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1.1 This test method covers the determination of the saponification number of synthetic waxes and natural waxes.
1.2 This test method is applicable to Fischer Tropsche, microcrystalline, polyethylene, and Montan Ester waxes.
1.3 Certain synthetic waxes, notably copolymers of ethylene, exhibit poor reproducibility when running saponification values. Reproducibility can be improved if cooking time in 7.2 is extended from 3 h to 18-20 h.
1.4 Some oxidized polyethylene and other waxes with a melt temperature above 100°C may give poor reproducibility.
1.5 Some dark-colored (Gardner Color 14) waxes may obscure the color change of the indicator, resulting in poor reproducibility.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E200 Practice for Preparation, Standardization, and Storage of Standard and Reagent Solutions for Chemical Analysis
ICS Number Code 75.140 (Waxes, bituminous materials and other petroleum products)
UNSPSC Code 12181501(Synthetic waxes); 12181502(Natural waxes)
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ASTM D1387-89(2002), Standard Test Method for Saponification Number (Empirical) of Synthetic and Natural Waxes, ASTM International, West Conshohocken, PA, 1989, www.astm.orgBack to Top