42503-27-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42503-27-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,5,0 and 3 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 42503-27:
(7*4)+(6*2)+(5*5)+(4*0)+(3*3)+(2*2)+(1*7)=85
85 % 10 = 5
So 42503-27-5 is a valid CAS Registry Number.
42503-27-5Relevant academic research and scientific papers
The Synthesis of 3H-Pyrazol-3-one Derivatives Containing a 9H-Xanthene Ring
Okabayashi, Ichizo
, p. 1339 (2007/10/02)
2,4-Dihydro-5-methyl-2-phenyl-4-(9H-xanthen-9-yl)-3H-pyrazol-3-one (3) was prepared by the condensation of phenylhydrazine and ethyl α-acetyl-9H-xanthene-9-acetate (2), or 9H-xanthen-9-ol (1) and 2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one (4). 5-Amino
