255868-88-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 255868-88-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,5,8,6 and 8 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 255868-88:
(8*2)+(7*5)+(6*5)+(5*8)+(4*6)+(3*8)+(2*8)+(1*8)=193
193 % 10 = 3
So 255868-88-3 is a valid CAS Registry Number.
255868-88-3Relevant articles and documents
Synthesis of meso-tetraaryl-21-oxa-22-thiaporphyrin from 2+2 condensation
Lee, Chang-Hee,Cho, Won-Seob
, p. 8879 - 8882 (1999)
The first synthesis of porphyrin containing oxygen and sulfur adjacent to each other is described. The synthesis utilizes the 2+2 condensation of dipyrromethane and (meso-aryl)furylthienylmethane.
