Selenium dioxide

Names

[ CAS No. ]:
7446-08-4

[ Name ]:
Selenium dioxide

[Synonym ]:
Selenium dioxide
Selane, oxo-, oxide
Oxoselane oxide
EINECS 231-957-4
MFCD00134090

Chemical & Physical Properties

[ 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)

[ Water Solubility ]:
H2O: soluble | 38.4 g/100 mL (14 ºC)

MSDS

Toxicological Information

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

[ Symbol ]:

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

Click to get detail synthetic route

Precursor & DownStream

Precursor

Selenic acid
Selenium
ozone
nitric acid
seleninyl bromide seleninyl bromide
selenium chloride
Selenium oxydichloride
diselenium dibromide
Potassium bromate
Potassium iodate

DownStream

Benzeneacetaldehyde,4-methoxy-a-oxo-
2,1,3-Benzoselenadiazole,5-methyl-
1,2,5-selenadiazole-3,4-dicarbonitrile
L-Dehydroascorbic acid
Cyclo-butyl formic acid
Ninhydrin
trans-2-Methyl-2-butenal
2-Buten-1-ol, 2-Methyl-, (2E)-
isoprene
2,6-Dimethylpyridine-4-carboxylic acid

Customs

[ HS Code ]: 2811290090

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diethoxy selenium dioxide
dimethoxy selenium dioxide
selenium dioxide difluoride
Monohydrated selenium dioxide
selenium(II) bis(2-methyl-2-propanethiolate)
Selenium sulfide.
5-[(4-Butoxy-3,5-dimethoxyphenyl)methyl]-2,4-pyrimidinediamine
4-((Cyclohexylamino)methyl)benzoic acid hydrochloride
1-[(2,4-Dichlorophenyl)methyl]-N-(1,1-dimethylethyl)-2-methyl-1H-indole-3-methanamine
2-Methoxy-6-(pyrazol-1-yl)-benzonitrile
1H-3-Benzazepin-7-ol, 8-chloro-2,3,4,5-tetrahydro-5-(3-iodophenyl)-3-methyl-, (S)-
(4-Methyl-tetrahydro-furan-2-yl)-methanol
N-(1-cyanocyclopentyl)-2-[4-(4-fluorobenzenesulfonyl)-1,4-diazepan-1-yl]acetamide
4,5,6,7-Tetrahydrobenzo[d]isoxazole-3-carbaldehyde
tert-Butyl-DL-alanine
4-amino-N-[2-tert-butyl-1-(tetrahydro-2H-pyran-4-ylmethyl)-1H-benzimidazol-5-yl]-N-ethylbenzenesulfonamide