2-Thiophenecarboxamide,N-(1-ethyl-1H-tetrazol-5-yl)-(9CI) is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 638146-53-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,8,1,4 and 6 respectively; the second part has 2 digits, 5 and 3 respectively. Calculate Digit Verification of CAS Registry Number 638146-53: (8*6)+(7*3)+(6*8)+(5*1)+(4*4)+(3*6)+(2*5)+(1*3)=169 169 % 10 = 9 So 638146-53-9 is a valid CAS Registry Number.
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