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preface to fifteenth edition

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PHYSICAL PROPERTIES 5.83<br />

5.4 FREEZING MIXTURES<br />

TABLE 5.13<br />

Compositions of Aqueous Antifreeze Solutions<br />

Freezing point of ethyl alcohol-water mixtures*<br />

Specific gravity<br />

20/4C. (68F.)<br />

% alcohol<br />

by weight<br />

% alcohol<br />

by volume<br />

C.<br />

Freezing point<br />

F.<br />

0.99363 2.5 3.13 1.0 30.2<br />

0.98971 4.8 6.00 2.0 28.4<br />

0.98658 6.8 8.47 3.0 26.6<br />

0.9800611.3 14.0 5.0 23.0<br />

0.97670 13.8 17.0 6.1 21.0<br />

0.9733616.4 20.2 7.5 18.5<br />

0.97194 17.5 21.5 8.7 16.3<br />

0.97024 18.8 23.1 9.4 15.1<br />

0.96823 20.3 24.8 10.612.9<br />

0.96578 22.1 27.0 12.2 10.0<br />

0.96283 24.2 29.5 14.0 6.8<br />

0.95914 26.7 32.4 16.0 3.2<br />

0.95400 29.9 36.1 18.9 2.0<br />

0.94715 33.8 40.5 23.6 10.5<br />

0.93720 39.0 46.3 28.7 19.7<br />

0.92193 46.3 53.8 33.9 29.0<br />

0.90008 56.1 63.6 41.0 41.8<br />

0.86311 71.9 78.2 51.3 60.3<br />

Freezing point of methyl (wood) alcohol-water mixtures*<br />

Specific gravity<br />

15.6C. (60F.)<br />

% alcohol<br />

by weight<br />

% alcohol<br />

by volume<br />

C.<br />

Freezing point<br />

F.<br />

0.993 3.9 5 2.2 28<br />

0.9868.1 10 5.0 23<br />

0.980 12.2 15 8.3 17<br />

0.974 16.4 20 11.7 11<br />

0.968 20.6 25 15.64<br />

0.963 24.9 30 20.0 4<br />

0.95629.2 35 25.0 13<br />

0.949 33.640 30.0 22<br />

0.942 38.0 45 35.6 32<br />

* Values are for pure alcohol. Since some commercial antifreezes contain small amounts of water, slightly higher volume<br />

concentrations than those given in the table may be required. Antifreezes also contain corrosion inhibi<strong>to</strong>rs and other additives <strong>to</strong><br />

make them function properly as cooling liquids. These affect freezing point slightly and specific gravity <strong>to</strong> a greater degree. If<br />

a protection table is furnished by the manufacturer it should be used in preference <strong>to</strong> the values given above for the pure substance.

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