1,2,3,5,7,11,13-Cyclotetradecaheptaen-9-yne,
1,8-bis(4-methoxyphenyl)-4,11-diphenyl- is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 69203-16-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,9,2,0 and 3 respectively; the second part has 2 digits, 1 and 6 respectively. Calculate Digit Verification of CAS Registry Number 69203-16: (7*6)+(6*9)+(5*2)+(4*0)+(3*3)+(2*1)+(1*6)=123 123 % 10 = 3 So 69203-16-3 is a valid CAS Registry Number.