803-21-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 803-21-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 8,0 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 803-21:
(5*8)+(4*0)+(3*3)+(2*2)+(1*1)=54
54 % 10 = 4
So 803-21-4 is a valid CAS Registry Number.
InChI:InChI=1/C19H24O7/c1-7-4-9(20)14(23)17(2)8(7)5-10(21)19-6-25-18(3)13(19)16(24)26-15(18)11(22)12(17)19/h4,8-9,11-15,20,22-23H,5-6H2,1-3H3/t8-,9?,11+,12+,13-,14?,15-,17-,18-,19+/m0/s1