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Appendices 1-18 to: Report on the Health Effects of Selected Pesticide Coformulants

Appendix 3: Dimethyl ether (DME)  
16   General description

16.1   Identity

Molecular formula:          C₂H₆O

Structural formula:           H₃C-O-CH₃

Molecular weight:            46.07

CAS-no.:                        115-10-6

Synonyms:                      Methyl ether

                                      Oxybismethane

                                      Methoxymethane

                                      Methyloxide

                                      Dimethyl –13C2 (gas)

                                      Wood ether

16.2   Physical / chemical properties

Description:                    Colourless, flammable gas with a slight ethereal odour.

Melting point:                  -138.5 °C

Boiling point:                   - 23.7 °C

Density:                          0.669 g/ml (at 20°C)

Vapour pressure:            3982 mmHg (530.8 kPa) (at 20°C)

Concentration of

saturated vapours:           -

Conversion factor:          1 ppm = 1.91 mg/m³        (at 20°C and 760 mmHg)

                                      1 mg/m³ = 0.523 ppm

Solubility:                       Water:  328 g/l (at 20°C)

LogP_o/w:                        - 0,18

References:                    A&H (1995), Berkhout (1997), Kirwin & Galvin (1993), IUCLID (2000), Merck Index (1996). 

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