Ice Melt Products listed best to worst

Magnesium Chloride Ice Melt Product Features 2832
o Melts snow and ice faster and at lower temperatures than all others
o Bores down under the ice and snow
o Causes no more damage to concrete than normal tap water
o If used as recommended, this product will not harm vegetation
o Recommended Usage: 4oz per square yard
o Melts down to -25 degrees
o Available in 50 pound bags
 

Calcium Chloride Ice Melt Product Features 2726
o Melts snow and ice about equally to magnesium chloride
o Bores down under the snow
o No harmful effects on concrete
o Vegetation can be effected if used in excess
o If used in excess, can leave a clear, slimy residue. The residue will not track, but can be slick
o Recommended usage: 4oz per sqaure yard
o Melts down to -25 degrees
o Available in 50 lb bags
o Packaging graphics may vary
 

Beneath Zero Ice Melt Product Features 1798
o Made from Ice Melt Salt Crystals encased with liquid Magnesium Chloride
o Has the same effects on concrete and on vegetation as Sodium Chloride
o Magnesium Chloride liquid encasement gives the product a boost to start the melting process
o Will melt to an ambient temperature of 0 to -5 degrees
o Available in 50 lb bags
o Packaging graphics may vary

Rock Salt Ice Melt Product Features 11.50
o Slower working that Calcium Chloride and Magnesium Chloride but faster than Potassium Chloride
o Some damaging effects to concrete
o An overabundance can harm vegetation
o Leaves a white residue that can track into buildings
o Recommended Usage: 8oz per square yard
o Melts down to +15 degrees
o Available in 50 lb bags
 

Potassium Chloride Ice Melt Product Features 1999
o Least effective of all deicers
o Does not chemically attack concrete
o Least harmful to vegetation
o Leaves a powdery white residue
o Recommended usage: 8oz per square yard
o Melts down to +25 degrees
o Available in 50 lb bags
 

Source:    http://www.riverbendtextiles.com/index.asp?PageAction=VIEWCATS&Category=14

Other information: http://www.facilitiesnet.com/groundsmanagement/article/Targeting-Ice-and-Snow--3354