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1,4-Dioxane Structure

1,4-Dioxane

Product Name1,4-Dioxane

CAS123-91-1

CBNumberCB6240532

MFC4H8O2

MW88.11

EINECS204-661-8

MDL NumberMFCD00006571

MOL File123-91-1.mol

MSDS FileSDS

Chemical Properties

Melting point 12 °C
Boiling point 101 °C
Density  1.034 g/mL at 25 °C(lit.)
vapor density  3 (vs air)
vapor pressure  27 mm Hg ( 20 °C)
refractive index  n20/D 1.422(lit.)
Flash point 54 °F
storage temp.  room temp
solubility  Soluble in acetone, alcohol, benzene, and ether (Weast, 1986). Miscible with most organic solvents (Huntress and Mulliken, 1941) including 2-methylpropanol, toluene, cychexanone, and cyclopentanone.
form  Solution
color  APHA: ≤20
Odor Mild ether-like odor detectable at 0.8 to 172 ppm (mean = 12 ppm)
PH 6-8 (500g/l, H2O, 20℃)
explosive limit 1.7-25.2%(V)
Water Solubility  SOLUBLE
Sensitive  Hygroscopic
λmax λ: 220 nm Amax: ≤0.70
λ: 235 nm Amax: ≤0.50
λ: 250 nm Amax: ≤0.20
λ: 270 nm Amax: ≤0.10
λ: 295-400 nm Amax: ≤0.01
Merck  14,3300
BRN  102551
Henry's Law Constant 4.89(x 10-6 atm?m3/mol) (static headspace-GC, Welke et al., 1998)
Exposure limits TLV-TWA 25 ppm (≈90 mg/m3) (ACGIH), 100 ppm (MSHA and OSHA); carcinogenicity: Animal Sufficient Evidence (IARC).
Stability Stable. Incompatible with oxidizing agents, oxygen, halogens, reducing agents, moisture. Highly flammable - note wide explosive range. May form explosive peroxides in storage (rate of formation increased by heating, evaporation or exposure to light).
InChIKey RYHBNJHYFVUHQT-UHFFFAOYSA-N
CAS DataBase Reference 123-91-1(CAS DataBase Reference)
IARC 2B (Vol. 11, Sup 7, 71) 1999
NIST Chemistry Reference 1,4-Dioxane(123-91-1)
EPA Substance Registry System 1,4-Dioxane (123-91-1)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H225-H304-H315-H319-H335-H340-H350-H372-H412
Precautionary statements P210-P273-P301+P310-P303+P361+P353-P305+P351+P338-P331
Hazard Codes  Xn,F,T
Risk Statements  45-46-11-36/38-48/23/24/25-65-66-40-36/37-19-41-37/38-39/23/24/25-23/24/25-48/20/22-38-22-36/37/38-10
Safety Statements  9-16-36/37-46-45-53-7-62-26-24/25-23-S9-S46-S36/37-S16
RIDADR  UN 1993 3/PG 2
WGK Germany  3
RTECS  JG8225000
8
Autoignition Temperature 180 °C
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29329990
Hazardous Substances Data 123-91-1(Hazardous Substances Data)
Toxicity LD50 in mice, rats (ml/kg): 5.7, 5.2 orally (Laug)
IDLA 500 ppm
NFPA 704:
3
2 1

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