Propylene glycol methyl ether acetate

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Propylene glycol methyl ether acetate
PGMEA.svg
Names
IUPAC name
1-Methoxy-2-propanyl acetate
Other names
PGMEA; 1-Methoxy-2-propanol acetate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.003.277
UNII
Properties
C6H12O3
Molar mass 132.16 g·mol−1
Hazards
Template:H226, Template:H360 , Template:H402
NFPA 704
Flammability code 2: Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur. Flash point between 38 and 93 °C (100 and 200 °F). E.g., diesel fuel Health code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentine Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Flash point 43 °C (109 °F; 316 K)
333 °C (631 °F; 606 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Propylene glycol methyl ether acetate (PGMEA, 1-methoxy-2-propanol acetate) is a P-type glycol ether used in inks, coatings, and cleaners. It is sold by Dow Chemical under the name Dowanol PMA[2] and by Shell Chemical under the name methyl proxitol acetate.[3][4]

In the semiconductor industry, PGMEA is a commonly used solvent, primarily for the application of surface adherents such as Bis(trimethylsilyl)amine (HMDS) on silicon wafers.[5] The compound is often the most abundant airborne, molecular contamination (AMC) in semiconductor cleanrooms,[6] due to its evaporation into ambient air.

Please note that the data page on the Shell Chemicals website referenced below gives the boiling point of propylene glycol methyl ether acetate as 120°C. On the Dow Chemical 'Dowanol PMA' datasheet, the boiling point at 1010 mbar is given as 146°C. Both of these pieces of information are at variance with the vapour pressure versus temperature curve published on this page that indicates that the vapour pressure of propylene glycol methyl ether acetate is HIGHER than that of water when calculated using the Antoine Equation, whereas the boiling point information provided by both Shell Chemical and Dow Chemical imply that it should be considerably LOWER than the vapour pressure of water. The Dow Chemical data sheet (https://www.dow.com/assets/attachments/business/pcm/dowanol/dowanol_pma/tds/dowanol_pma.pdf accessed on 16th January 2018) also lists the extrapolated vapour pressure for propylene glycol methyl ether acetate at 20°C as 3.7 mbar whereas the published plot below indicates a value around 300 mbar. Clearly these discrepancies need the attention of someone who has detailed knowledge of the compound and its physical properties.

In addition, the label of the vertical axis on the vapour pressure versus temperature graph should read 'Millibars' and not 'Log10(Millibars). The scale is logarithmic, however the values for the vapour pressures shown are in millibars, not the logarithms (base 10) of the vapour pressure values.

Vapor Pressure Curve for PGMEA vs. Water

References[edit]