136860-34-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 136860-34-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,8,6 and 0 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 136860-34:
(8*1)+(7*3)+(6*6)+(5*8)+(4*6)+(3*0)+(2*3)+(1*4)=139
139 % 10 = 9
So 136860-34-9 is a valid CAS Registry Number.
136860-34-9Relevant articles and documents
Preparation of Novel 9-Oxo-9H-thioxanthene- and 9-Oxo-9H-xanthenedicarboximides and -dicarboxylates
Fischer, Walter
, p. 1119 - 1126 (1991)
By aromatic nucleophilic substitution followed by intramolecular acylation, 9-oxo-9H-thioxanthene- and 9-oxo-9H-xanthene-dicarboximides were prepared from nitro- or chlorophthalimides and the dianions of thiosalicylic and salicylic acids (Scheme).The 9-ox
