Moreover, the standards in China are stricter than those in the United States. The United States suggests that ferrocyanide below 1.3mg/kg can be added to table salt, while the maximum dosage in China is 10mg/kg. The structure between iron and cyanide in "potassium ferrocyanide" is stable, and it can be decomposed into potassium cyanide only when it is higher than 400, but the daily cooking temperature is "usually" lower than 340, so the possibility of decomposition of potassium ferrocyanide at cooking temperature is extremely small. The recommended daily intake of salt in China is 6g.