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Phenylthiourea (PTC) Test Strip for Genetic Taste Testing, Pack of 3


20 in stock


The ability to taste PTC is a hereditary trait and varies with each individual. PTC paper, which is often used when discussing heredity in biology classes, is paper soaked with phenol thiocarbamide (PTC). The LD50 for PTC is 3.4mg/kg. Such a low LD50 reveals than PTC is a very hazardous substance. The solution to make the taste test paper, contains approximately 500ml of PTC per liter of water. Through some very crude arithmetic, we calculate that each strip of PTC paper would contain approximately 0.3mg of PTC. We estimate that a student weighing about 110 lb. would have to lick (which is how the test is performed) and ingest about 500 2″ x 1/4″ strips of PTC paper to reach the LD50. You will have to determine if you wish to use this taste paper in your classroom. 100/vial



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