20,21-bis<<2-(2-hydroxyethoxy)ethoxy>methyl>-1,4,7,12,15,18-hexaoxacyclodocosa-9,20-diene-9,10-dimethanol 20,21-bis(p-toluenesulfonate) is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 79289-91-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,9,2,8 and 9 respectively; the second part has 2 digits, 9 and 1 respectively. Calculate Digit Verification of CAS Registry Number 79289-91: (7*7)+(6*9)+(5*2)+(4*8)+(3*9)+(2*9)+(1*1)=191 191 % 10 = 1 So 79289-91-1 is a valid CAS Registry Number.
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