Multiply chlorinity, the amount of chlorine in seawater, by 1.80655 to get this figure
In multiplication and division, the number of significant figures in a 
calculated... [DOC] [TLE] Absolute Salinity - TEOS-10 [PAR] Jan 6, 2011 ... of the notation used and a figure to illustrate the relations ... material in seawater 
in terms of the concentration of halides.