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苯硫脲（Phengl thiocarbamrde或Phenyl thiourea简称P.T.C）是由尿素合成的白色结晶化合物,含有呈苦味的硫代酰胺基结构。1931年Fox作P.T.C定量分析时,一起工作的Noller说房内的味道太苦,自己却无比感觉。因而发现人群对它尝味时,可分为能尝出苦味的尝味者和尝不出苦味的味盲者两类人群。1934年Parr发现不同种族的人群味盲者的百分率不同,调查人群中苯硫脲味盲者的百分率,可为人种学和人类群体遗传学提供基本数据,为双生子和亲子鉴定提供参考资料。
Phenyl thiourea (Phengl thiocarbamrde or Phenyl thiourea abbreviation P.T.C) is a white crystalline compound synthesized from urea, containing a bitter taste thio amide structure. When Fox did the quantitative analysis of P.T.C in 1931, Noller, who worked together, said the room tasted so bitter that he felt it. It was found that when the crowd tasted it, it can be divided into two kinds of people who can taste bitter taste tasters and those who can not taste bitter taste blindness. In 1934, Parr found that the percentages of blind persons of different ethnic groups were different. The percentage of blind persons in the surveyed population with phenylthiourea could provide basic data for ethnographic and human population genetics, providing references for twins and paternity tests.