132221-49-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 132221-49-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,2,2,2 and 1 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 132221-49:
(8*1)+(7*3)+(6*2)+(5*2)+(4*2)+(3*1)+(2*4)+(1*9)=79
79 % 10 = 9
So 132221-49-9 is a valid CAS Registry Number.
132221-49-9Relevant articles and documents
Synthesis and Metastable Structure of New Photochromic Spiroindolinobenzothiopyrans
Hirano, Masafumi,Miyashita, Akira,Nohira, Hiroyuki
, p. 209 - 212 (1991)
Photochromic spiroindolinobenzothiopyrans having a methacryloxymethyl group have been prepared and their colored forms were demonstrated to be a zwitterionic structure on the basis of the spectroscopic data.
