COAL-TAR AND WATER-GAS TAR CREOSOTES. 105 
Table 38. — Specifications for ivater-gas tar products to be used with zinc chloride. 
Requirements. 
Distillate oil 
Water-gas-tar solution. 
Composition 
Water content 
Insoluble in benzol 
Specific gravity at 38° C. referred to water at 
15.5° C. 
Distillates up to 210° C 
Distillates up to 235° C : 
Distillates up to 355° C 
Specific gravity of fraction at 38° C. referred 
to water at 18. 5: 
Fraction 235° to 315° C 
Float test must not exceed 50 seconds at 70° 
C. if the distillation residue at 355° C. ex- 
ceeds. 
Coke residue 
A pure distillate of water- 
gas tar. 
N. M. 3 per cent *. 
N. M. 0.5 per cent. 
►N. L. 1.022 
N. M. 5 per cent.. 
N. M. 25 per cent. 
N. L. 80 per cent. 
60 per cent distillate of water- 
gas tar; 40 per cent refined 
or filtered water-gas tar. 
N. M. 3 per cent. 
N. M. 2 per cent. 
fN.L. 1.03. 
IN. M. 1.07. 
N. M. 8 per cent. 
N. M. 20 per cent. 
N. L. 60 per cent. 
{S 
. L. 0.98 N. L. 0. 98. 
N. M. 1.02 N. M. 1.02. 
5 per cent ! 5 per cent. 
N. M. 2 per cent N. M. 10 per cent. 
N. M.=Not more than. 
2 N. L.=Not less than. 
'i 
