DIMETHYL ETHER (AroKor Holdings Inc.)

DIMETHYL ETHER

GENERAL

Dimethyl ether (DME) is a carbinol downstream product. Dimethyl ether is non-corrosive to metals, stable under high temperature or high humidity conditions, containing no chlorine fluoride hydrocarbon. It is a substitute for freon.

PHYSICAL PROPERTY & DESCRIPTION

CAS NO.

STRUCTURE

Appearance: Colorless gas with a characteristic, sweet, ether odor detectable at 0.33 ppm.
Solubility: 6.9 g/100 mL
Density: 0.7134
Boiling Point: 34.6 ¡É
Melting Point: -116.3 ¡É
Vapor Density (Air=1):2.6
Vapor Pressure (mm Hg):442
Evaporation Rate (BuAc=1):37.5

115-10-6

SYNONYM

Methyl Ether

MOL WT.

C₂H₆O
46.07

PRECAUTION IN HANDLING

Avoid breathing high concentrations of vapors and avoid liquid contact with skin or eyes. Use in well-ventilated area away from possible ignition sources. Lines and equipment which will contain dimethyl ether should be pretested with nitrogen using soapy water to detect leaks. Use with sufficient ventilation to keep employee exposure below recommended limits. Storage Keep container tightly closed and away from heat, sparks and flame. Keep container in a cool, clean and dry area. Do not heat above 52 deg C (125 deg F). Store away from oxygen cylinders or other oxidizing materials and possible ignition sources. Ground all equipment and cylinders before use.

APPLICATION

DME is used in spray paint, hair spray, air refresher, auto aerosol preparation, spray insecticide and in the production of high purity dimethyl sulfate. It is also used in dyestuffs and other chemical industries as a solvent and extracting agent. DME has also been successfully developed as cryogen.

SPECIFICATION

Purity	WT%	Min 99.9
Carbon Dioxide	ppm	Max 100
Free MEOH	ppm	Max 100
Methyl Formate	ppm	Max 100
Evaporation Residue	ppm	Max 20
Specific Gravity(20¡É)	-	0.67±0.01
Moisture	ppm	Max 100
Appearance	-	Color Less
Non Volatile Residue	ppm	-
Acidity	ppm	-
Peroxide	-	-
Aldehyde	mg/100ml	-
Acetylene	ppm	-
Color	APHA	-
Boiling Point	¡É	-24.8
Freezing Point	¡É	-141.5
Flash Point	¡É	-41
Auto Ignition Point	¡É	350
Vapor Pressure	§®Hg(20¡É)	3,982
Vapor Density (Air=1)	-	1.56
Solubility In H₂O	WT%(20¡É)	7
LEL	VOL %	3.45
UEL	VOL %	26.7
Evaproation Rate(BUAL=1)	-	209

GENERAL DESCRIPTION OF ETHER

Ether is any of a number of organic compounds characterized by an oxygen atom joined by two carbon atoms that are part of hydrocarbon groups. The general formula is ROR', where R and R' are alkyl groups. Ethers are formed by the condensation of two alcohols. They are similar to alcohols but are generally less dense, less soluble in water, and have lower boiling points. They are relatively unreactive chemically. This unreactive property makes ethers valuable as solvents. Common names of ethers simply list the alkyl groups in alphabetical order (ethyl methyl ether, IUPAC name is methoxyethane). Epoxides and crown ethers are a special class of cyclic ethers. Epoxide (oxirane) is a three-membered cyclic ether in which an oxygen atom is joined to each of two carbon atoms that are already bonded to each other. Crown Ether is a macrocyclic polyether whose structure contains hydrogen, carbon and oxygen atoms. Each oxygen atoms are confined between two carbon atoms and exhibits a conformation with a hole (accordingly called "crown").