Is sodium sulfite toxic?

A villager Wang and his daughter in Dingmiao Village, Jiantouji Town, Taierzhuang District, Zaozhuang City suffered from food poisoning. After testing the food they ate, the health supervision department found that they had consumed 59% sodium sulfite. Caused by table salt. It is reported that the sodium sulfite content of edible salt cannot exceed 3%, otherwise it will be regarded as "toxic salt" and cannot be eaten. According to the memories of Wang's subjects, they ate noodles and scrambled eggs with chili on the morning of the incident. The only possible problem was the newly opened package of salt. Director Li Shouzhong of the District Health Supervision Office said that after they learned about it, they immediately tested Wang's edible salt. After testing, the sodium sulfite content of the salt they consumed reached 59%, which was far more than the sodium sulfite content of edible salt. %. He said that sodium sulfite is highly toxic. Ingesting 0.2-0.5 grams of sodium sulfite at one time can cause poisoning, and 3 grams can cause death. The Taierzhuang District Food and Drug Administration Branch immediately organized law enforcement personnel from the Salt Bureau and the Industry and Commerce Bureau to go to Dingmiao Village to investigate and deal with the incident. At the same time, Food Safety Week activities were launched, exhibition boards were produced, promotional materials were distributed, and food hygiene and safety were vigorously promoted. It is reported that there is no difference in appearance between this type of "poisonous salt" and normal edible salt. The biggest difference is whether it is iodized or not. Citizens in areas where iodized salt is consumed can use salt to rub fresh potato strips. If the color becomes darker immediately, it is iodized salt. , otherwise it is best not to eat it. At the same time, citizens must go through formal channels when purchasing salt and pay attention to the identification of anti-counterfeiting marks. The anti-counterfeiting marks of counterfeit salt can be uncovered, but the anti-counterfeiting marks of real salt cannot be uncovered.