The American Society for Testing and Materials (ASTM) standards shall be used to make the following tests of antifreeze.
- (1) Boiling point test. The boiling point of an antifreeze shall be determined by the ASTM standard test method D1120-17 (2017). The boiling point of a concentrated antifreeze when added to the cooling system of a motor vehicle at atmospheric pressure shall not be below 133° F or 56° C.
- (2) pH test. The pH of an antifreeze shall be determined by the ASTM standard test method D1287-11(2020). The pH of an antifreeze shall not be below 7.5. The pH of an antifreeze shall be run by using a solution composed of 50% concentrated antifreeze and 50% water, by volume.
- (3) Reserve alkalinity test. The reserve alkalinity of an antifreeze shall be determined by the ASTM standard test method D1121-11 (2020). The reserve alkalinity shall not be below 10.0.
- (4) Freezing point test. The freezing point of an antifreeze shall be determined by the ASTM standard test method D1177-17 (2017). The freezing point of the various water antifreeze solutions shall be such as to protect according to the chart in Appendix B of this Chapter.
Added at 9 Ok Reg 2333, eff 6-25-92
Amended at 13 Ok Reg 2409, eff 7-1-96
Amended at 14 Ok Reg 2494, eff 7-1-97
Amended at 34 Ok Reg 929, eff 9-11-17
Amended at 40 Ok Reg 1790, eff 10-1-23