Abstract: Thiocyanate used in raw milk both at China and foreign was summarized. 500 batches in Shanghai were tested and analyzed. 272 batch samples were analyzed and compared. Risk assessment research was developed. The results showed that sodium thiocyanate in raw milk was accord with Pearson5 distribution in general. The percentage of 90 was during 0.2 to 3.71 mg/kg. The maximum, minimum and average value was 9.66, 0.2 and 1.50 mg/kg,respectively. Colony count of 272 batches were during 110 to 1100000 CFU/mL, The percentage of 97.5 was during 110 to 300000 CFU/mL, Sodium thiocyanate content and colony count was not obvious correlation, the content of sodium thiocyanate had no effect on the colony count significantly. Correlation efficient was 0.02. Based on the medium and maximum sodium thiocyanate content, sodium thiocyanate dietary medium and maximum exposure was 0.0025 and 0.016 mg one day for one person. Associated with other risk assessment of sodium thiocyanate, the concentration of sodium thiocyanate in raw milk in Shanghai area was normal physiological concentration. It had no health effects on the human body in normal diet by the study.

Key words: raw milk; sodium thiocyanate; colony count; risk assessment