- 1. 
The process disclosed in these patents is discussed under the head- 
ing "Synthesis" on page 5. 
The adduct C LCL foraed "by combining hexachlarocyclopentadiene 
and cyclopentadiefle in the first step of making chlordane has some 
insecticidal properties. This compound, called chlordene, has been 
patented for use as an insecticide by the Velsicol Corporation ( 475- 
477 ) and derivatives of it, for example, 1-hydroxy chlordene, 1,2- 
dihydroxy chlordene, and 1-acyloxy chlordene have been patented by 
Herzfeld ejt aX. ( 213-215 ) assignors to the Velsicol Corporation. 
GRADES AND SPECIFICATIONS 
There is only one manufacturer of chlordane, the Velsicol Corpora- 
tion, 330 East Grand Avenue, Chicago 11, Illinois, which calls its pro- 
duct "Velsicol 1066". Julius Hyman & Company, Denver, Colorado ; formerly 
made chlordane which was sold under the trade name "Octa-Klor" . On 
May 29, 1950 the United States Supreme Court refused to review the case 
of Julius Hyman, thus making effective a decree affirmed by the Supreme 
Court of Illinois which enjoins Julius Hyman & Company from making and 
selling chlordane. 
The technical chlordane (AG grade) manufactured by the Velsicol 
Corporation ( 478 ) complies with the following specifications: 
Property 
Specific gravity at 60° E./60° F. 
Weight per gallon (lbs.) 
Color (G*rdner-Eellige-1933) 
Viscosity (centistokes at 130° F.) 
Viscosity (SSU at 130° F.) 
Total chlorine content ($) 
Insolubles in deodorized kerosene at 20$ V/V 
The clarified grade is lighter in color than the AG grade, other- 
wise, it6 properties are the same. 
FORMULATIONS OF CHL0RDA12 
The manufacturer of chlordane, the Velsicol Corporation, has 
issued several publications giving detailed directions for the prepara- 
tion of chlordane formulations and these publications should be con- 
sulted by those intending to make a chlordane insecticide. 
Chlordane is commonly employed in the form of solutions, emulsions, 
dusts, and wettable powders. Liquefied gas aerosols of chlordane have 
been tested and found to yield promising results. 
Minimum 
Maximum 
1.600 
1.635 
13.3 
13.6 
— 
14 
45 
70 
209 
324 
64 
66 
— 
None 
