Standard Active Last Updated: Dec 30, 2021 Track Document
ASTM D4817-88(2021)

Standard Classification for Rubber Compounding Materials—Stearic Acid

Standard Classification for Rubber Compounding Materials—Stearic Acid D4817-88R21 ASTM|D4817-88R21|en-US Standard Classification for Rubber Compounding Materials—Stearic Acid Standard new BOS Vol. 09.01 Committee D11
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Significance and Use

3.1 Stearic acid is important in the rubber vulcanization process. It is believed that the stearic acid reacts with zinc-oxide or other metallic oxides, during vulcanization, to form a rubber soluble salt or soap, that reacts with the accelerator enabling it to exert its full effect.

3.2 Stearic acid of commerce is generally a mixture of palmitic, stearic, and oleic acids usually derived from tallow base stock but can be derived from other fats and oils of animal or vegetable origins.


1.1 This classification covers the compounding materials commercially known as stearic acid.

1.2 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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Book of Standards Volume: 09.01
Developed by Subcommittee: D11.20
Pages: 2
DOI: 10.1520/D4817-88R21
ICS Code: 83.040.20