The CAS Registry Mumber 1018989-94-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,1,8,9,8 and 9 respectively; the second part has 2 digits, 9 and 4 respectively. Calculate Digit Verification of CAS Registry Number 1018989-94: (9*1)+(8*0)+(7*1)+(6*8)+(5*9)+(4*8)+(3*9)+(2*9)+(1*4)=190 190 % 10 = 0 So 1018989-94-0 is a valid CAS Registry Number.
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(D-023) N-Desmethyl-cis-tramadol hydrochloride solution 1.0 mg/mL in methanol (as free base), ampule of 1 mL, certified reference material