These test methods can be used to characterize the odors of ethylene, diethylene, triethylene, propylene, and dipropylene glycol and estimating the intensity of the odor. The products are compared to previously established standards. The acceptability of the product for a specific end use can be determined with this information.
A procedure which can be used to characterize the taste of propylene glycol and establish the intensity of this taste relative to a previously established standard is delineated. The acceptability of the product for a specific end use can be determined with this information.
These tests may be used to qualify the suitability of these products for use in a customer-producer relationship.