*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : VV8853000
CHEMICAL NAME           : Silicic acid (polyortho)
CAS REGISTRY NUMBER     : 1343-98-2
LAST UPDATED            : 199710
DATA ITEMS CITED        : 6
SYNONYMS/TRADE NAMES :
   * Cubosic
   * G 952
   * H-Ilerit
   * Hydrosilisic acid
   * K 60
   * K 60 (silicate)
   * K 320DS
   * Mikronisil
   * Neoxyl ET
   * Polyorthosilicic acid
   * Polysilicic acid
   * Silica acid
   * Silicic acid hydrate
   * Silicon hydroxide
   * Silton TF 06
   * Sipernat 17
   * Sipernat 50
   * Sipernat D 10
   * Sipernat S
   * Sipernat 50S
   * Sizol 030
   * Vulcasil S/GR
   * Zeosil 45
 
                       *** HEALTH HAZARD DATA ***
 
                 ** OTHER MULTIPLE DOSE TOXICITY DATA **
 
TYPE OF TEST            : TCLo - Lowest published toxic concentration
ROUTE OF EXPOSURE       : Inhalation
SPECIES OBSERVED        : Rodent - rat
DOSE/DURATION           : 680 mg/m3/6H/2W-I
TOXIC EFFECTS :
   Lungs, Thorax, or Respiration - fibrosis, focal (pneumoconiosis)
   Lungs, Thorax, or Respiration - changes in lung weight
   Related to Chronic Data - death
REFERENCE :
   FCTOD7 Food and Chemical Toxicology.  (Pergamon Press Inc., Maxwell House,
   Fairview Park, Elmsford, NY 10523)  V.20-    1982- Volume(issue)/page/year:
   29,341,1991
 
TYPE OF TEST            : TCLo - Lowest published toxic concentration
ROUTE OF EXPOSURE       : Inhalation
SPECIES OBSERVED        : Rodent - rat
DOSE/DURATION           : 35 mg/m3/6H/13W-I
TOXIC EFFECTS :
   Lungs, Thorax, or Respiration - other changes
   Lungs, Thorax, or Respiration - changes in lung weight
   Nutritional and Gross Metabolic - weight loss or decreased weight gain
REFERENCE :
   FCTOD7 Food and Chemical Toxicology.  (Pergamon Press Inc., Maxwell House,
   Fairview Park, Elmsford, NY 10523)  V.20-    1982- Volume(issue)/page/year:
   29,341,1991

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

NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA :
   NOHS - National Occupational Hazard Survey (1974)
     NOHS Hazard Code - 80288
       No. of Facilities: 478 (estimated)
       No. of Industries: 20
       No. of Occupations: 16
       No. of Employees: 3828 (estimated)
   
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - 80288
       No. of Facilities: 6758 (estimated)
       No. of Industries: 58
       No. of Occupations: 70
       No. of Employees: 111636 (estimated)
       No. of Female Employees: 28296 (estimated)

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

 
                            *** END OF RECORD ***