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Appendices 1-18 to: Report on the Health Effects of Selected Pesticide Coformulants
Appendix 12: 1-Methoxy-2-propanol (2PG1ME)
88 General description
88.1 Identity
88.2 Physical / chemical properties
Most of the available toxicological data on 1-methoxy-2-propanol (2PG1ME) relate to the commercial compound methoxy-propanol (PGME), which consists of 95-99% 2PG1ME and less than 5% 2-methoxy-1-propanol (1PG2ME).
88.1 Identity
Molecular formula: C4H10O2
Structural formula: CH3-CH-CH2-O-CH3
OH
Molecular weight: 90.1
CAS-no.: 107-98-2
Synonyms: 1-Methoxy-2-propanol;
1-Methoxypropan-2-ol;
Methoxypropanol, alpha isomer;
Propylene Glycol Monomethyl Ether;
PGME;
2-Propylene glycol 1-methyl ether;
2PG1ME;
methoxy ether of propylene glycol;
alpha-propylene glycol monomethyl ether;
propylene glycol 1-methyl ether;
(+/-)-1-methoxy-2-propanol;
1-Methoxy-2-hydroxypropane
88.2 Physical / chemical properties
Description: 1-Methoxy-2-propanol (2PG1ME) is the a-isomer of propylene glycol monomethyl ether (PGME). It is a colourless liquid with a sweet ether-like odour.
Melting point: - 96 °C
Boiling point: 120 °C
Density: 0.924 g/ml (at 20°C)
Vapour pressure: 9 mmHg (12 hPa) (at 20°C)
Concentration of
saturated vapours: 44348 mg/m3 (calculated at 20°C and 1 atm)
Conversion factor: 1 ppm = 3.75 mg/m3 (calculated at 20°C and 1 atm)
1 mg/m3 = 0.267 ppm
Solubility: Water: completely soluble
Partition coefficient: log Po/w = -0.49 to -0.43 (BUA 1997)
References: A&H (1990), ACGIH (1991), BUA (1997), DECOS (1993), ECETOC (1995).
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