PTC (phenylthiocarbamide) only has a taste to 7 out of 10 people Perfect for a demonstration of genetics and heredity 30 micrograms of PTC on each strip - safe for taste testing Each strip measures 6mm x 48mm Each vial contains 100 test papers These small, disposable test strips are commonly used to detect the presence of phenylthiocarbamide (PTC) tasting ability. PTC is a chemical compound that some people are able to taste, while others cannot. PTC paper strips are used in various scientific and medical settings to determine whether an individual has the genetic ability to taste PTC. When placed on the tongue, the PTC coated strip dissolves and releases the PTC compound, which interacts with the taste receptors in the mouth. If an individual is able to taste the PTC, they will experience a bitter or unpleasant taste, while those who cannot taste PTC will not notice any particular taste. The PTC paper strips are easy to use and are commonly used in educational settings to demonstrate the principles of genetics and inheritance. They are also used in research studies to explore the genetic basis of taste and other traits. The clear storage vial contains 100 PTC paper strips, each measuring 6mm x 48mm.