127-21-9 Usage
Chemical Properties
Clear colorless liquid
Check Digit Verification of cas no
The CAS Registry Mumber 127-21-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,2 and 7 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 127-21:
(5*1)+(4*2)+(3*7)+(2*2)+(1*1)=39
39 % 10 = 9
So 127-21-9 is a valid CAS Registry Number.
InChI:InChI=1S/C3Cl2F4O/c4-2(6,7)1(10)3(5,8)9
127-21-9Relevant articles and documents
Preparation of α-halo-F-2-ketones and F-2-ketones via fluorination of α,α-dihalo-F-2-ketones
Burton, Donald J.,Jeong, In Howa
, p. 153 - 156 (1993)
Fluorination of α,α-dichloro-F-2-ketones with antimony pentafluoride provided excellent yields of α-chloro-F-2-ketones and F-2-ketones regioselectively.However, fluorination of α,α-dibromo-F-2-ketones with antimony pentafluoride gave a mixture of α-bromo-F-2-ketones and F-2-ketones.