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preface to fifteenth edition

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PHYSICAL PROPERTIES 5.85<br />

TABLE 5.13<br />

Compositions of Aqueous Antifreeze Solutions (Continued)<br />

Freezing point of propylene glycol-water mixtures*<br />

Specific gravity<br />

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

% glycol<br />

by volume<br />

C.<br />

Freezing point<br />

F.<br />

1.004 5 1.1 30<br />

1.00610 2.2 28<br />

1.012 15 3.9 25<br />

1.017 20 6.7 20<br />

1.020 25 8.9 16<br />

1.024 30 12.8 9<br />

1.028 35 16.1 3<br />

1.032 40 20.6 5<br />

1.037 45 26.7 16<br />

1.040 50 33.3 28<br />

Freezing point of glycerol-water mixtures†<br />

% Glycerol<br />

by weight<br />

Specific gravity<br />

15/15C. (59F.)<br />

Specific gravity<br />

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

C.<br />

Freezing point<br />

F.<br />

10 1.02415 1.02395 1.629.1<br />

20 1.04935 1.04880 4.8 23.4<br />

30 1.07560 1.07470 9.5 14.9<br />

40 1.10255 1.10135 15.5 4.3<br />

50 1.12985 1.12845 22.0 7.4<br />

60 1.15770 1.15605 33.6 28.5<br />

70 1.18540 1.18355 37.8 36.0<br />

80 1.21290 1.21090 19.2 2.3<br />

90 1.23950 1.23755 1.629.1<br />

100 1.26557 1.26362 17.0 62.6<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.<br />

† The values are those reported by Bosart and Snoddy (Jour. Ind. Eng. Chem., 19, 506(1927)), and Lane (Jour. Ind. Eng.<br />

Chem., 17, 924 (1925)) but modified by adding 2F <strong>to</strong> all temperatures below 0F in accordance with the suggestion of the<br />

Procter and Gamble Co.

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