1,2-dihydro-5-methoxy-1-methylbenzocyclobutene is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 71644-63-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,6,4 and 4 respectively; the second part has 2 digits, 6 and 3 respectively. Calculate Digit Verification of CAS Registry Number 71644-63: (7*7)+(6*1)+(5*6)+(4*4)+(3*4)+(2*6)+(1*3)=128 128 % 10 = 8 So 71644-63-8 is a valid CAS Registry Number.