Some food safety experts have expressed doubts about the use of additives in rice, although officials said they are free from potential safety hazards.
In response to media reports questioning the revised National Standard for Food Additives, the Ministry of Health issued a statement on Saturday, saying two additives - sodium diacetate and chitosan - were permissible for rice, and that a thickening agent - sodium starch phosphate - can be used in some rice products, such as rice noodles.
In the statement, Wang Zhutian, deputy director of the Fortified Food Office (FFO) under the Chinese Center for Disease Control and Prevention, said sodium diacetate is a widely used preservative in grain, rice and pastry, and chitosan is a coating agent used in rice. Both can help retain freshness and prevent mildew.
The revised regulation, issued early this month, comes into force on June 20.
"The two additives were allowed in rice before 2007, and they passed the safety assessment," Chen Junshi, director of the office, told China Daily on Sunday.
However, some food experts warned that using additives in rice might put food safety at risk, Beijing News reported on Friday.
One expert who wished to remain anonymous was less convinced.
"Rice is a staple food in China as well as a major ingredient for other food products. We must treat the use of rice additives with great caution," the expert was quoted by the newspaper as saying.
Other experts also questioned the need for additives in rice.
"According to the standards for using additives, a substance is used when it is technically indispensable. If rice is rot-resistant without additives, they should not be added," said Sang Liwei, a food-safety lawyer and the China representative of the NGO Global Food Safety Forum.