Guaranteed Analysis: Calcium (min.) 0.35%, Calcium (max.) 0.85%, Phosphorus (min.) 0.002%, Salt (min.) 91.0%, Salt (max.) 96.0%, Magnesium (min.) 0.06%, Potassium (min.) 0.03%, Sulfur (min.) 0.07%, Manganese (min.) 5 ppm Zinc (min.) 1 ppm Iron (min.) 300 ppm Copper (min.) 3 ppm Iodine (min.) 10 ppm (A more complete mineral analysis is available upon request) Salt (min 91.0%, max 96.0%), Calcium (min .35%, max .85%), Sulphur .07%, Magnesium .06%, Potassium .03%, Phosphorus .002 %, Iron 300 ppm, Iodine 10 ppm, Manganese 5 ppm, Copper 3 ppm, Zinc 1 ppm (A more complete mineral analysis is available upon request.)