*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : ZG1925000
CHEMICAL NAME           : Ytterbium
CAS REGISTRY NUMBER     : 7440-64-4
LAST UPDATED            : 199701
DATA ITEMS CITED        : 2
MOLECULAR FORMULA       : Yb
MOLECULAR WEIGHT        : 173.04
WISWESSER LINE NOTATION :  YB
COMPOUND DESCRIPTOR     : Tumorigen
 
                       *** HEALTH HAZARD DATA ***
 
                          ** TUMORIGENIC DATA **
 
TYPE OF TEST            : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE       : Implant
SPECIES OBSERVED        : Rodent - mouse
DOSE/DURATION           : 25 gm/kg
TOXIC EFFECTS :
   Tumorigenic - equivocal tumorigenic agent by RTECS criteria
   Tumorigenic - tumors at site of application
REFERENCE :
   PSEBAA Proceedings of the Society for Experimental Biology and Medicine.
   (Academic Press, Inc., 1 E. First St., Duluth, MN 55802)  V.1-    1903/04-
   Volume(issue)/page/year: 135,426,1970

                          *** STATUS IN U.S. ***
 
   EPA TSCA Section 8(b) CHEMICAL INVENTORY

 
                            *** END OF RECORD ***