

First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water wash
Breathing: Fresh air
Swallow: Medical attention immediately
Important additional information about respirator selection
Respirator Recommendations Not available.
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, respiratory system
Target Organs Eyes, respiratory system