I04 CYANAMID — MANUFACTURER, CHEMISTRY AND USES 



"Behavior of Product when Heated. — Two 20-gram test 

 samples were heated in a large porcelain dish by means of a 

 Bunsen burner. The heat was gradually increased until the 

 temperature of the samples was above a bright red heat. 

 During the test a small gas-testing flame was constantly 

 applied to the samples. 



"At the start oil vapors were given off but not in sufficient 

 quantity to form a flame. The samples were decomposed 

 but no material amount of combustion occurred." 



"Test with the Oil Used. — A sample of oil employed in the 

 manufacture of Cyanamid was obtained directly from the 

 manufacturer. Small samples of the oil were also obtained 

 from the product by extraction with petroleum ether. 



''Specific Gravity. — Specific gravity was obtained roughly 

 by means of a Be. hydrometer. The specific gravity was 

 found to be approximately 30° Be. at 19° C. 



''Flashing Point. — The flashing point was determined with 

 the Pensky-Martens tester, the standard method of test with 

 this apparatus being followed. The flashing point was found 

 to be 150° C. (221° F.) closed cup. 



"Evaporation. — An evaporation test was conducted by heat- 

 ing about y2 gram of a sample of the soil, spread out on a 

 watch-glass, for 5 hours at 100° C. in an ordinary oven and 

 determining the loss of weight of the sample. The loss by 

 evaporation was found to be i.i per cent, by weight in 4 

 hours. 



"Spontaneous Heating. — This test was conducted by heating 

 14 grams of the oil, disseminated over 7 grams of cotton, at 

 a temperature of 100° C. for 48 hours in an apparatus con- 

 sisting essentially of a wire gauze cylinder, about i^ inches 

 in diameter and 6 inches long, surrounded by a double- jacketed 

 copper water-bath provided with a tight fitting top, thermom- 

 eter, inlet and outlet tubes to admit air. The oiled cotton was 

 placed in the wire gauze cylinder, and the thermometer in- 



