The CAS Registry Mumber 9049-12-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 9,0,4 and 9 respectively; the second part has 2 digits, 1 and 2 respectively. Calculate Digit Verification of CAS Registry Number 9049-12: (6*9)+(5*0)+(4*4)+(3*9)+(2*1)+(1*2)=101 101 % 10 = 1 So 9049-12-1 is a valid CAS Registry Number.
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(44425) Dowex® Marathon™ 11 chloride form strongly basic