Dioxane

Synonyms & Trade Names
Diethylene dioxide, Diethylene ether, Dioxan, 1,4-Dioxane, p-Dioxane
CAS No.
123-91-1
RTECS No.
DOT ID & Guide
1165 127
Formula
C₄H₈O₂
Conversion
1 ppm = 3.60 mg/m3
IDLH
Ca [500 ppm]
See: 123911
Exposure Limits
NIOSH REL
Ca C 1 ppm (3.6 mg/m3) [30-minute] See Appendix A
OSHA PEL
TWA 100 ppm (360 mg/m3) [skin] See Appendix G
Measurement Methods
NIOSH 1602;
OSHA 7
See: NMAM or OSHA Methods
Physical Description
Colorless liquid or solid (below 53°F) with a mild, ether-like odor.
Molecular Weight
88.1
Boiling Point
214°F
Freezing Point
53°F
Solubility
Miscible
Vapor Pressure
29 mmHg
Ionization Potential
9.13 eV
Specific Gravity
1.03
Flash Point
55°F
Upper Exposive Limit
22%
Lower Explosive Limit
2.0%
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities
Strong oxidizers, decaborane, triethynyl aluminum
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, nose, throat; drowsiness, headache; nausea, vomiting; liver damage; kidney failure; [potential occupational carcinogen]
Target Organs
Eyes, skin, respiratory system, liver, kidneys
Cancer Site
[in animals: lung, liver & nasal cavity tumors]
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 wash 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   ICSC CARD: 0041   MEDICAL TESTS: 0090
Page last reviewed: October 17, 2018