(2E,10E)-(4R,5S,6R,7R,8S)-1-Bromo-7,12-bis-(tert-butyl-dimethyl-silanyloxy)-2,4,6,8,10-pentamethyl-dodeca-2,10-dien-5-ol is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 217640-19-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,7,6,4 and 0 respectively; the second part has 2 digits, 1 and 9 respectively. Calculate Digit Verification of CAS Registry Number 217640-19: (8*2)+(7*1)+(6*7)+(5*6)+(4*4)+(3*0)+(2*1)+(1*9)=122 122 % 10 = 2 So 217640-19-2 is a valid CAS Registry Number.