# NIOSH Pocket Guide to Chemical Hazards
Hexylene glycol | CAS 107-41-5
(CH3)2COHCH2CHOHCH3 | RTECS SA0810000
Synonyms & Trade Names 2,4-Dihydroxy-2-methylpentane; 2-Methyl-2,4-pentanediol; 4-Methyl-2,4-pentanediol; 2-Methylpentane-2,4-diol | DOT ID & Guide
Exposure Limits | NIOSH REL: C 25 ppm (125 mg/m3)
OSHA PEL†: none
IDLH N.D. | Conversion 1 ppm = 4.83 mg/m3
Physical Description Colorless liquid with a mild, sweetish odor.
MW: 118.2 | BP: 388°F | FRZ: -58°F (Sets to glass) | Sol: Miscible
VP: 0.05 mmHg | IP: ? |  | Sp.Gr: 0.92
Fl.P: 209°F | UEL(est): 7.4% | LEL(calc): 1.3% |
Class IIIB Combustible Liquid: Fl.P. at or above 200°F.
Incompatibilities & Reactivities Strong oxidizers, strong acids [Note: Hygroscopic (i.e., absorbs moisture from the air).]
Measurement Methods None available
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: No recommendation Provide: Eyewash | First Aid (See procedures) Eye: Irrigate immediately Skin: Water wash immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, respiratory system; headache, dizziness, nausea, incoordination, central nervous system depression; dermatitis, skin sensitization
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION