5,11,17,23,29-penta-tert-butyl-31,32,33,34,35-pentamethoxy-2,8,14,20,26-pentabromocalix[5]arene is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 1187817-75-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,8,7,8,1 and 7 respectively; the second part has 2 digits, 7 and 5 respectively. Calculate Digit Verification of CAS Registry Number 1187817-75: (9*1)+(8*1)+(7*8)+(6*7)+(5*8)+(4*1)+(3*7)+(2*7)+(1*5)=199 199 % 10 = 9 So 1187817-75-9 is a valid CAS Registry Number.