Cresol, also known as methylphenol, is an organic compound consisting of three isomers: ortho-cresol, meta-cresol, and para-cresol. These isomers differ in the position of the methyl group relative to the hydroxyl group on the benzene ring. All cresol isomers are toxic, with ortho-cresol being the most toxic, and are used as disinfectants, preservatives, and chemical intermediates. They are colorless to pale yellow liquids with a characteristic odor and are miscible with water and organic solvents. Cresol isomers are produced by the methylation of phenol and are widely used in the synthesis of various chemicals, such as resins, dyes, and pharmaceuticals. Due to their potential health and environmental risks, proper handling and disposal are essential.
The CAS Registry Mumber 8027-16-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 8,0,2 and 7 respectively; the second part has 2 digits, 1 and 6 respectively. Calculate Digit Verification of CAS Registry Number 8027-16: (6*8)+(5*0)+(4*2)+(3*7)+(2*1)+(1*6)=85 85 % 10 = 5 So 8027-16-5 is a valid CAS Registry Number.