Selenium dioxide manufacturers and suppliers

Selenium dioxide suppliers

Properties

Melting point:: 315 °C (subl.)(lit.)

Boiling point:: 684.9 °C(lit.)

Density: 4.81 g/mL at 25 °C(lit.)

vapor pressure: 1 mm Hg ( 157 °C)

refractive index: nD20 <1.76

Flash point:: 315°C

storage temp.: Store below +30°C.

solubility: H₂O: soluble

form: powder

color: white

Specific Gravity: 3.95

PH: 2 (10g/l, H2O, 20℃)

Water Solubility: 38.4 g/100 mL (14 ºC)

Sublimation: 315 ºC

Merck: 14,8434

crystal system: square

Space group: P42/mbc

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.83622	0.83622	0.50612	90	90	90	0.3539

Exposure limits: ACGIH: TWA 0.2 mg/m3
NIOSH: IDLH 1 mg/m3; TWA 0.2 mg/m3

Stability:: Stable. Incompatible with organic materials, strong acids, ammonia, nitric acid, halogen acids. Protect from moisture.

InChI: 1S/O2Se/c1-3-2

InChIKey: JPJALAQPGMAKDF-UHFFFAOYSA-N

SMILES: O=[Se]=O

CAS DataBase Reference: 7446-08-4(CAS DataBase Reference)

NIST Chemistry Reference: Selenium dioxide(7446-08-4)

EPA Substance Registry System: Selenium dioxide (7446-08-4)

Safety Information

Symbol(GHS): GHS06,GHS08,GHS09

Signal word: Danger

Hazard statements: H300-H331-H319-H372-H370-H410

Precautionary statements: P501-P273-P260-P270-P271-P264-P280-P391-P337+P313-P305+P351+P338-P308+P311-P301+P310+P330-P304+P340+P311-P403+P233-P405

PPE: Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges

Hazard Codes: T,N,Xn

Risk Statements: 36/38-50/53-33-23/25-51/53-20/22

Safety Statements: 26-61-60-45-28A-20/21-28

RIDADR: UN 3440 6.1/PG 3

WGK Germany: 2

RTECS: VS8575000

F: 3

TSCA: TSCA listed

HS Code: 2811 29 90

HazardClass: 6.1

PackingGroup: II

Storage Class: 6.1C - Combustible acute toxic Cat.3
toxic compounds or compounds which causing chronic effects

Hazard Classifications: Acute Tox. 3 Inhalation
Acute Tox. 3 Oral
Aquatic Acute 1
Aquatic Chronic 1
STOT RE 2

Hazardous Substances Data: 7446-08-4(Hazardous Substances Data)

Toxicity: LD50 orally in Rabbit: 68.1 mg/kg

REACH Registrations: Active

Limited Quantities: 5.0 kg (11 lbs) (solid)

Excepted Quantities: Max Inner Pack (30g or 30ml) and Max Outer Pack (1Kg or 1L)

Use

Selenium dioxide is reduced to selenium metal when heated with carbon and other reducing agents. When heated with ammonia, selenium dioxide forms selenium, nitrogen and water: 3SeO2 + NH3 3Se + 2N2 + 6H2O Ammonia reacts with selenium dissolved in ethanol to form ammonium ethyl selenite, NH4(C2H5)SeO3. Reaction with nitric acid forms selenic acid: Se + 2HNO3 H2SeO4 + 2NO Selenium dioxide is reduced by hydrazine to black amorphous selenium: SeO2 + N2H4 Se + N2 + 2H2O Hydroxylamine hydrochloride reduces selenium dioxide to reddish-brown amorphous selenium: SeO2 + 4NH2OHHCl Se + 2N2 + 6H2O + 4HCl The dioxide rapidly absorbs hydrogen halides, forming selenium oxyhalides: SeO2 + HBr SeOBr2 + H2O Reaction with thionyl chloride yields selenium oxychloride: SeO2 + SOCl2 SeOCl2 + SO2

You can find Selenium dioxide suppliers, manufacturers, and distributors from countries such as CHINA, United States and the India here. Browse to the tetrahydrofuran product information displayed by the supplier, as well as the supplier's contact and capability information.