Silicon dioxide manufacturers and suppliers

Silicon dioxide suppliers

Properties

Melting point:: >1600 °C(lit.)

Boiling point:: >100 °C(lit.)

bulk density: 200-800kg/m3

Density: 2.2-2.6 g/mL at 25 °C

vapor pressure: 13.3hPa at 1732℃

refractive index: 1.46

Flash point:: 2230°C

storage temp.: 2-8°C

solubility: Practically insoluble in water and in mineral acids except hydrofluoric acid. It dissolves in hot solutions of alkali hydroxides.

pka: 6.65-9.8[at 20 ℃]

form: suspension

Specific Gravity: 2.2

color: White to yellow

PH: 5-8 (100g/l, H2O, 20℃)(slurry)

Odor: at 100.00?%. odorless

Resistivity: 1∞10*20 (ρ/μΩ.cm)

Water Solubility: insoluble

Sensitive: Hygroscopic

Hydrolytic Sensitivity: 6: forms irreversible hydrate

Crystal Structure: Trigonal

Merck: 14,8493

Exposure limits: NIOSH: IDLH 3000 mg/m3; TWA 6 mg/m3

Stability:: Stable.

CAS DataBase Reference: 7631-86-9(CAS DataBase Reference)

IARC: 3 (Vol. Sup 7, 68) 1997

NIST Chemistry Reference: Silicon(iv) oxide(7631-86-9)

EPA Substance Registry System: Silica (7631-86-9)

Safety Information

Symbol(GHS): GHS07

Signal word: Warning

Hazard statements: H317-H412

Precautionary statements: P261-P272-P273-P280-P302+P352-P333+P313

Hazard Codes: Xn,Xi

Risk Statements: 36/37/38-36/37-22-43-52/53-36/38

Safety Statements: 26-37/39-36-36/37/39-36/37-61

OEB: B

OEL: TWA: 6 mg/m3

HS Code: 2811221000

Toxicity: LC inhalation in rat: > 200gm/m3/1H

IDLA: 3,000 mg/m3

Use

Silicon dioxide occurs almost everywhere on earth. It is one of the most important and abundant oxides on earth, constituting about 60% weight of the earths crust as silica itself or in combination with other metal oxides in silicates. It commonly is found as sand in the vast ocean and river shores, their beds, deserts, rocks, and minerals. Silicon dioxide exists in several structural forms: polymorphic crystalline silica, synthetic quartz crystals, amorphous silica, and vitreous silica. This classification is not complete as there are other forms of silica synthesized for specialized applications.

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