PTC (pheylthiocarbamide) taste test paper test for the genetically controlled ability to taste this substance This will allow for the development of a Pedigree for an individual PTC can taste bland, bitter or even vile depending upon how sensitive your taste buds are to this chemical The bitter taste detected by some individuals, and its intensity, depends upon a homozygous dominant or heterozygous condition in the individuals tested PTC Taste Test Paper is perfectly safe to use Phenylthiocarbamide (PTC) is present at only 3-5 micrograms per strip At this level, the compound is negligible and harmless Cobalt Chloride test paper detects the presence of moisture This test paper is useful in difficult to reach places and recesses Cobalt chloride test paper is responsive to 50% relative humidity and above, and any direct measure of an aqueous solution Phenolphthalein test paper is sensitive to Ammonia Vapors, and thus is used to detect Ammonia leaks, for example, in refrigerators or air conditioners Phenolphthalein detects Ammonia in solution from 3 - 5ppm The test strip will turn a pinkish color if Ammonia is detected