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

Appendix 9: Ethylene glycol (EG) 
64     General description

64.1     Identity

Molecular formula:          C₂H₆O₂

Structural formula:           HO-CH₂-CH₂-OH

Molecular weight:            62.07

CAS-no.:                        107-21-1

Synonyms:                                      1,2-Dihydroxyethane

                                      1,2-Ethanediol

                                      Ethane-1,2-diol

                                      2-Hydroxyethanol

                                      Glycol     

                                             MEG

                                      Monoethylene glycol

64.2     Physical / chemical properties

Description:                            Ethylene glycol is a clear, colourless, slightly viscous, hygroscopic liquid with a sweet taste.

Melting point:                  -13 °C

Boiling point:                   197.56 °C (at 760 mmHg)

Density:                          1.113 g/ml (at 20 °C)

Vapour pressure:             0.06 mmHg (8 Pa) (at 20 °C)

Concentration of

saturated vapours:           79 ppm (204 mg/m³) (at 20 °C and 760 mmHg) (calculated)

Conversion factor:           1 ppm = 2.58 mg/m³        (at 20 °C and 760 mmHg)

                                      1 mg/m³ = 0.388 ppm

Solubility:                               Water: Miscible.

Miscible with lower aliphatic alcohols, glycerol, acetic acid, acetone and similar ketones, aldehydes and pyridine. Practically insoluble in benzene, chlorinated hydrocarbons, petroleum ether and oils.

logP_{octanol/water}:                 -1.93 to -1.36 (at 25 ºC).

References:                    IUCLID (2000), ATSDR (1997), BUA (1991), ACGIH (2001).

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