NIOSH Pocket Guide to Chemical Hazards


CAS 108-46-3


RTECS VG9625000
Synonyms & Trade Names
1,3-Benzenediol; m-Benzenediol; 1,3-Dihydroxybenzene; m-Dihydroxybenzene; 3-Hydroxyphenol; m-Hydroxyphenol
DOT ID & Guide
2876 153


NIOSH REL: TWA 10 ppm (45 mg/m3) ST 20 ppm (90 mg/m3)
OSHA PEL†: none
IDLH N.D. See: IDLH INDEX Conversion 1 ppm = 4.50 mg/m3
Physical Description
White needles, plates, crystals, flakes, or powder with a faint odor. [Note: Turns pink on exposure to air or light, or contact with iron.]
MW: 110.1
BP: 531°F
MLT: 228°F
Sol: 110%
VP(77°F): 0.0002 mmHg
IP: 8.63 eV

Sp.Gr: 1.27
Fl.P: 261°F
UEL: ?
LEL(392°F): 1.4%

Class IIIB Combustible Liquid, but may be difficult to ignite.
Incompatibilities & Reactivities
Acetanilide, albumin, alkalis, antipyrine, camphor, ferric salts, menthol, spirit nitrous ether, strong oxidizers & bases [Note: Hygroscopic (i.e., absorbs moisture from the air).]
Measurement Methods
NIOSH 5701; OSHA PV2053
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water wash immediately
Breathing: Respiratory support
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, skin, nose, throat, upper respiratory system; methemoglobinemia; cyanosis, convulsions; restlessness, bluish skin, increased heart rate, dyspnea (breathing difficulty); dizziness, drowsiness, hypothermia, hematuria (blood in the urine); spleen, kidney, liver changes; dermatitis
Target Organs Eyes, skin, respiratory system, cardiovascular system, central nervous system, blood, spleen, liver, kidneys
See also: INTRODUCTION   See ICSC CARD: 1033