1,5,11-Trioxacyclohexadeca-7,13-diene-2,6,12- trione,9,15-dihydroxy-4,10,16-trimethyl-,(7E,13E)-(+)- is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 199731-57-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,9,7,3 and 1 respectively; the second part has 2 digits, 5 and 7 respectively. Calculate Digit Verification of CAS Registry Number 199731-57: (8*1)+(7*9)+(6*9)+(5*7)+(4*3)+(3*1)+(2*5)+(1*7)=192 192 % 10 = 2 So 199731-57-2 is a valid CAS Registry Number.