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Sodium selenite

Chemical Properties Application Preparation Category Toxicity grading Acute toxicity Flammability Hazardous Characteristics Storage and Transport Extinguishing agent Occupational standards
Sodium selenite
Sodium selenite structure
Chemical Name:
Sodium selenite
natriumselenit;SODIUM SELENITE;SODIUM SELENIATE;Disodium selenite;Sodiumselenite,99%;SODIUMSELENIUMOXIDE;SODIUMSELENITE,POWDER;sodium selenite .5H2O;SodiumSelenitanhydrous;disodiumseleniumtrioxide
Molecular Formula:
Formula Weight:
MOL File:

Sodium selenite Properties

Melting point:
350 °C
storage temp. 
Store at RT.
Water Solubility 
950 g/L (20 ºC)
CAS DataBase Reference
10102-18-8(CAS DataBase Reference)
EPA Substance Registry System
Selenious acid, disodium salt(10102-18-8)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  T+,N,Xi
Risk Statements  23-28-31-43-51/53-36/37/38
Safety Statements  28-36/37-45-61-28A-36-26
RIDADR  UN 2630 6.1/PG 1
WGK Germany  2
RTECS  VS7350000
HazardClass  6.1
PackingGroup  I
Hazardous Substances Data 10102-18-8(Hazardous Substances Data)
Toxicity LD50 orally in rats: 7 mg/kg (Cummins, Kimura)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H300 Fatal if swallowed Acute toxicity,oral Category 1, 2 Danger P264, P270, P301+P310, P321, P330,P405, P501
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H331 Toxic if inhaled Acute toxicity,inhalation Category 3 Danger P261, P271, P304+P340, P311, P321,P403+P233, P405, P501
H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.
P403+P233 Store in a well-ventilated place. Keep container tightly closed.

Sodium selenite price More Price(13)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 214485 Sodium selenite 99% 10102-18-8 5g $47.4 2018-11-13 Buy
Sigma-Aldrich 214485 Sodium selenite 99% 10102-18-8 100g $101 2018-11-13 Buy
Alfa Aesar 012585 Sodium selenite, anhydrous, 99% min, typically 99.75% min (metals basis) 10102-18-8 100g $59.5 2018-11-16 Buy
Alfa Aesar 012585 Sodium selenite, anhydrous, 99% min, typically 99.75% min (metals basis) 10102-18-8 500g $208 2018-11-16 Buy
Strem Chemicals 93-3414 Sodium selenite, 99% 10102-18-8 250g $161 2018-11-13 Buy

Sodium selenite Chemical Properties,Uses,Production

Chemical Properties

White colored crystalline solid. It could form pentahydrate. It is stable in air and could lose water in dry air. It is soluble in water, insoluble in ethanol. The theoretical selenium content is 45.7%.



(1) Selenite reacts with sodium hydroxide to produce sodium selenite. Further refinement and addition of dilution agent to obtain the final product.
(2) Selenium reacts with nitric acid to produce selenium oxide, which reacts with sodium hydroxide to produce sodium selenite. Followed drying and grinding to obtain the final product.


Toxic substance

Toxicity grading

Highly toxic

Acute toxicity

Oral-rat LD50: 7 mg/kg; oral-mouse LD50: 7.08 mg/kg.

Flammability Hazardous Characteristics

Non-combustible; gives off toxic fume of selenium oxide in a fire.

Storage and Transport

Stored in a well-ventilated area, at low temperature, and dry condition; food should be stored and transported separately.

Extinguishing agent

Sand, water.

Occupational standards

TLV-TWA 0.2 mg (Selenium)/m3; STEL 0.3 mg (Selenium)/m3.

Chemical Properties

White to light beige crystals

Chemical Properties

Sodium selenite is a white crystalline substance.


Used in reducing carcinogenesis with potency greater than selenomethionene


ChEBI: An inorganic sodium salt composed of sodium and selenite ions in a 2:1 ratio.


Removing green color from glass during its manufacture; alkaloidal reagent.

General Description

A white colored crystalline solid. Soluble in water and more dense than water. Contact may irritate skin, eyes and mucous membranes. Toxic by ingestion, inhalation and skin absorption.

Air & Water Reactions

Soluble in water.

Reactivity Profile

Sodium selenite is incompatible with strong acids.


Toxic by ingestion.

Health Hazard

Toxic by ingestion. In humans, a concentration of 5 ppm in food or 0.5 ppm in milk or water has been estimated to be dangerous. Elemental selenium has low acute systemic toxicity, but dust or fumes can cause serious irritation of the respiratory tract.

Fire Hazard

May burn but will not ignite readily. When heated to decomposition, may emit toxic fumes of selenium and sodium oxide. Stable in air.

Safety Profile

Poison by ingestion, intraperitoneal, intravenous, subcutaneous, intracervical, parenteral, and intramuscular routes. Experimental teratogenic and reproductive effects. Questionable carcinogen. Human mutation data reported. When heated to decomposition it emits toxic fumes of Se and Na2O. See also SELENIUM COMPOUNDS.

Potential Exposure

Sodium selenite is used in glass manufacturing and as an alkaloidal reagent; for removing green color from glass during its manufacture; alkaloidal reagent; reagent in bacteriology; testing germination of seeds; decorating porcelain; as a livestock feed additive.

First aid

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit. Wear protective gloves when inducing vomiting. Medical observation is recommended for 24 to 48 hours after breathing overexposure, as pulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consider administering a drug or other inhalation therapy


UN2630 Selenates or Selenites, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.

Purification Methods

Crystallise sodium selenite from a saturated aqueous solution where its solubility is 68% at 20o to give the pentahydrate salt. This yields the anhydrous salt on heating at 40o. [Fehér in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 431 1963].


The aqueous solution is a medium strong base. Reacts with water, strong acids; hot surfaces; causing decomposition and a toxic hazard.

Waste Disposal

Liquid or solid: make a strongly acidic solution using hydrochloric acid. Slowly add sodium sulfite to the cold solution. Stir mixture producing sulfur dioxide. Heat, forming dark-gray selenium and black tellurium. Let stand overnight. Filter and dry. Ship to supplier.

Sodium selenite Preparation Products And Raw materials

Raw materials

Preparation Products

Sodium selenite Suppliers

Global( 174)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Hubei XinRunde Chemical Co., Ltd.
+8615102730682; +8618874586545
02783214688 CHINA 552 55
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 22043 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20786 55
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32651 55
Hefei TNJ Chemical Industry Co.,Ltd.
86-0551-65418684 18949823763
86-0551-65418684 China 1664 55
08657186217390 CHINA 314 58
Chemwill Asia Co.,Ltd.
86-21-51861608;;; CHINA 24118 58
Hubei Jusheng Technology Co.,Ltd.
86-188-71490254 CHINA 20229 58
Haihang Industry Co.,Ltd
+86 531 8582 1093 CHINA 4558 58
Cangzhou Wanyou New Material Technology Co.,Ltd
18631714998 CHINA 244 58

View Lastest Price from Sodium selenite manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2019-04-10 Sodium Selenite
US $1.00-1.00 / g 10Kg/Bag 99% min 100 Kilogram/Kilograms per Month Cangzhou Wanyou New Material Technology Co.,Ltd
2018-08-13 Sodium selenite
US $1.00 / KG 1KG 98% 1ton career henan chemical co
2019-03-01 Sodium Selenite Anhydrous
US $0.00 / kg 25kg 99% 10000 Hefei TNJ Chemical Industry Co.,Ltd.

Sodium selenite Spectrum

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