26970-82-1

Name Sodium selenite pentahydrate
CAS 26970-82-1
EINECS(EC#) 233-267-9
Molecular Formula H10Na2O8Se
MDL Number MFCD00149173
Molecular Weight 263.01
MOL File 26970-82-1.mol
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Chemical Properties

Appearance White or almost white, crystalline powder, hygroscopic.
solubility  H2O: soluble1g/10 mL, clear, colorless (≤3.5 NTU)
color  White or almost white, crystalline powder, hygroscopic.
PH 9.8-10.8
biological source synthetic
Water Solubility  soluble H2O; insoluble alcohol [HAW93]
InChI InChI=1S/2Na.H2O3Se.5H2O/c;;1-4(2)3;;;;;/h;;(H2,1,2,3);5*1H2/q2*+1;;;;;;/p-2
InChIKey TUANAMBRHOLYTH-UHFFFAOYSA-L
SMILES [Se]([O-])([O-])=O.O.O.O.O.O.[Na+].[Na+]
Uses
Used in treatment of selenium deficiency.
CAS DataBase Reference 26970-82-1(CAS DataBase Reference)

Safety Data

Symbol(GHS)  Skull and Crossbones (GHS06)Environment (GHS09)
GHS06,GHS09
Signal word  Danger
Hazard statements  H300-H317-H331-H411
Precautionary statements  P261-P273-P280-P301+P310-P302+P352-P304+P340+P311
Hazard Codes  T+,N,T
Risk Statements 
R23:Toxic by inhalation.
R28:Very Toxic if swallowed.
R31:Contact with acids liberates toxic gas.
R43:May cause sensitization by skin contact.
R51/53:Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
R50/53:Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
R33:Danger of cumulative effects.
R23/25:Toxic by inhalation and if swallowed .
Safety Statements 
S28:After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer) .
S36/37:Wear suitable protective clothing and gloves .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S61:Avoid release to the environment. Refer to special instructions safety data sheet .
S60:This material and/or its container must be disposed of as hazardous waste .
S20/21:When using, do not eat, drink or smoke .
RIDADR  UN 2630 6.1/PG 1
WGK Germany  2
RTECS  VS7420000
F  3
PackingGroup  I
Storage Class 6.1B - Non-combustible acute toxic Cat. 1 and 2
very toxic hazardous materials
Hazard Classifications Acute Tox. 2 Oral
Acute Tox. 3 Inhalation
Aquatic Chronic 2
Skin Sens. 1
Safety Profile
Poison by intramuscular and intraperitoneal routes. An experimental teratogen. Experimental reproductive effects. When heated to decomposition it emits toxic fumes of Se and Na2O. See also SELENIUM COMPOUNDS.
Toxicity
mouse,LD50,intramuscular,10070ug/kg (10.07mg/kg),International Congress Series--Excerpta Medica. Vol. (440), Pg. 312, 1978.

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