IUPAC Name: Disodium selenate decahydrate
The MF of Sodium selenate decahydrate (CAS NO.10102-23-5) is H₂₀Na₂O₁₄Se.

               
The MW of Sodium selenate decahydrate (CAS NO.10102-23-5) is 369.09.
Synonyms of Sodium selenate decahydrate (CAS NO.10102-23-5): Selenic acid, disodium salt, decahydrate ; Sodium selenate decahydrate 
Product Categories: Inorganic Salts;Salts;Sodium Salts;SodiumMetal and Ceramic Science
Apperance: white crystals
EINECS: 236-501-8
Melting Point: 35 °C
Density: 1.6 g/mL
Merck: 14,8671

  Sodium selenate decahydrate (CAS NO.10102-23-5) is used as a mineral supplement,analytical reagents and horticultural pesticides.

Poison by intraperitoneal route. When heated to decomposition it emits toxic fumes of Se.Safety information of Sodium selenate decahydrate (CAS NO.10102-23-5):
Hazard Codes  T,N
Risk Statements 
23/25 Toxic by inhalation and if swallowed
33 Danger of cumulative effects
50/53 Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment
Safety Statements 
20/21 When using, do not eat, drink or smoke
28 After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer)
45 In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)
60 This material and/or its container must be disposed of as hazardous waste
61 Avoid release to the environment. Refer to special instructions safety data sheet
RIDADR  UN 2630 6.1/PG 1
WGK Germany  3
RTECS  VS6720000
HazardClass  6.1
PackingGroup  I

OSHA PEL: TWA 0.2 mg(Se)/m³
ACGIH TLV: TWA 0.2 mg(Se)/m³