Thymol Blue is a chemical substance, the molecular formula is C27H30O5S.

Basic Introduction Drug Name ： Thymol Blue Alias ： Muscimol Blue;Thymol Blue;Thymol Sulfonphthalein;Muscimol Sulfonphthalein Foreign Name ：Thymol blue Whether Prescription ：Nonprescription Drugs Basic Information, Description of Properties, Solubility, Preparation Sources, Other Information, Physical Parameters Thymol blue, Usage Description, Storage and Transportation, Hazard Statement, Basic Information Chinese Name: Thymol blue Chinese Alias: musketophenol blue; Thymol blue; Thymolsulfonphthalein; musketophenol sulfonphthalein English Name: Thymol blue English Alias: Thymolsulfonphthalein Grade: IND CAS No.: 76-61-9 Molecular Weight: 466.59 Properties Description Brownish green crystalline powder with odor; dissolved in ethanol as yellow, dissolved in dilute alkaline solution as blue, insoluble in water; maximum absorption wavelength 594(376)nm Dissolution Insoluble in water, dissolved in ethanol as yellow. Preparation Source Prepared by condensation of thymol with o-sulfobenzoic anhydride. Other Information There are two color change ranges: (1) acid range is pH 1.2 to 2.8, from red to yellow; (2) alkali range is pH 8.0 to 9.6, from yellow to blue. Physical parameters Melting point:221-224°C(dec.)(lit.) Description of use Acid-base indicator, pH1.2(red) ~ 2.8(yellow), 8.0(yellow) ~ 9.6(blue). Anionic surfactant indicator, under acidic conditions, it turns reddish purple when it meets anionic surfactant. Thymol blue, cresol red, ethanol, sodium bicarbonate, potassium chloride can be mixed to make bicarbonate indicator, identify the presence of carbon dioxide. Storage and transportation Sealed preservation Hazard statement Safety level:22-24/25