(4aS,8aS)-(-)-4-bromo-4a,5,6,7,8,8a-hexahydro-1,1,3,6,6-pentamethyl-1H-2-benzopyran is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 191656-41-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,6,5 and 6 respectively; the second part has 2 digits, 4 and 1 respectively. Calculate Digit Verification of CAS Registry Number 191656-41: (8*1)+(7*9)+(6*1)+(5*6)+(4*5)+(3*6)+(2*4)+(1*1)=154 154 % 10 = 4 So 191656-41-4 is a valid CAS Registry Number.