127664-03-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 127664-03-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,7,6,6 and 4 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 127664-03:
(8*1)+(7*2)+(6*7)+(5*6)+(4*6)+(3*4)+(2*0)+(1*3)=133
133 % 10 = 3
So 127664-03-3 is a valid CAS Registry Number.
127664-03-3Relevant articles and documents
REACTION OF 9-HYDROXY(CHLORO, BROMO)-4-AZAFLUORENE TO BIS
Prostakov, N. S.,Kruglyak, E. V.,Shalimov, V. P.,Sergeeva, N. D.
, p. 63 - 65 (1990)
4-Aza-fluoren-9-ol and 9-chloro(bromo)-4-azafluorenes are converted in high yields upon refluxing with thionyl chloride to form bis.At about 20 deg C, azafluorenol and thionyl chloride form 9-chloro-4-azafluorene.Mechanisms are proposed for these reactions.
