ASTM D 664 : 2024
Current
The latest, up-to-date edition.
Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration
Hardcopy , PDF
English
05-01-2024
Important note : All end users must be registered with an Account prior to user licenses being assigned.| Committee |
D 02
|
| DocumentType |
Test Method
|
| Pages |
12
|
| PublisherName |
American Society for Testing and Materials
|
| Status |
Current
|
| Supersedes |
1.1This test method covers procedures for the determination of acidic constituents in petroleum products, lubricants, biodiesel, and blends of biodiesel.
1.1.1Test Method A—Developed for use with petroleum products and lubricants soluble or nearly soluble in mixtures of toluene and propan-2-ol. It is applicable for the determination of acids whose dissociation constants in water are larger than 10–9; extremely weak acids whose dissociation constants are smaller than 10–9 do not interfere. Salts react if their hydrolysis constants are larger than 10–9. The range of acid numbers included in the precision statement is 0.5 mg KOH/g to 90 mg KOH/g. The precision has only been determined for those materials and acid number ranges as shown in the precision section.
1.1.2Test Method B—Developed specifically for biodiesel and biodiesel blends with low acidity and slightly different solubility. This test method requires the use of an automatic titrator with automatic endpoint-seeking capability.
Note 1:In new and used oils, the constituents that may be considered to have acidic characteristics include organic and inorganic acids, esters, phenolic compounds, lactones, resins, salts of heavy metals, salts of ammonia and other weak bases, acid salts of polybasic acids, and addition agents such as inhibitors and detergents.
1.2For acid number determination of acidic components in crude oil and petroleum products including waxes, bitumen, base stocks, and asphalts that are soluble in mixtures of xylenes and propan-2-ol use test method Test Method D8045. The precision for this method has not been determined for any products covered by Test Method D8045.
1.3The test method may be used to indicate relative changes that occur in oil during use under oxidizing conditions regardless of the color or other properties of the resulting oil. Although the titration is made under definite equilibrium conditions, the test method is not intended to measure an absolute acidic property that can be used to predict performance of oil under service conditions. No general relationship between acid number and the corrosive tendency of oils towards metals is known.
Note 2:The acid number obtained by this standard may or may not be numerically the same as that obtained in accordance with Test Methods D974 and D3339. There has not been any attempt to correlate this method with other non-titration methods.
Note 3:A few laboratories have made the observation that there is a difference in Test Method D664 results when aqueous versus nonaqueous buffers are used.
1.4The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5This 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.
1.6This 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.
| ASTM D 4742 : 2023 | Standard Test Method for Oxidation Stability of Gasoline Automotive Engine Oils by Thin-Film Oxygen Uptake (TFOUT) |
| ASTM D 4652 : 2020 | Standard Specification for Silicone Liquid Used for Electrical Insulation |
| ASTM D 8031 : 2016 | Standard Test Method for Acid Number of Terephthalic Acid (TA) by Automatic Potentiometric Titration |
| ASTM D 8048 : 2024 | Standard Test Method for Evaluation of Diesel Engine Oils in T-13 Diesel Engine |
| ASTM D 8074 : 2023 | Standard Test Method for Evaluation of Diesel Engine Oils in DD13 Diesel Engine |
| ASTM D 4304 : 2022 | Standard Specification for Mineral and Synthetic Lubricating Oil Used in Steam or Gas Turbines |
| ASTM D 7414 : 2022 | Standard Test Method for Condition Monitoring of Oxidation in In-Service Petroleum and Hydrocarbon Based Lubricants by Trend Analysis Using Fourier Transform Infrared (FT-IR) Spectrometry |
| ASTM D 8279 : 2024 | Standard Test Method for Determination of Timing-Chain Wear in a Turbocharged, Direct-Injection, Spark-Ignition, Four-Cylinder Engine |
| ASTM D 5277 : 2022 | Standard Test Method for Performing Programmed Horizontal Impacts Using an Inclined Impact Tester |
| ASTM D 7422 : 2023 | Standard Test Method for Evaluation of Diesel Engine Oils in T-12 Exhaust Gas Recirculation Diesel Engine |
| ASTM D 6750 : 2023 | Standard Test Methods for Evaluation of Engine Oils in a High-Speed, Single-Cylinder Diesel Engine—1K Procedure (0.4 % Fuel Sulfur) and 1N Procedure (0.04 % Fuel Sulfur) |
| ASTM D 8350 : 2024 | Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence IVB Spark-Ignition Engine |
| ASTM D 5967 : 2021 | Standard Test Method for Evaluation of Diesel Engine Oils in T-8 Diesel Engine |
| ASTM D 1934 : 2020 | Standard Test Method for Oxidative Aging of Electrical Insulating Liquids by Open-Beaker Method |
| ASTM D 3339 : 2021 | Standard Test Method for Acid Number of Petroleum Products by Semi-Micro Color Indicator Titration |
| ASTM D 7665 : 2022 | Standard Guide for Evaluation of Biodegradable Heat Transfer Fluids |
| ASTM D 7156 : 2024 | Standard Test Method for Evaluation of Diesel Engine Oils in the T-11 Exhaust Gas Recirculation Diesel Engine |
| ASTM D 6074 : 2015 : R2022 | Standard Guide for Characterizing Hydrocarbon Lubricant Base Oils |
| ASTM D 117 : 2022 | Standard Guide for Sampling, Test Methods, and Specifications for Electrical Insulating Liquids |
| ASTM D 7549 : 2023 | Standard Test Method for Evaluation of Heavy-Duty Engine Oils under High Output Conditions—Caterpillar C13 Test Procedure |
| ASTM D 4310 : 2022 : REV A | Standard Test Method for Determination of Sludging and Corrosion Tendencies of Inhibited Mineral Oils |
| ASTM D 4057 : 2022 | Standard Practice for Manual Sampling of Petroleum and Petroleum Products |
| ASTM D 396 : 2024 | Standard Specification for Fuel Oils |
| ASTM D 7826 : 2023 : REV B | Standard Guide for Evaluation of New Aviation Gasolines and New Aviation Gasoline Additives |
| ASTM D 943 : 2020 | Standard Test Method for Oxidation Characteristics of Inhibited Mineral Oils |
| ASTM D 6469 : 2020 | Standard Guide for Microbial Contamination in Fuels and Fuel Systems |
| ASTM D 5966 : 2022 | Standard Test Method for Evaluation of Engine Oils for Roller Follower Wear in Light-Duty Diesel Engine |
| ASTM D 5704 : 2024 | Standard Test Method for Evaluation of the Thermal and Oxidative Stability of Lubricating Oils Used for Manual Transmissions and Final Drive Axles |
| ASTM D 1534 : 1995 : R2017 | Standard Test Method for Approximate Acidity in Electrical Insulating Liquids by Color-Indicator Titration |
| ASTM D 5770 : 2023 | Standard Test Method for Semiquantitative Micro Determination of Acid Number of Lubricating Oils During Oxidation Testing |
| ASTM E 287 : 2002 : R2019 | Standard Specification for Laboratory Glass Graduated Burets |
| ASTM D 8323 : 2020 | Standard Guide for Management of In-Service Phosphate Ester-based Fluids for Steam Turbine Electro-Hydraulic Control (EHC) Systems |
| ASTM D 2440 : 2013 : R2021 | Standard Test Method for Oxidation Stability of Mineral Insulating Oil |
| ASTM D 3394 : 2016 : R2022 | Standard Test Methods for Sampling and Testing Electrical Insulating Board |
| ASTM D 6923 : 2023 | Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine—Caterpillar 1R Test Procedure |
| ASTM D 6158 : 2023 | Standard Specification for Mineral Hydraulic Oils |
| ASTM D 974 : 2022 | Standard Test Method for Acid and Base Number by Color-Indicator Titration |
| ASTM D 8291 : 2024 | Standard Test Method for Evaluation of Performance of Automotive Engine Oils in the Mitigation of Low-Speed, Preignition in the Sequence IX Gasoline Turbocharged Direct-Injection, Spark-Ignition Engine |
| ASTM D 6618 : 2023 | Standard Test Method for Evaluation of Engine Oils in Diesel Four-Stroke Cycle Supercharged 1M-PC Single Cylinder Oil Test Engine |
| ASTM D 7468 : 2022 | Standard Test Method for Cummins ISM Test |
| ASTM D 5846 : 2007 : R2017 | Standard Test Method for Universal Oxidation Test for Hydraulic and Turbine Oils Using the Universal Oxidation Test Apparatus |
| ASTM D 1240 : 2024 | Standard Test Methods for Rosin Acids Content of Pine Chemicals, Including Rosin, Tall Oil, and Related Products |
| ASTM D 8181 : 2019 | Standard Specification for Microemulsion Blendstock for Preparing Microemulsion Test Fuel Oils |
| ASTM D 7720 : 2021 | Standard Guide for Statistically Evaluating Measurand Alarm Limits when Using Oil Analysis to Monitor Equipment and Oil for Fitness and Contamination |
| ASTM D 2619 : 2021 | Standard Test Method for Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method) |
| ASTM D 7583 : 2016 : R2023 | Standard Test Method for John Deere Coolant Cavitation Test |
| ASTM D 6823 : 2008 : R2021 | Standard Specification for Commercial Boiler Fuels With Used Lubricating Oils |
| ASTM F 715 : 2007 : R2023 | Standard Test Methods for Coated Fabrics Used for Oil Spill Control and Storage |
| ASTM D 6710 : 2021 | Standard Guide for Evaluation of Hydrocarbon-Based Quench Oil |
| ASTM D 4739 : 2023 | Standard Test Method for Base Number Determination by Potentiometric Hydrochloric Acid Titration |
| ASTM D 5222 : 2023 | Standard Specification for Less Flammable High Molecular Weight Hydrocarbon Mineral Electrical Insulating Liquids |
| ASTM D 7666 : 2012 : R2019 | Standard Specification for Triglyceride Burner Fuel |
| ASTM D 4174 : 2023 | Standard Practice for Cleaning, Flushing, and Purification of Petroleum Fluid Hydraulic Systems |
| ASTM D 6681 : 2023 | Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine—Caterpillar 1P Test Procedure |
| ASTM D 5282 : 2005 : R2020 | Standard Test Methods for Compatibility of Construction Material with Silicone Fluid Used for Electrical Insulation |
| ASTM D 8128 : 2022 | Standard Guide for Monitoring Failure Mode Progression in Industrial Applications with Rolling Element Ball Type Bearings |
| ASTM D 7973 : 2019 | Standard Guide for Monitoring Failure Mode Progression in Plain Bearings |
| ASTM D 6751 : 2023 : REV A | Standard Specification for Biodiesel Fuel Blendstock (B100) for Middle Distillate Fuels |
| ASTM D 8506 : 2023 | Standard Guide for Microbial Contamination and Biodeterioration in Turbine Oils and Turbine Oil Systems |
| ASTM D 8029 : 2023 | Standard Specification for Biodegradable, Low Aquatic Toxicity Hydraulic Fluids |
| ASTM D 4293 : 2022 | Standard Specification for Phosphate Ester-Based Fluids for Turbine Lubrication and Steam Turbine Electro-Hydraulic Control (EHC) Applications |
| ASTM D 7752 : 2018 | Standard Practice for Evaluating Compatibility of Mixtures of Hydraulic Fluids |
| ASTM D 4378 : 2024 | Standard Practice for In-Service Monitoring of Mineral Turbine Oils for Steam, Gas, and Combined Cycle Turbines |
| ASTM D 6224 : 2023 | Standard Practice for In-Service Monitoring of Lubricating Oil for Auxiliary Power Plant Equipment |
| ASTM D 7467 : 2023 | Standard Specification for Diesel Fuel Oil, Biodiesel Blend (B6 to B20) |
| ASTM D 4871 : 2011 : R2022 | Standard Guide for Universal Oxidation/Thermal Stability Test Apparatus |
| ASTM D 7098 : 2021 | Standard Test Method for Oxidation Stability of Lubricants by Thin-Film Oxygen Uptake (TFOUT) Catalyst B |
| ASTM D 8045 : 2017 : R2023 | Standard Test Method for Acid Number of Crude Oils and Petroleum Products by Catalytic Thermometric Titration |
| ASTM D 5372 : 2020 | Standard Guide for Evaluation of Hydrocarbon Heat Transfer Fluids |
| ASTM D 7155 : 2020 | Standard Practice for Evaluating Compatibility of Mixtures of Turbine Lubricating Oils |
| ASTM D 4636 : 2017 | Standard Test Method for Corrosiveness and Oxidation Stability of Hydraulic Oils, Aircraft Turbine Engine Lubricants, and Other Highly Refined Oils |
| ASTM D 6439 : 2023 | Standard Guide for Cleaning, Flushing, and Purification of Steam, Gas, and Hydroelectric Turbine Lubrication Systems |
| ASTM D 7484 : 2023 : REV A | Standard Test Method for Evaluation of Automotive Engine Oils for Valve-Train Wear Performance in Cummins ISB Medium-Duty Diesel Engine |
| ASTM D 3242 : 2023 | Standard Test Method for Acidity in Aviation Turbine Fuel |
| ASTM D 6514 : 2003 : R2019 : EDT 1 | Standard Test Method for High Temperature Universal Oxidation Test for Turbine Oils |
| ASTM D 8111 : 2023 : REV A | Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence IIIH, Spark-Ignition Engine |
| ASTM D 8324 : 2021 | Standard Guide for Selection of Environmentally Acceptable Lubricants for the U.S. Environmental Protection Agency (EPA) Vessel General Permit |
| ASTM D 6751 : 2024 | Standard Specification for Biodiesel Fuel Blendstock (B100) for Middle Distillate Fuels |
| ASTM D 6469 : 2024 | Standard Guide for Microbial Contamination in Fuels and Fuel Systems |
| ASTM D 3487 : 2024 | Standard Specification for Mineral Insulating Liquid Used in Electrical Apparatus |
| ASTM D 8031 : 2016 : R2024 | Standard Test Method for Acid Number of Terephthalic Acid (TA) by Automatic Potentiometric Titration |
| ASTM E 3146 : 2024 | Standard Test Method for Determination of Carbonyls in Pyrolysis Bio-Oils by Potentiometric Titration |
| ASTM D 7549 : 2024 | Standard Test Method for Evaluation of Heavy-Duty Engine Oils under High Output Conditions—Caterpillar C13 Test Procedure |
| ASTM D 8323 : 2024 | Standard Guide for Management of In-Service Phosphate Ester-based Fluids for Steam Turbine Electro-Hydraulic Control (EHC) Systems |
| ASTM D 4175 : 2023 : REV A | Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants |
| ASTM D 4175 : 2024 | Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.