Heptadecanoic acid,
12,12,13,13,14,14,15,15,16,16,17,17,17-tridecafluoro-, methyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 138697-03-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,6,9 and 7 respectively; the second part has 2 digits, 0 and 3 respectively. Calculate Digit Verification of CAS Registry Number 138697-03: (8*1)+(7*3)+(6*8)+(5*6)+(4*9)+(3*7)+(2*0)+(1*3)=167 167 % 10 = 7 So 138697-03-7 is a valid CAS Registry Number.