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

Appendix 14: Dipropylene glycol monomethyl ether (DPGME) 
104     General description

Dipropylene glycol monomethyl ether (DPGME) is a solvent produced either by reaction of propylene oxide with methanol or by alkylation of dipropylene glycol with dialkylsulphate in the presence of a catalyst. The result is a mixture of four isomers with the general CAS no: 34590-94-8, in which secondary alcohol isomers are predominant (BUA 1995).

104.1     Identity

Molecular formula:          C₇H₁₆O₃

Structural formula:

Molecular weight:            148.20

CAS-no.:                        34590-94-8

Synonyms:                      DPGME

                                      Dipropylene glycol monomethyl ether

                                      Methoxymethylethoxypropanol

       Dowanol 50B

Methyl ether oxybispropanol

Dowanol DPM

Bis-(2-methoxypropyl) ether

1(or 2)-(2-Methoxymethylethoxy)-propanol

Arcosolve DPM

PPG-2 methyl ether

Solvenon DPM

104.2     Physical / chemical properties

Description:                            Colourless liquid with ether odour.

Melting point:                  -80 °C, -83 °C

Boiling point:                   189.6 °C

                                             187 – 192 °C

Density:                          0.94 g/ml at 20 °C

Vapour pressure:             0.278 mm Hg (0.37 hPa) at 20 °C         

Concentration of

saturated vapours:           366 ppm at 20 °C and 1 atm (calculated)

                                      300 ppm at 20°C and 1 atm  (max. obtainable conc.)

Conversion factor:           1 ppm = 6.16 mg/m³    (at 20°C and 760 mmHg)    

                                      1 mg/m³ = 0.162 ppm

Solubility:                        Completely miscible with water as well as with many organic solvents, e.g. acetone, benzene, ethanol, ether.

Odour threshold:              35 ppm (215.6 mg/m³)

References:                    A&H (1990), ACGIH (1991), Breslin et al. (1996), BUA (1995), Chemfinder (2002), Merck (1996), HSDB (2001), IUCLID (2000), Rowe et al. (1954).

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