47221-29-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 47221-29-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,7,2,2 and 1 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 47221-29:
(7*4)+(6*7)+(5*2)+(4*2)+(3*1)+(2*2)+(1*9)=104
104 % 10 = 4
So 47221-29-4 is a valid CAS Registry Number.
47221-29-4Relevant academic research and scientific papers
Reactions of 1,2-Benzenedisulfinic Anhydride
Hansen, Holger C.,Kice, John L.
, p. 2943 - 2949 (2007/10/02)
1,2-Benzenedisulfinic anhydride (2) is the first isolable example of an aromatic sulfinic anhydride.Its reaction with simple amines and alcohols is straightforward, the nucleophile (NuH) attacking one of the sulfinyl groups in 2 and forming the ring-opene
