(1S,3aR,4S,7aR)-3a,4-Dimethyl-3,8-dioxo-2,3,3a,4,5,7a-hexahydro-1H-1,4-methano-indene-6,7-dicarbonitrile is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 75190-81-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,1,9 and 0 respectively; the second part has 2 digits, 8 and 1 respectively. Calculate Digit Verification of CAS Registry Number 75190-81: (7*7)+(6*5)+(5*1)+(4*9)+(3*0)+(2*8)+(1*1)=137 137 % 10 = 7 So 75190-81-7 is a valid CAS Registry Number.