*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : ZG3850000
CHEMICAL NAME           : Yttrium trioxide
CAS REGISTRY NUMBER     : 1314-36-9
LAST UPDATED            : 199712
DATA ITEMS CITED        : 22
MOLECULAR FORMULA       : O3-Y2
MOLECULAR WEIGHT        : 225.82
WISWESSER LINE NOTATION :  YT2 O3
SYNONYMS/TRADE NAMES :
   * Diyttrium trioxide
   * YO 3-245
   * Yttria
   * Yttrium oxide (Y2O3)
   * Yttrium(3+) oxide
   * Yttrium sesquioxide
 
                       *** HEALTH HAZARD DATA ***
 
                        ** ACUTE TOXICITY DATA **
 
TYPE OF TEST            : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE       : Oral
SPECIES OBSERVED        : Rodent - rat
DOSE/DURATION           : >10 gm/kg
TOXIC EFFECTS :
   Details of toxic effects not reported other than lethal dose value
REFERENCE :
   GTPZAB Gigiena Truda i Professional'nye Zabolevaniya.  Labor Hygiene and
   Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR)
   V.1-36, 1957-1992. For publisher information, see MTPEEI
   Volume(issue)/page/year: 22(7),55,1978
 
TYPE OF TEST            : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE       : Intraperitoneal
SPECIES OBSERVED        : Rodent - rat
DOSE/DURATION           : 230 mg/kg
TOXIC EFFECTS :
   Details of toxic effects not reported other than lethal dose value
REFERENCE :
   85GMAT "Toxicometric Parameters of Industrial Toxic Chemicals Under Single
   Exposure," Izmerov, N.F., et al., Moscow, Centre of International Projects,
   GKNT, 1982  Volume(issue)/page/year: -,121,1982
 
TYPE OF TEST            : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE       : Oral
SPECIES OBSERVED        : Rodent - mouse
DOSE/DURATION           : >6 gm/kg
TOXIC EFFECTS :
   Details of toxic effects not reported other than lethal dose value
REFERENCE :
   GTPZAB Gigiena Truda i Professional'nye Zabolevaniya.  Labor Hygiene and
   Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR)
   V.1-36, 1957-1992. For publisher information, see MTPEEI
   Volume(issue)/page/year: 22(7),55,1978
 
TYPE OF TEST            : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE       : Intraperitoneal
SPECIES OBSERVED        : Rodent - mouse
DOSE/DURATION           : 430 mg/kg
TOXIC EFFECTS :
   Details of toxic effects not reported other than lethal dose value
REFERENCE :
   85GMAT "Toxicometric Parameters of Industrial Toxic Chemicals Under Single
   Exposure," Izmerov, N.F., et al., Moscow, Centre of International Projects,
   GKNT, 1982  Volume(issue)/page/year: -,121,1982
 
                 ** OTHER MULTIPLE DOSE TOXICITY DATA **
 
TYPE OF TEST            : TCLo - Lowest published toxic concentration
ROUTE OF EXPOSURE       : Inhalation
SPECIES OBSERVED        : Rodent - rat
DOSE/DURATION           : 10 mg/m3/6H/17W-I
TOXIC EFFECTS :
   Blood - change in clotting factors
   Blood - changes in cell count (unspecified)
REFERENCE :
   GTPZAB Gigiena Truda i Professional'nye Zabolevaniya.  Labor Hygiene and
   Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR)
   V.1-36, 1957-1992. For publisher information, see MTPEEI
   Volume(issue)/page/year: 22(7),55,1978

                              *** REVIEWS ***
 
   ACGIH TLV-TWA 1 mg(Y)/m3
   DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices
   (BEIs) booklet issues by American Conference of Governmental Industrial
   Hygienists (ACGIH), Cincinnati, OH, 1996  Volume(issue)/page/year:
   TLV/BEI,1997

   TOXICOLOGY REVIEW
   JPMSAE Journal of Pharmaceutical Sciences.  (American Pharmaceutical Assoc.,
   2215 Constitution Ave., NW, Washington, DC 20037)  V.50-    1961-
   Volume(issue)/page/year: 54,663,1965

                    *** OCCUPATIONAL EXPOSURE LIMITS ***
 
   OEL-AUSTRALIA:TWA 1 mg(Y)/m3 JAN 1993
   
   OEL-BELGIUM:TWA 1 mg(Y)/m3 JAN 1993
   
   OEL-DENMARK:TWA 1 mg(Y)/m3 JAN 1993
   
   OEL-FINLAND:TWA 1 mg(Y)/m3 JAN 1993
   
   OEL-FRANCE:TWA 1 mg(Y)/m3 JAN 1993
   
   OEL-GERMANY:TWA 5 mg(Y)/m3 JAN 1993
   
   OEL-THE NETHERLANDS:TWA 1 mg(Y)/m3 JAN 1993
   
   OEL-THE PHILIPPINES:TWA 5 ppm (25 mg(Y)/m3) JAN 1993
   
   OEL-RUSSIA:STEL 2 ppm JAN 1993
   
   OEL-SWITZERLAND:TWA 1 mg(Y)/m3 JAN 1993
   
   OEL-UNITED KINGDOM:TWA 1 mg(Y)/m3;STEL 3 mg(Y)/m3 JAN 1993
   
   OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV
   
   OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV

         *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA ***

NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA :
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - X2924
       No. of Facilities: 6 (estimated)
       No. of Industries: 2
       No. of Occupations: 3
       No. of Employees: 1414 (estimated)
       No. of Female Employees: 540 (estimated)

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

 
                            *** END OF RECORD ***