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Name	Methyl dioxolane	EINECS	207-841-4
CAS No.	497-26-7	Density	0.97g/cm³
PSA	18.46000	LogP	0.37920
Solubility	very soluble SOLVENT	Melting Point	N/A
Formula	C4H8 O2	Boiling Point	82 - 83 C
Molecular Weight	88.1063	Flash Point	-2 C
Transport Information	HAZARD	Appearance	clear liquid
Safety	Moderately toxic by ingestion. Mildly toxic by inhalation. A skin and eye irritant. When heated to decomposition it emits acrid smoke and irritating fumes.	Risk Codes	11-36
Molecular Structure		Hazard Symbols	2 (Packing Group: II) UN NO.
Synonyms	2-Methyl-1,3-dioxacyclopentane;2-Methyl-1,3-dioxolane;2-Methyldioxolane;Methyl dioxolane;NSC 5209;	Article Data	73

Methyl dioxolane Synthetic route

: 107-21-1
ethylene glycol

: 75-07-0
acetaldehyde

: 497-26-7
2-methyl-1,3-dioxolane

Conditions

Conditions	Yield
With chloro-trimethyl-silane at 20℃; for 0.416667h;	97%
With toluene-4-sulfonic acid 1.)cooling, 1 h 2.)20 deg C, 20 h;	57%
With C6H12Bi6O28S6 for 4h; Reflux;	10%

: 64-17-5
ethanol

: 107-21-1
ethylene glycol

: 497-26-7
2-methyl-1,3-dioxolane

Conditions

Conditions	Yield
With iron(III) chloride hexahydrate; sodium nitrite at 50℃; for 24h; Temperature; Time; UV-irradiation;	67%

: 4360-63-8
2-bromomethyl-1,3-dioxolane

: 24398-88-7
ethyl 3-bromobenzoate

A: 497-26-7
2-methyl-1,3-dioxolane

B: 4405-17-8
di(1,3-dioxolan-2-yl)methane

C: 93-89-0
benzoic acid ethyl ester

D: 898776-72-2
ethyl 3-((1,3-dioxolan-2-yl)methyl)benzoate

E: 3,3'-dicarbethoxybiphenyl

Conditions

Conditions	Yield
With pyridine; 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone; 1,10-Phenanthroline; NiI2*3.5H2O; sodium iodide; zinc at 20 - 60℃; for 19h; chemoselective reaction;	A n/a B n/a C n/a D 66% E n/a

...Expand

: 110-80-5
2-ethoxy-ethanol

: 546-67-8
lead(IV) tetraacetate

A: 497-26-7
2-methyl-1,3-dioxolane

B: 111-15-9
2-ethoxyethyl acetate

C: 141-78-6
ethyl acetate

Conditions

Conditions	Yield
In chlorobenzene at 140℃; for 0.5h;	A 27% B 63% C 10%

: 110-80-5
2-ethoxy-ethanol

A: 497-26-7
2-methyl-1,3-dioxolane

B: 111-15-9
2-ethoxyethyl acetate

C: 141-78-6
ethyl acetate

Conditions

Conditions	Yield
With lead(IV) acetate In chlorobenzene at 140℃; for 0.5h; glass tube;	A 27% B 63% C 10%

: 764-48-7
2-hydroxyethyl vinyl ether

: 497-26-7
2-methyl-1,3-dioxolane

Conditions

Conditions	Yield
With potassium hydroxide at 120℃; Product distribution; cyclization, various alkalis;	51%
With sulfuric acid

: 107-21-1
ethylene glycol

A: 497-26-7
2-methyl-1,3-dioxolane

B: 123-91-1
1,4-dioxane

C: 75-07-0
acetaldehyde

D: 111-46-6
diethylene glycol

Conditions

Conditions	Yield
With tungsten trioxide on silica; hydrogen In water at 340℃; Temperature; Inert atmosphere;	A 38.8% B 28.7% C 44.9% D n/a

: 110-80-5
2-ethoxy-ethanol

A: 497-26-7
2-methyl-1,3-dioxolane

B: 628-35-3
ethylene glycol monoformate

C: 22056-82-2
ethoxyacetaldehyde

D: 109-94-4
formic acid ethyl ester

Conditions

Conditions	Yield
With air; methyl nitrite; nitrogen(II) oxide at 23.85℃; under 750 Torr; for 2h; Oxidation; UV-irradiation; Further byproducts given;	A 3.4% B 36% C 24% D 43%

: 107-21-1
ethylene glycol

A: 497-26-7
2-methyl-1,3-dioxolane

B: 111-46-6
diethylene glycol

Conditions

Conditions	Yield
With synthetic silica ge at 150℃; for 24h; Kinetics; Autoclave; Green chemistry;	A 40% B 9%

: 107-21-1
ethylene glycol

: 74-86-2
acetylene

A: 497-26-7
2-methyl-1,3-dioxolane

B: 764-78-3
ethylene glycol divinyl ether

C: 764-48-7
2-hydroxyethyl vinyl ether

Conditions

Conditions	Yield
With sodium hydroxide; cesium fluoride at 138 - 142℃; under 10297.1 Torr; for 3.5h;	A 4% B 11% C 26%

Methyl dioxolane Chemical Properties

Molecule structure of Methyl dioxolane (CAS NO.497-26-7) :

IUPAC Name: 2-methyl-1,3-dioxolane
Molecular Weight: 88.10512 g/mol
Molecular Formula: C₄H₈O₂
Density: 0.97 g/cm³
Boiling Point: 82.4 °C at 760 mmHg
Flash Point: 4 °C
Index of Refraction: 1.394
Molar Refractivity: 21.75 cm³
Molar Volume: 90.7 cm³
Polarizability: 8.62*10^-24 cm³
Surface Tension: 27.9 dyne/cm
Enthalpy of Vaporization: 30.96 kJ/mol
Vapour Pressure: 87.6 mmHg at 25 °C
log P (octanol-water): 0.110
Water Solubility: 6.67E+05 mg/L
Atmospheric OH Rate Constant: 9.40E-12 cm³/molecule-sec
Storage Temp.: flammables area
Sensitive: moisture sensitive
XLogP3-AA: 0.2
H-Bond Acceptor: 2
Exact Mass: 88.05243
MonoIsotopic Mass: 88.05243
Topological Polar Surface Area: 18.5
Heavy Atom Count: 6
Complexity: 38.8
Canonical SMILES: CC1OCCO1
InChI: InChI=1S/C4H8O2/c1-4-5-2-3-6-4/h4H,2-3H2,1H3
InChIKey: HTWIZMNMTWYQRN-UHFFFAOYSA-N
EINECS: 207-841-4
Product Categories: Dioxanes & Dioxolanes; Dioxolanes

Methyl dioxolane Toxicity Data With Reference

1.		eye-rbt 5 mg SEV		AJOPAA American Journal of Ophthalmology. 29 (1946),1363.
2.		orl-rat LD50:3000 mg/kg		JIHTAB Journal of Industrial Hygiene and Toxicology. 31 (1949),60.

Methyl dioxolane Safety Profile

Moderately toxic by ingestion. A severe eye irritant. When heated to decomposition it emits acrid smoke and irritating fumes.
Hazard Codes: F, Xi
Risk Statements: 11-36
R11:Highly flammable.
R36:Irritating to eyes.
Safety Statements: 16-26
S16:Keep away from sources of ignition.
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
RIDADR: UN 1993 3/PG 2
WGK Germany: 2
RTECS: JI3509000
HazardClass: 3
PackingGroup: II

Methyl dioxolane Specification

Methyl dioxolane (CAS NO.497-26-7) is also called 2-Methyl-1,3-dioxacyclopentane ; 2-Methyl-1,3-dioxolane ; 2-Methyldioxolane ; 2-Methyldioxole ; Methyl-1,3-dioxolane ; Methyldioxolane ; NSC 5209 ; 1,3-Dioxolane, 2-methyl- ; Dioxolane, methyl- . Methyl dioxolane (CAS NO.497-26-7) is clear colorless liquid.

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