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66640-97-9

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66640-97-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 66640-97-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,6,4 and 0 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 66640-97:
(7*6)+(6*6)+(5*6)+(4*4)+(3*0)+(2*9)+(1*7)=149
149 % 10 = 9
So 66640-97-9 is a valid CAS Registry Number.
InChI:InChI=1/C20H23NO4/c1-3-16(23)24-15-7-4-11-10-13-12-5-6-14(22)19-20(12,8-9-21(13)2)17(11)18(15)25-19/h4-7,12-14,19,22H,3,8-10H2,1-2H3/t12-,13?,14-,19-,20-/m0/s1

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