343219-45-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 343219-45-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,3,2,1 and 9 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 343219-45:
(8*3)+(7*4)+(6*3)+(5*2)+(4*1)+(3*9)+(2*4)+(1*5)=124
124 % 10 = 4
So 343219-45-4 is a valid CAS Registry Number.
343219-45-4Relevant articles and documents
The Synthesis of 1-Chloroxanthone and Related Dichloroxanthones
Okabayashi, Ichizo,Iwata, Noriko
, p. 2831 - 2835 (2007/10/02)
1-Chloroxanthone (2) was obtained by cyclization of 2-chloro-6-phenoxybenzoic acid (10) prepared from 2-nitro-6-phenoxybenzoic acid (8) via 2-amino-6-phenoxybenzoic acid (9).Similarly, 1,5-dichloroxanthone (14a) and 1,7-dichloroxanthone (14b) were obtaine
