81289-23-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81289-23-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,2,8 and 9 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 81289-23:
(7*8)+(6*1)+(5*2)+(4*8)+(3*9)+(2*2)+(1*3)=138
138 % 10 = 8
So 81289-23-8 is a valid CAS Registry Number.
81289-23-8Relevant academic research and scientific papers
Sodium Borohydride Reduction of 3-Nitro-2-substituted-phenyl-2H-benzopyrans
Arora, P. K.,Bhaduri, A. P.
, p. 951 - 954 (2007/10/02)
Reaction of 3-nitro-2-substituted-phenyl-2H-benzopyrans (1-8) with NaBH4 at 5-10 deg C followed by reduction of the nitro group with hydrazine hydrate in the presence of Raney-nickel furnishes 3-amino-2-substituted-phenyl-3,4-dihydro-2H-benzopyrans
