Selenium dioxide

Modify Date: 2026-07-02 09:05:17

Selenium dioxide Structure
Selenium dioxide structure
 Common Name Selenium dioxide
CAS Number 7446-08-4 Molecular Weight 110.959
Density 3.95 Boiling Point 684.9ºC(lit.)
Molecular Formula O2Se Melting Point 315ºC
MSDS Chinese USA Flash Point 315ºC
Symbol GHS06 GHS08 GHS09
GHS06, GHS08, GHS09		 Signal Word Danger

Summary: Selenium(IV) oxide, also known as selenium dioxide, has CAS number 7446-08-4, with molecular formula O2Se and molecular weight 110.959. It appears as a pale pink solid, with a melting point of 315℃ and boiling point of 684.9℃. It is used for preparing high-purity selenium and other selenium compounds, as an oxidant and catalyst in organic synthesis of drugs. For research-use only, not for medical or clinical usage.

 Names

This table lists Chinese names, IUPAC names and various aliases of this chemical substance.

Name Selenium(IV) oxide
Synonym More Synonyms

 Chemical & Physical Properties

This table shows physicochemical parameters including melting point, boiling point, density, solubility and optical rotation. Missing data is marked as N/A.

Density 3.95
Boiling Point 684.9ºC(lit.)
Melting Point 315ºC
Molecular Formula O2Se
Molecular Weight 110.959
Flash Point 315ºC
Exact Mass 111.906349
PSA 34.14000
Vapour Pressure 1 mm Hg ( 157 °C)
InChIKey JPJALAQPGMAKDF-UHFFFAOYSA-N
SMILES O=[Se]=O
Water Solubility H2O: soluble | 38.4 g/100 mL (14 ºC)

 MSDS

This table provides MSDS information including hazard classification, first‑aid, fire‑fighting, spill handling, operation and storage instructions.

 Toxicological Information

This table summarizes toxicological test data, acute & chronic toxicity and ecological hazard parameters for this chemical.

CHEMICAL IDENTIFICATION

RTECS NUMBER :
VS8575000
CAS REGISTRY NUMBER :
7446-08-4
LAST UPDATED :
199806
DATA ITEMS CITED :
40
MOLECULAR FORMULA :
O2-Se
MOLECULAR WEIGHT :
110.96
WISWESSER LINE NOTATION :
SE O2

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
68100 ug/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - convulsions or effect on seizure threshold
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
3600 ug/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - convulsions or effect on seizure threshold
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
2710 ug/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - convulsions or effect on seizure threshold
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
23300 ug/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - convulsions or effect on seizure threshold
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
4300 ug/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - convulsions or effect on seizure threshold
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
9200 ug/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - convulsions or effect on seizure threshold
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
4 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - gerbil
DOSE/DURATION :
7500 ug/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
160 mg/kg/40D-I
TOXIC EFFECTS :
Kidney, Ureter, Bladder - changes in tubules (including acute renal failure, acute tubular necrosis) Blood - pigmented or nucleated red blood cells Blood - changes in erythrocyte (RBC) count
TYPE OF TEST :
TCLo - Lowest published toxic concentration
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
5500 ng/kg/13W-C
TOXIC EFFECTS :
Blood - changes in serum composition (e.g. TP, bilirubin, cholesterol) Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - true cholinesterase Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - dehydrogenases
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Intraperitoneal
DOSE :
2160 ug/kg
SEX/DURATION :
male 90 day(s) pre-mating
TOXIC EFFECTS :
Reproductive - Paternal Effects - testes, epididymis, sperm duct
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Subcutaneous
DOSE :
5600 ug/kg
SEX/DURATION :
male 1 day(s) pre-mating
TOXIC EFFECTS :
Reproductive - Paternal Effects - testes, epididymis, sperm duct Reproductive - Paternal Effects - prostate, seminal vesicle, Cowper's gland, accessory glands

MUTATION DATA

TYPE OF TEST :
Micronucleus test
TEST SYSTEM :
Fish - not otherwise specified Leukocyte
DOSE/DURATION :
50 ug/L
REFERENCE :
MUREAV Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1964- Volume(issue)/page/year: 320,157,1994 *** REVIEWS *** ACGIH TLV-TWA 0.2 mg(Se)/m3 DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 *** U.S. STANDARDS AND REGULATIONS *** MSHA STANDARD-air:TWA 0.2 mg(Se)/m3 DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: 3,224,1971 OSHA PEL (Gen Indu):8H TWA 0.2 mg(Se)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1910.1000,1994 OSHA PEL (Construc):8H TWA 0.2 mg(Se)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1926.55,1994 OSHA PEL (Shipyard):8H TWA 0.2 mg(Se)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1915.1000,1993 OSHA PEL (Fed Cont):8H TWA 0.2 mg(Se)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 41,50-204.50,1994 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-ARAB Republic of Egypt:TWA 0.2 mg(Se)/m3 JAN 1993 OEL-AUSTRALIA:TWA 0.2 mg(Se)/m3 JAN 1993 OEL-BELGIUM:TWA 0.2 mg(Se)/m3 JAN 1993 OEL-DENMARK:TWA 0.1 mg(Se)/m3 JAN 1993 OEL-FINLAND:TWA 0.1 mg(Se)/m3;STEL 0.3 mg(Se)/m3 JAN 1993 OEL-GERMANY:TWA 0.1 mg(Se)/m3 JAN 1993 OEL-HUNGARY:STEL 0.1 mg(Se)/m3 JAN 1993 OEL-THE NETHERLANDS:TWA 0.2 mg(Se)/m3 JAN 1993 OEL-THE PHILIPPINES:TWA 0.2 mg(Se)/m3 JAN 1993 OEL-POLAND:TWA 0.1 mg(Se)/m3 JAN 1993 OEL-SWEDEN:TWA 0.1 mg(Se)/m3 JAN 1993 OEL-SWITZERLAND:TWA 0.1 mg(Se)/m3 JAN 1993 OEL-TURKEY:TWA 0.2 mg(Se)/m3 JAN 1993 OEL-UNITED KINGDOM:TWA 0.1 mg(Se)/m3 JAN 1993 OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 84447 No. of Facilities: 225 (estimated) No. of Industries: 5 No. of Occupations: 6 No. of Employees: 795 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 84447 No. of Facilities: 237 (estimated) No. of Industries: 10 No. of Occupations: 17 No. of Employees: 5207 (estimated) No. of Female Employees: 823 (estimated)

 Safety Information

This table covers safety warnings, protective measures, incompatible substances and disposal guidelines for this compound.

Symbol GHS06 GHS08 GHS09
GHS06, GHS08, GHS09
Signal Word Danger
Hazard Statements H301 + H331-H373-H410
Precautionary Statements P261-P273-P301 + P310-P311-P501
Personal Protective Equipment Eyeshields;Faceshields;Gloves;type P2 (EN 143) respirator cartridges
Hazard Codes T:Toxic;N:Dangerousfortheenvironment;
Risk Phrases R23/25;R33;R50/53
Safety Phrases S20/21-S28-S45-S60-S61
RIDADR UN 2811/3283
WGK Germany 2
RTECS VS8575000
Packaging Group II
Hazard Class 6.1
HS Code 2811290090

 Synthetic Route

This table presents publicly reported synthetic routes, reaction conditions, reactants and product information of the compound.

 Customs

This table shows customs‑related data including HS‑code, tariff and regulatory conditions for import and export.

HS Code 2811290090

 Articles34

More Articles

This table lists relevant public references with title, journal and publication metadata for this compound.

A Novel Europium Chelate Coated Nanosphere for Time-Resolved Fluorescence Immunoassay.

PLoS ONE 10 , e0129689, (2015)

A novel europium ligand 2,2',2'',2'''-(4,7-diphenyl-1,10-phenanthroline-2,9-diyl) bis (methylene) bis (azanetriyl) tetra acetic acid (BC-EDTA) was synthesized and characterized. It shows an emission s...

Development of an accurate and high-throughput methodology for structural comprehension of chlorophylls derivatives. (I) Phytylated derivatives.

J. Chromatogr. A. 1406 , 99-108, (2015)

Phytylated chlorophyll derivatives undergo specific oxidative reactions through the natural metabolism or during food processing or storage, and consequently pyro-, 13(2)-hydroxy-, 15(1)-hydroxy-lacto...

The inhibitory effect of selenium nanoparticles on protein glycation in vitro.

Nanotechnology 26(14) , 145703, (2015)

Selenium nanoparticles (Se NPs) possess well-known excellent biological activities and low toxicity, and have been employed for numerous applications except as inhibitors to protein glycation. Herein,...

 Synonyms

This table collects all English aliases, systematic names and CAS‑related synonyms of the compound.

Selenium dioxide
Selane, oxo-, oxide
Oxoselane oxide
EINECS 231-957-4
MFCD00134090

 Selenium dioxide | FAQ

This section contains frequently‑asked‑questions about this compound, including basic parameters, properties, storage conditions and corresponding answers.

Q: What is the safety information for Selenium(IV) oxide?
A: Safety information for Selenium(IV) oxide: S20/21-S28-S45-S60-S61.
Q: What is the InChIKey of Selenium(IV) oxide?
A: InChIKey of Selenium(IV) oxide is JPJALAQPGMAKDF-UHFFFAOYSA-N.
Q: What is the melting point of Selenium(IV) oxide?
A: Melting point of Selenium(IV) oxide is 315ºC.
Q: What is the SMILES notation of Selenium(IV) oxide?
A: SMILES notation of Selenium(IV) oxide is O=[Se]=O.
Q: What is the polar surface area (PSA) of Selenium(IV) oxide?
A: Polar surface area (PSA) of Selenium(IV) oxide is 34.14000.
Q: How is the water solubility of Selenium(IV) oxide?
A: Water solubility of Selenium(IV) oxide: H2O: soluble | 38.4 g/100 mL (14 ºC).
Q: What are the downstream products of Selenium(IV) oxide?
A: Related downstream products(CAS) of Selenium(IV) oxide: 1076-95-5;1123-91-7;106013-47-2;490-83-5;3721-95-7;485-47-2;497-03-0;497-02-9;78-79-5;54221-93-1.
Q: What are the upstream materials of Selenium(IV) oxide?
A: Related upstream materials(CAS) of Selenium(IV) oxide: 7783-08-6;7782-49-2;10028-15-6;7697-37-2;7789-51-7;10025-68-0;7791-23-3;1015938-55-2;7758-01-2;7758-05-6.
Q: What is the CAS number of Selenium(IV) oxide?
A: CAS number of Selenium(IV) oxide is 7446-08-4.
Q: What is the molecular formula of Selenium(IV) oxide?
A: Molecular formula of Selenium(IV) oxide is O2Se.

 Selenium dioxidefactory

This table lists manufacturers and suppliers of this compound, including vendor names and product supply reference information.

Dayang Chem (Hangzhou) Co., Ltd.
Henan Tianfu Chemical Co., Ltd.
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