*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : VV8851000
CHEMICAL NAME           : Silicic acid (ortho)
CAS REGISTRY NUMBER     : 10193-36-9
LAST UPDATED            : 199707
DATA ITEMS CITED        : 7
MOLECULAR FORMULA       : H4-O4-Si
MOLECULAR WEIGHT        : 96.13
SYNONYMS/TRADE NAMES :
   * Monosilicic acid
   * Orthosilicic acid
   * Silica, colloidal
   * Silicasol
   * Silicic acid (Si(OH)4)
   * Silicon tetrahydroxide
   * Tetrahydroxysilane
 
                       *** HEALTH HAZARD DATA ***
 
                        ** ACUTE TOXICITY DATA **
 
TYPE OF TEST            : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE       : Intravenous
SPECIES OBSERVED        : Rodent - rat
DOSE/DURATION           : 100 mg/kg
TOXIC EFFECTS :
   Blood - change in clotting factors
REFERENCE :
   BJEPA5 British Journal of Experimental Pathology.  (Blackwell Scientific
   Pub. Ltd., POB 88, Oxford, UK)  V.1-    1920-  Volume(issue)/page/year:
   3,75,1922
 
TYPE OF TEST            : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE       : Intraperitoneal
SPECIES OBSERVED        : Rodent - mouse
DOSE/DURATION           : 40 mg/kg
TOXIC EFFECTS :
   Behavioral - somnolence (general depressed activity)
   Behavioral - tremor
   Behavioral - changes in motor activity (specific assay)
REFERENCE :
   BJEPA5 British Journal of Experimental Pathology.  (Blackwell Scientific
   Pub. Ltd., POB 88, Oxford, UK)  V.1-    1920-  Volume(issue)/page/year:
   3,75,1922
 
TYPE OF TEST            : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE       : Intravenous
SPECIES OBSERVED        : Rodent - mouse
DOSE/DURATION           : 100 mg/kg
TOXIC EFFECTS :
   Behavioral - convulsions or effect on seizure threshold
   Behavioral - muscle weakness
   Blood - change in clotting factors
REFERENCE :
   BJEPA5 British Journal of Experimental Pathology.  (Blackwell Scientific
   Pub. Ltd., POB 88, Oxford, UK)  V.1-    1920-  Volume(issue)/page/year:
   3,75,1922
 
TYPE OF TEST            : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE       : Intravenous
SPECIES OBSERVED        : Rodent - rabbit
DOSE/DURATION           : 100 mg/kg
TOXIC EFFECTS :
   Behavioral - excitement
   Cardiac - other changes
   Lungs, Thorax, or Respiration - other changes
REFERENCE :
   BJEPA5 British Journal of Experimental Pathology.  (Blackwell Scientific
   Pub. Ltd., POB 88, Oxford, UK)  V.1-    1920-  Volume(issue)/page/year:
   3,75,1922
 
TYPE OF TEST            : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE       : Intraperitoneal
SPECIES OBSERVED        : Rodent - guinea pig
DOSE/DURATION           : 120 mg/kg
TOXIC EFFECTS :
   Behavioral - tremor
   Behavioral - ataxia
   Lungs, Thorax, or Respiration - respiratory stimulation
REFERENCE :
   BJEPA5 British Journal of Experimental Pathology.  (Blackwell Scientific
   Pub. Ltd., POB 88, Oxford, UK)  V.1-    1920-  Volume(issue)/page/year:
   3,75,1922
 
TYPE OF TEST            : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE       : Intravenous
SPECIES OBSERVED        : Rodent - guinea pig
DOSE/DURATION           : 100 mg/kg
TOXIC EFFECTS :
   Behavioral - somnolence (general depressed activity)
   Behavioral - tremor
   Behavioral - muscle weakness
REFERENCE :
   BJEPA5 British Journal of Experimental Pathology.  (Blackwell Scientific
   Pub. Ltd., POB 88, Oxford, UK)  V.1-    1920-  Volume(issue)/page/year:
   3,75,1922

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

 
                            *** END OF RECORD ***