Ciroular 21 - Inseoticides ajid Subsidiary Materials 11 
Borax is marketed in carload lots of 
300-poimd bags and in barrels of 300 to 370 
pounds, also in 100-pound kegs and in small 
lots in bottles. In carload lots it runs from 
$48 to $74 a ton. 
Available on contract: See Class 51, 
G-eneral Schedule of Supplies, Procurement 
Division, Treasury Department o 
CALCimi CHLORIDE 
Calcium chloride (CaCl2 ) is used in 
combination with asbestos to make a paste to 
seal cracks and crevices in connection with 
the fumigation of rooms and buildings. A 
technical or commercial grade is sufficiently 
pure for this purpose and considerably cheaper 
than the chemically pure reagent. This salt 
is white, usually granular, very soluble in 
water, and is very hygroscopic, i.e., absorbs 
v/ater readily. Since it combines with moisture 
in the air very readily, calcium chloride must 
be kept in airtight containers. 
Among the many industrial uses for this 
material may be mentioned its importance in the 
manufacture of antifreeze, fire extinguisher 
solutions, cotton fabrics, and rubber. 
Calcium chloride may be purchased in 
paper bags at $20 to $35 per ton in carload 
lots. 
Available on contract: See Class 51| 
General Schedule of Supplies, Procurement 
Division, Treasury Department. 
