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16893-85-9

Basic Information
CAS No.: 16893-85-9
Name: Sodium fluorosilicate
Molecular Structure:
Molecular Structure of 16893-85-9 (Sodium fluorosilicate)
Formula: F6Na2Si
Molecular Weight: 188.06
Synonyms: Silicate(2-),hexafluoro-, disodium (8CI,9CI);Disodium hexafluorosilicate(2-);KFN;Keifuka Soda;Prodan (pesticide);Silicate(2-),hexafluoro-, sodium (1:2);Sodiumfluosilicate;Sodium fluosilicate (Na2(SiF6));Sodium hexafluorosilicate (Na2SiF6);Sodium Fluosilicate;
EINECS: 240-934-8
Density: 2.68 g/mL at 25 °C(lit.)
Melting Point: melts at red heat, decomposing [MER06]
Boiling Point: 620℃[at 101 325 Pa]
Solubility: Slightly soluble in water. Solubility increases with temperature. Insoluble in alcoholSlightly soluble in water. Insoluble in alcohol.
Appearance: white crystalline powder
Hazard Symbols: ToxicT,IrritantXi
Risk Codes: 23/24/25
Safety: 26-45
Transport Information: UN 2674 6.1/PG 3
PSA: 0.00000
LogP: 2.14040
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    CAS No. : 16893-85-9 EINECS No. : 240-934-8 H.S. Code : 2826.901000 Formula : Na2SiF6 Molecular Weight : 188.06 Applications : Used as antiseptic in timber industry, hygroscopic agent of acid-resisting concrete, solidifying agent in natural la

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Chemistry

Structure of Sodium fluorosilicate (CAS NO.16893-85-9):

IUPAC Name: disodium hexafluorosilicon(2-)
Empirical Formula: F6Na2Si
Molecular Weight: 188.06
EINECS: 240-934-8 
Density: 2.68 
Stability: Stable. Incompatible with oxidizing agents, water. Moisture sensitive. 
Product Categories: Inorganic Chemicals;Inorganics;Analytical Reagents for General Use;Puriss p.a.;Q-S, Puriss p.a.;Metal and Ceramic Science;Salts;Sodium Salts 
Synonyms of Sodium fluorosilicate (CAS NO.16893-85-9): Destruxol applex ; Disodium hexafluorosilicate (2-) ; Disodium hexafluorosilicate (8CI)(9CI) ; Disodium silicofluoride ; Ens-zem weevil bait ; Fluorosilicate de sodium ; Natriumhexafluorosilicat ; Natriumsilicofluorid ; Ortho earwig bait ; Ortho weevil bait ; Prodan ; Safsan ;
 Salufer ; Silicon sodium fluoride ; Sodium fluosilicate ; Sodium hexafluorosilicate ; Sodium hexafluosilicate ; Sodium silicofluoride ; Sodium silicon fluoride ; Super prodan

Uses

 Sodium fluorosilicate (CAS NO.16893-85-9) is used as analytical reagent, preservatives, fungicides, also used in the Enamel Industry.

Toxicity Data With Reference

1.    

skn-rbt 500 mg MLD

    FCTOD7    Food and Chemical Toxicology. 20 (1982),563.
2.    

eye-rbt 100 mg SEV

    FCTOD7    Food and Chemical Toxicology. 20 (1982),573.
3.    

eye-rbt 100 mg/4S rns SEV

    FCTOD7    Food and Chemical Toxicology. 20 (1982),573.
4.    

orl-rat LD50:125 mg/kg

    ARSIM*    Agricultural Research Service, USDA Information Memorandum. 20 (1966),21.
5.    

scu-rat LDLo:70 mg/kg

    JPETAB    Journal of Pharmacology and Experimental Therapeutics. 39 (1930),246.
6.    

orl-rbt LDLo:125 mg/kg

    JPETAB    Journal of Pharmacology and Experimental Therapeutics. 39 (1930),246.
7.    

scu-frg LDLo:448 mg/kg

    CRSBAW    Comptes Rendus des Seances de la Societe de Biologie et de Ses Filiales. 124 (1937),133.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Safety Information of Sodium fluorosilicate (CAS NO.16893-85-9):
Hazard Codes:T ,Xi 
Risk Statements:23/24/25
23/24/25:Toxic by inhalation, in contact with skin and if swallowed  
Safety Statements:26-45
26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 
45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) 
RIDADR:UN 2674 6.1/PG 3
WGK Germany:2
RTECS:VV8410000
Hazard Note:Irritant
TSCA:Yes
HazardClass:6.1
PackingGroup:III
Poison by ingestion and subcutaneous routes. A skin and severe eye irritant. An insecticide. When heated to decomposition it emits very toxic fumes of F and Na2O.

Standards and Recommendations

OSHA PEL: TWA 2.5 mg(F)/m3
ACGIH TLV: TWA 2.5 mg(F)/m3; BEI: 3 mg/g creatinine of fluorides in urine prior to shift; 10 mg/g creatinine of fluorides in urine at end of shift.
NIOSH REL: (Inorganic Fluorides) TWA 2.5 mg(F)/m3
DOT Classification:  6.1; Label: KEEP AWAY FROM FOOD