131843-52-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 131843-52-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,8,4 and 3 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 131843-52:
(8*1)+(7*3)+(6*1)+(5*8)+(4*4)+(3*3)+(2*5)+(1*2)=112
112 % 10 = 2
So 131843-52-2 is a valid CAS Registry Number.
131843-52-2Relevant articles and documents
153. Azomalonate Syntheses; Part II; Synthesis and Reactivity of Novel 1,2,4-Triazin-5-one Derivatives
Heckendorn, Roland
, p. 1700 - 1718 (2007/10/02)
Base treatment of azomalonates derived from N-substituted dialkyl (2-chloroacetamido)malonates results in the formation of 4-substituted alkyl 5-oxo-1,4,5,6-tetrahydro-1,2,4-triazine-3-carboxylates.The same malonates coupled with diazotized 2-amino-5-chlo