90292-54-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 90292-54-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,2,9 and 2 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 90292-54:
(7*9)+(6*0)+(5*2)+(4*9)+(3*2)+(2*5)+(1*4)=129
129 % 10 = 9
So 90292-54-9 is a valid CAS Registry Number.
90292-54-9Relevant articles and documents
A Three-Step Synthesis of δ-Aminolaevulinic Acid
Herdeis, Claus,Dimmerling, Anna
, p. 304 - 306 (2007/10/02)
Piperidine-2,5-dione (4) is prepared by catalytic hydrogenation of 5-hydroxy-2-pyridone (3).Ring opening of the lactam 4 with concentrated hydrochloric acid yields the hydrochloride of δ-aminolaevulinic acid (2).