6621-86-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6621-86-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,6,2 and 1 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 6621-86:
(6*6)+(5*6)+(4*2)+(3*1)+(2*8)+(1*6)=99
99 % 10 = 9
So 6621-86-9 is a valid CAS Registry Number.
6621-86-9Relevant articles and documents
Bromination of 5-substituted 3H-furan-2-ones and 3H-pyrrol-2-ones
Egorova,Sedavkina
, p. 1319 - 1323 (2002)
The bromination of 5-alkyl(aryl)-3H-furan-2-ones and 5-alkyl(aryl)-3H-pyrrol-2-ones and also their derivatives takes place at the ethylene bond with the formation of 4-monobromo derivatives. N-Phenyl-3H-pyrrol-2-ones are brominated simultaneously at the e