99-17-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99-17-2 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 9 and 9 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 99-17:
(4*9)+(3*9)+(2*1)+(1*7)=72
72 % 10 = 2
So 99-17-2 is a valid CAS Registry Number.
InChI:InChI=1/C20H22O8/c21-10-13-8-4-5-9-14(13)27-20-18(24)17(23)16(22)15(28-20)11-26-19(25)12-6-2-1-3-7-12/h1-9,15-18,20-24H,10-11H2/t15-,16-,17+,18-,20-/m1/s1