Print This Page

Rock Salt (NaCI) Sodium Chloride:

Rock salt or sodium chloride is the most commonly used ice melter. It is inexpensive and melts ice.

Compared to other materials, though, it has limited effectiveness in very cold temperatures. It will not melt ice at temperatures below 20o F, and it may be harmful to vegetation, but is considered safe for concrete.

Common Names

  • Rock Salt
  • Sodium Chloride
  • Halite

HALITE – ROCK SALT

Description: Irregularly shaped sodium chloride crystals.

Relative deicing speed: Slower than calcium chloride.,

Lowest practical temperature: Down to 20° F.

Effect on concrete: Does not chemically attack concrete. Can cause damage from freeze-induced expansion pressures by increasing number of freeze/thaw cycles.

Effect on vegetation: Sodium ion is toxic to vegetation.

Residue: Leaves a white, powdery residue when it dries.

Manufacturer’s recommended application rate: 8 oz/yd.

Comments: Sodium chloride provides adequate economical performance at temperatures at or just below 32° F. As temperatures drop below freezing, its ice-melting performance slows substantially. Most frequently used deicer for highway application; often treated with liquid calcium chloride or mixed with calcium chloride to improve low-temperature performance on highways.

This product is sold in 10#, 25#, 50#, and 80# bags. It is also available in bulk truckloads.

Data Sheets

MSDS SHEET – Sodium Chloride or Rock Salt