* 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
*** 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 ***
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