Xanthene Dyes 



207 



TlO 



CHj 



CORIPHOSPHINE O 



H 



1 

 N /\ 



C. I. NO. 787 



\ /' 



N' 



CHa 



H 



/ 



N— H 



\ 

 CI 



CH3 



Tl5 



-c=" 



I 



H 



CieHisNsCl; Mol. Wt. 287.785 



[A basic dye; absorption maxima about 64-3, 4-82 {Formdnek)] 



ACRIDINE ORANGE NO C. I. NO. 788 



Synonyms: Basic orange 3RN. Euchrysine 3RXA. 



CHg 



CH3 



H 



N 



CH2 



/ 



CI 



C^ 



I 



H 



C17H20N3CI; Mol. Wt. 301.811 



[A basic dye, ordinarily obtained as the zinc chloride double salt; 

 absorption maxima about {467) 4-97 (Formdnek)] 



Both of these dyes are among those employed as fluorochromes 

 by Metcalf and Patton (1944). Strugger (1948) has used acridine 

 orange for demonstrating bacteria in soil suspensions, by means 

 of ultraviolet light; bacteria are green, humus particles red. Their 

 chief use, in fact, is as fluorochromes; but acridine orange has re- 

 cently attracted some attention because it stains tumor cells 

 selectively, intra vitam, and causes retardation of tumor growth 

 (Lewis and Goland, 1948). 



t20 



H5C2— O 



RIVANOL 



H 



^N— O— CO CHOHCH3 

 H 



H 



I 



N 



~C= 



1 

 NH2 



C18H21N3O4; Mol. Wt. 343.372 



This has also been called for by the two authors above men- 

 tioned, as a fluorochrome. 



