Sensory indicators Color: white, or natural crystal luster; Taste and smell: salty, no peculiar smell; Form: crystal, no foreign matter visible with normal vision 2 Physical and chemical indicators Sodium chloride (on a dry basis), g/100g is excellent Grade ≥99.20; Grade 1 ≥98.60 Sulfate radical, g/100g Excellent grade ≤ 0.30; Grade 1 ≤ 0.50 Particle size/(0.30mm～0.85mm), g/100g≥80 Barium (calculated as Ba)/(mg/kg) ≤15 Iodine a (calculated as I)/(mg/kg) In accordance with the provisions of GB26878, the iodine content of uniodized original deep well salt should be less than 5mg/kg, and the word "not iodized" should be marked in a prominent position on the package. 3 Pollution Substance limit: lead (calculated as Pb) ≤ 2.0mg/kg; total mercury (calculated as Hg) ≤ 0.1mg/kg; cadmium (calculated as Cd) ≤ 0.5mg/kg total arsenic (calculated as As) ≤ 0.5mg/kg 4The net content is implemented in accordance with the "Measurement Supervision and Administration Measures for Quantitative Packaged Commodities"