5,6,11,13,14,15-Hexamethyl-tricyclo[8.2.2.24,7]hexadeca-1(13),4(16),5,7(15),10(14),11-hexaene is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 77897-18-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,8,9 and 7 respectively; the second part has 2 digits, 1 and 8 respectively. Calculate Digit Verification of CAS Registry Number 77897-18: (7*7)+(6*7)+(5*8)+(4*9)+(3*7)+(2*1)+(1*8)=198 198 % 10 = 8 So 77897-18-8 is a valid CAS Registry Number.