TABLE 129.— ANTIFREEZING SOLUTIONS* 135 



(For automobile radiators, etc.) 



Percent by volume in water with freezing points and 

 specific gravities 



Percent by volume 10 20 30 40 50 



Typical commercial methanol 



antifreeze - 5.2°C — 12.0°C -21.1°C - 32.2°C -45.0°C 



Sp. gr. at 15°C/15°C 986 .975 .963 .950 .935 



Typical commercial ethanol 



antifreeze -3.3°C - 7.7°C — 14.2°C -22.0°C -30.6°C 



Sp. gr. at 15°C/15°C 988 .977 .967 .955 .938 



Commercial glycerine t 



antifreeze - 1.6°C - 4.7°C - 9.5°C — 15.4°C -23.0°C 



Sp. gr. at 15°C/15°C 1.023 1.048 1.074 1.101 1.128 



Typical commercial ethylene 



glycol t antifreeze . — 3.8°C — 8.8°C — 15.5°C — 24.3°C — 36.5°C 



Sp. gr. at 15°C/15°C 1.015 1.030 1.045 1.060 1.074 



* This table was prepared from data furnished by F. G. Church, of the National Carbon Co., and A. J. 

 Kathman, of Procter & Gamble Co. t Glycerine and ethylene glycol are practically nonvolatile. All 



types must be suitably inhibited to prevent cooling-system corrosion. Commercial antifreeze solutions 

 based on ethylene glycol (Prestone) and on glycerine (Zerex) are in use at the present time. 



SMITHSONIAN PHYSICAL TABLES 



