3aα,4,4a,5,6,7,7aα,8,9,9aα-decahydro-5β-hydroxy-4aβ,8α-dimethylazuleno<6,5-b>furan-2(3H)-one is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 76156-91-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,6,1,5 and 6 respectively; the second part has 2 digits, 9 and 1 respectively. Calculate Digit Verification of CAS Registry Number 76156-91: (7*7)+(6*6)+(5*1)+(4*5)+(3*6)+(2*9)+(1*1)=147 147 % 10 = 7 So 76156-91-7 is a valid CAS Registry Number.