How much sodium in one teaspoon salt?
One level U.S. teaspoonful of granulated evaporated salt
contains approximately 6,200 mg sodium chloride, or approximately
2,400 mg sodium. The density of granulated evaporated salt varies
depending on crystal size, structure, gradation, and degree of
compaction. The reported range of densities is 1,200-1,300 g/L.
Michaels (1991)[i] uses 1,300-1,315 g/L for Hygrade and Fine salt
from Sifto's Goderich evap plant. Niman (1979)[ii], and Bandy
(1989)[iii] use 1,250 g/L for granulated evaporated salt (loose
bulk density = 800 cc/1,000 g). Niman (1979) gives the density of
Alberger as 624 - 750 g/L depending on gradation. Akzo Salt Inc.
(1992)[iv] gives the density of General Purpose granulated
evaporated salt as 77 lbs/ft3 (1,233 g/L), and of Granulated
Iodized as 75 lb/ft3 (1,201 g/L). Akzo Salt Inc. gives densities
for Alberger Natural Flake Salt as 39-60 lb/ft3 (625-960 g/L), and
Tru-Flake Compacted Flake Salt as 59-70 lb/ft3 (945-1,121 g/L)
depending on gradation. The coarse products are generally of lower
density. Assuming evaporated granulated salt with a density of
1,250 g/L and 1 U.S. teaspoon = 4/93 mL (1 metric teaspoon = 5.0
mL): Salt (NaCl): 1,250 g/L = 1,250 mg/mL x 4.93 mL/U.S. tsp. =
6,162 mg/U.S. tsp.
Sodium: 6,162 mg/U.S. tsp. x 0.39337% Na = 2,424 mg/U.S. tsp. A
simple summary is that about six grams of salt makes a level
teaspoonful and just under 2.4 grams is sodium. This is exactly
correct for salt with a density of 1,217 g/L. Based on a salt
density of 1,250 g/L, one level teaspoon contains approximately
6,200 mg NaCl and approximately 2,400 mg sodium.