2H-Pyran-2-one, 4-ethynyl-5,6-dihydro-3-methyl- (9CI) is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 113490-30-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,3,4,9 and 0 respectively; the second part has 2 digits, 3 and 0 respectively. Calculate Digit Verification of CAS Registry Number 113490-30: (8*1)+(7*1)+(6*3)+(5*4)+(4*9)+(3*0)+(2*3)+(1*0)=95 95 % 10 = 5 So 113490-30-5 is a valid CAS Registry Number.