<h1 class="pgc-h-arrow-right" data-track="1" > rumors:</h1>
In 2018, an article claimed that table salt added potassium ferrocyanide, which was harmful to health.
<h1 class="pgc-h-arrow-right" data-track="31" > truth:</h1>
Potassium ferrocyanide and highly toxic potassium cyanide are two substances, and the addition of potassium ferrocyanide to table salt is harmless to health.
<h1 class="pgc-h-arrow-right" data-track="32" > professional interpretation:</h1>
Potassium ferrocyanide is a common anti-caking agent. Before the advent of refined salt, people ate large grains of salt, which had good fluidity and were not easy to agglomerate. Later, with the continuous improvement of people's living standards, the things eaten became more and more refined, in addition to refined rice, refined noodles, refined oil, even table salt also became refined salt, and large particles of salt were only used when pickling vegetables. However, after the refined salt is opened, it is easy to absorb the moisture in the air, and it is easy to clump after moisture, and sometimes it cannot be crushed by hand, which is not conducive to daily use. Nowadays, the phenomenon of salt agglomeration is basically invisible, because the salt has added an anti-caking agent - potassium ferrocyanide.
Potassium ferrocyanide, commonly known as yellow blood salt potassium, yellow blood salt, is a light yellow crystalline granule. The National Standard for Food Safety and the Standard for the Use of Food Additives stipulate that in addition to potassium ferrocyanide, there are also sodium ferrocyanide, iron ammonium citrate, silicon dioxide, iron tartaric acid and calcium silicate that can be added to salt products.
According to the requirements of China's national standards, the impurities insoluble in water in table salt shall not be higher than 0.2%, and to achieve the ideal anti-caking effect, the amount of silica or calcium silicate should be added to at least 0.3%, so these two anti-caking agents are not suitable for addition to table salt.
In animal trials, animals did not experience any adverse reactions when oral doses of potassium ferrocyanide food reached 25 mg/kg body weight. The International Joint Committee of Experts on Food Additives set a safety ceiling of 0.025 mg/kg body weight when developing safety standards. This is equivalent to a 70 kg person who eats 1.75 mg of potassium ferrocyanide a day and eats it for a lifetime.
The amount of potassium ferrocyanide allowed in table salt allowed by the Chinese national standard is 10 mg/kg. The general recommended daily salt intake is less than 6 grams, and even for extremely heavy tasters, the daily salt intake is more than ten grams. At 20 grams, potassium ferrocyanide is up to 0.2 mg. Therefore, regardless of multiple tastes, the daily intake of potassium ferrocyanide from table salt is still far from the "safe upper limit". Therefore, potassium ferrocyanide added to table salt does not cause harm to the human body.