Circular 21 - Insecticides and Subsidiary Materials 41 
IODINE 
Iodine is often used as a mild tincture 
to disinfect skin wounds caused by attachment 
of ticks to the body of man or animals. It is 
most effective when applied to the point of 
attachment after the tick has been removed. 
Iodine from which a tincture is im de 
consists of bluish-black scales, having a 
metallic lustre, characteristic odor, and a 
sharp, acrid taste. It attacks metals in the 
presence of moisture and acts slowly on 
organic tissue. It is used in the manufacture 
of iodine compounds, germicides, antiseptics, 
in engraving, and in chemistry. 
Caution : It is poisonous eind should be 
kept tightly closed and plainly marked. 
The price of iodine ranges from ^2.00 
per pound in 50-pound jars to ^2.10 in 5-pound 
bottles. It is also available in smaller 
containers at a slightly higher price. 
Available on contract: see Class 51 > 
General Schedule of Supplies, Procurement 
Division, Treasury Departr^ient . 
lODQj'ORI;! 
Among the uses of this material is the 
preparation of certain louse powders for kill- 
ing lice attacking human beings. The prepara- 
tion and use of some of these powders is 
described in the circular on lice. 
Iodoform or tri-iodomethane (CKIo) 
consists of a yellow powder or crystals 
