The CAS Registry Mumber 70155-05-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,1,5 and 5 respectively; the second part has 2 digits, 0 and 5 respectively. Calculate Digit Verification of CAS Registry Number 70155-05: (7*7)+(6*0)+(5*1)+(4*5)+(3*5)+(2*0)+(1*5)=94 94 % 10 = 4 So 70155-05-4 is a valid CAS Registry Number.
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(Y0000790) Vinpocetine impurity C European Pharmacopoeia (EP) Reference Standard