135639-34-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 135639-34-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,5,6,3 and 9 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 135639-34:
(8*1)+(7*3)+(6*5)+(5*6)+(4*3)+(3*9)+(2*3)+(1*4)=138
138 % 10 = 8
So 135639-34-8 is a valid CAS Registry Number.
135639-34-8Relevant articles and documents
Synthesis of sapphyrins, heterosapphyrins, and carbasapphyrins by a "4 + 1" approach
Richter, Daniel T.,Lash, Timothy D.
, p. 8842 - 8850 (2004)
Sapphyrins are an important group of expanded porphyrins that show valuable anion binding characteristics. In this study, a "4 + 1" route to sapphyrin systems has been developed. Reaction of dialdehydes with a known tetrapyrrole intermediate 11b incorpora
