31237-11-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31237-11-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,2,3 and 7 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 31237-11:
(7*3)+(6*1)+(5*2)+(4*3)+(3*7)+(2*1)+(1*1)=73
73 % 10 = 3
So 31237-11-3 is a valid CAS Registry Number.
31237-11-3Relevant academic research and scientific papers
Synthesis and Structure of Phenylazohydroquinones
Pardo, Mercedes,Joos, Karlheinz,Schaefer, Wolfram
, p. 99 - 111 (2007/10/02)
Phenylazohydroquinones 3, 4 (and not hydrazinoquinones) have been synthesized from 2,5-bis(arylamino)-1,4-benzoquinone-3-carboxylic acids 1 and hydrazines 2; the structure of 3 and 4 was confirmed by spectroscopic (IR, UV, 1H-NMR, and 13C-NMR) data.
