*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : TG7400000
CHEMICAL NAME           : Phosphorous acid, cyclic neopentanetetrayl
                          bis(2,4-di-tert-butylphenyl)ester
CAS REGISTRY NUMBER     : 26741-53-7
BEILSTEIN REFERENCE NO. : 4773772
LAST UPDATED            : 199710
DATA ITEMS CITED        : 6
MOLECULAR FORMULA       : C33-H50-O6-P2
MOLECULAR WEIGHT        : 604.77
SYNONYMS/TRADE NAMES :
   * MARK PEP 24
   * 2,4,8,10-Tetraoxa-3,9-diphosphaspiro(5.5)undecane,  
   3,9-bis(2,4-bis(1,1-dimethylethyl)phenoxy)-
   * Ultranox 624
   * Ultranox 626
   * Weston 626
   * Weston MDW 626
 
                       *** HEALTH HAZARD DATA ***
 
                        ** ACUTE TOXICITY DATA **
 
TYPE OF TEST            : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE       : Oral
SPECIES OBSERVED        : Rodent - rat
DOSE/DURATION           : 5580 mg/kg
TOXIC EFFECTS :
   Details of toxic effects not reported other than lethal dose value
REFERENCE :
   EPASR* United States Environmental Protection Agency, Office of Pesticides
   and Toxic Substances. (U.S. Environmental Protection Agency, 401 M St., SW,
   Washington, DC 20460)  History unknown.  Volume(issue)/page/year:
   8EHQ-1287-0706
 
TYPE OF TEST            : LC50 - Lethal concentration, 50 percent kill
ROUTE OF EXPOSURE       : Inhalation
SPECIES OBSERVED        : Rodent - rat
DOSE/DURATION           : >2 gm/m3
TOXIC EFFECTS :
   Details of toxic effects not reported other than lethal dose value
REFERENCE :
   EPASR* United States Environmental Protection Agency, Office of Pesticides
   and Toxic Substances. (U.S. Environmental Protection Agency, 401 M St., SW,
   Washington, DC 20460)  History unknown.  Volume(issue)/page/year:
   8EHQ-1287-0706
 
TYPE OF TEST            : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE       : Administration onto the skin
SPECIES OBSERVED        : Rodent - rabbit
DOSE/DURATION           : >200 mg/kg
TOXIC EFFECTS :
   Details of toxic effects not reported other than lethal dose value
REFERENCE :
   EPASR* United States Environmental Protection Agency, Office of Pesticides
   and Toxic Substances. (U.S. Environmental Protection Agency, 401 M St., SW,
   Washington, DC 20460)  History unknown.  Volume(issue)/page/year:
   8EHQ-1287-0706

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

NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA :
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - E0783
       No. of Facilities: 66 (estimated)
       No. of Industries: 4
       No. of Occupations: 8
       No. of Employees: 3046 (estimated)
       No. of Female Employees: 2303 (estimated)

                          *** STATUS IN U.S. ***
 
   EPA TSCA Section 8(b) CHEMICAL INVENTORY
   
   EPA TSCA TEST SUBMISSION (TSCATS) DATA BASE, JUNE 1998

 
                            *** END OF RECORD ***