150 samples were divided into 6 food groups; 150 producers and traders, and 281 consumers were interviewed about the using of borax in 6 food groups. The results showed that: borax was present in 37.3% of samples, the highest was in rice cakes "banh te" (68%), pork ham "gio cha" (63%); noodles and vermicelli (12%) and the lowest was in rice steamed rolls "banh cuon" 4.3%.