The CAS Registry Mumber 38948-17-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,8,9,4 and 8 respectively; the second part has 2 digits, 1 and 7 respectively. Calculate Digit Verification of CAS Registry Number 38948-17: (7*3)+(6*8)+(5*9)+(4*4)+(3*8)+(2*1)+(1*7)=163 163 % 10 = 3 So 38948-17-3 is a valid CAS Registry Number.
Methylation of carbohydrates with dimsyl potassium in dimethyl sulfoxide
Phillips, Lawrence R.,Fraser, Blair A.
, p. 149 - 152 (2007/10/02)
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