The CAS Registry Mumber 172172-84-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,1,7 and 2 respectively; the second part has 2 digits, 8 and 4 respectively. Calculate Digit Verification of CAS Registry Number 172172-84: (8*1)+(7*7)+(6*2)+(5*1)+(4*7)+(3*2)+(2*8)+(1*4)=128 128 % 10 = 8 So 172172-84-8 is a valid CAS Registry Number.
Get Best Price for172172-84-8(2aS,3R,4aR,5S,6R,7R,7aS,7bR)-7-Acetoxy-4a-hydroxy-6-isopropenyl-7b-methyl-2-oxo-2a,3-bis-trimethylsilanyloxy-decahydro-indeno[7,1-bc]furan-5-carboxylic acid methyl ester