Fuel and Lubricant Testing


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ASTM D664 - Acid Number of Petroleum Products by Potentiometric Titration

We perform acid number testing by ASTM D664 to determine the acidic constituents in petroleum products, lubricants, biodiesel, and biodiesel blends. This test is also called a neutralization number test.

Biodiesel and biodiesel blends (and other petroleum products) may contain acidic constituents that are present as additives or as degradation products formed during service, such as oxidation products. The acid number is a measure of the acidic substance in the fuel sample (as defined under the conditions of the test). The acid number is used as a guide in the quality control of lubricating oil formulations.

We also perform acidity and acid number testing by ASTM D1613ASTM D3242, ASTM D7795ASTM D847ASTM D974IP 139IP 177IP 354ISO 6618ISO 6619, and SAE ARP5088. These different test methods use different instruments or procedures or are used for certain sample types. Click on the test method number to learn more about each test.

Contact us today to receive a quote for your petroleum testing.

Sample quantity required: 10 ml

ASTM D664 corresponds to IP 177.

For additional information on this test method or to purchase a copy of the method, please click HERE to open a new window and visit the ASTM website. Learn more about our laboratory's certifications and quality program here.