133559-89-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133559-89-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,5,5 and 9 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 133559-89:
(8*1)+(7*3)+(6*3)+(5*5)+(4*5)+(3*9)+(2*8)+(1*9)=144
144 % 10 = 4
So 133559-89-4 is a valid CAS Registry Number.
133559-89-4Relevant academic research and scientific papers
Chemistry of Benzopentathiepin. Formation of 2-Imino-1,3-benzodithioles from Alkyl or Aryl Isochalcogenocyanates with Benzopentathiepin
Sato, Ryu,Yamaichi, Shizuko
, p. 355 - 358 (2007/10/02)
Various 2-imino-1,3-benzodithioles were synthesized in good yields by the reaction of alkyl or aryl isochalcogenocyanates, R-N=C=X (X=S or Se), with benzopentathiepin in the presence of triethylamine.
