1,2,3,4,5,7,9,15,17-Cyclooctadecanonaene-11,13-diyne,
1,6,10,15-tetraphenyl- is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 33815-15-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,8,1 and 5 respectively; the second part has 2 digits, 1 and 5 respectively. Calculate Digit Verification of CAS Registry Number 33815-15: (7*3)+(6*3)+(5*8)+(4*1)+(3*5)+(2*1)+(1*5)=105 105 % 10 = 5 So 33815-15-5 is a valid CAS Registry Number.