91999-13-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91999-13-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,9,9 and 9 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 91999-13:
(7*9)+(6*1)+(5*9)+(4*9)+(3*9)+(2*1)+(1*3)=182
182 % 10 = 2
So 91999-13-2 is a valid CAS Registry Number.
InChI:InChI=1/C25H27IO3/c1-25-13-12-18-17-9-7-16(29-24(28)20-4-2-3-5-22(20)26)14-15(17)6-8-19(18)21(25)10-11-23(25)27/h2-5,7,9,14,18-19,21,23,27H,6,8,10-13H2,1H3/t18-,19-,21+,23+,25+/m1/s1