Stannic oxide Property

Melting point:

1127 °C

Boiling point:

1800-900°C

Density 

6.95 g/mL at 25 °C(lit.)

refractive index 

1.9968

Flash point:

1800-1900°C

storage temp. 

Store at +5°C to +30°C.

solubility 

Soluble in hot concentrated alkalis, and concentrated acids. Insoluble in alcohol.

form 

nanopowder

color 

White to slightly gray

Specific Gravity

7

PH

4-5 (50g/l, H2O, 20℃)(slurry)

Water Solubility 

INSOLUBLE

Hydrolytic Sensitivity

6: forms irreversible hydrate

Crystal Structure

Rutile type

crystal system

square

Sublimation 

1800-1900 ºC

Merck 

14,8778

Space group

P42/mnm

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.4737	0.4737	0.3185	90	90	90	0.0715

Exposure limits

ACGIH: TWA 2 mg/m3
NIOSH: IDLH 100 mg/m3; TWA 2 mg/m3

Stability:

Stable.

CAS DataBase Reference

18282-10-5(CAS DataBase Reference)

EPA Substance Registry System

Tin dioxide (18282-10-5)

Safety

OEB

B

OEL

TWA: 2 mg/m3

HS Code 

2825908590

Hazardous Substances Data

18282-10-5(Hazardous Substances Data)

Toxicity

LD50 orally in Rabbit: > 20000 mg/kg

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H302Harmful if swallowed

H317May cause an allergic skin reaction

H319Causes serious eye irritation

H372Causes damage to organs through prolonged or repeated exposure

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P314Get medical advice/attention if you feel unwell.

Stannic oxide Chemical Properties,Usage,Production

Description

Stannic oxide, also known as tin oxide, is an inorganic compound consisted of tin and oxygen, which is widely applied in various fields. The dominant usage of stannic oxide is to serve as a precursor in the production of other, especially trivalent, tin compounds or salts. It is also commonly employed as an opacifier in glazes. The addition of larger amounts of stannic oxide enhances the refractoriness of glazes and turns it from transparent to an opaque white. Stannic oxide is also used in the production of customized glass by giving transparent glass an opaque, porcelain-like, opaque appearance. It has proved to be a highly effective polishing material for glass and quarried rock, such as marble, granite and quartz. Besides, stannous oxide can be used for llumination with UV light in combination with cerium oxide in ceramic form. It also has a broad range of applications in other areas, such as semiconductors, photovoltaic materials, solar cells, lithium ion batteries, photocatalysts, and as gas-sensing agents in solid-state detectors.

References

http://sciencing.com/tin-oxide-uses-8125683.html
https://www.alfa.com/zh-cn/catalog/012283/
http://www.azom.com/article.aspx?ArticleID=2358
https://en.wikipedia.org/wiki/Tin(II)_oxide

Chemical Properties

white or off-white powder

Physical properties

White or grayish powder; tetragonal crystals; density 6.85 g/cm³; refractive index 2.006; Mohs hardness 6.5; melts at 1,630°C; insoluble in water; soluble in hot concentrated alkalies.

Uses

It is used to detect carbon monoxide. Used in ceramic glazes and colors, putty, perfume preparations, textiles, polishing powder for steel, and the manufacture of special glasses. Stannic oxide is also used in making white patinas.

Uses

Stannic oxide (SnO2) is a whitish powder used as a ceramic glaze and polishing agent.

Uses

Polishing glass and metals; manufacture of milk-colored, ruby and alabaster glass, enamels, pottery, putty; mordant in printing and dyeing fabrics; in fingernail polishes.

Definition

ChEBI: Tin dioxide is a tin oxide compound consisting of tin(IV) covalently bound to two oxygen atoms.

Preparation

Tin(II) oxide is prepared by heating tin(II) hydroxide. The latter is obtained as a white precipitate by reacting Sn²+ ions with hydroxide ions: Sn₂+(aq) + 2OHˉ(aq) → Sn(OH)₂ (s) Sn(OH)₂ ?→ ?? SnO(s) + H₂O(g).

General Description

White or off-white crystalline solid or powder. Mp 1127°C, Sublimes: 1800-1900°C, density: 6.95 g cm-3. Insoluble in water. Soluble in concentrated sulfuric acid, hydrochloric acid. Occurs in nature as the mineral cassiterite. Used as a catalyst, in putty, as a polishing powder for steel and glass, in ceramic glazes and colors. Flowers of tin refers to the material collected as the result of condensation after sublimation.

Reactivity Profile

TIN(IV) OXIDE is non-flammable and non-combustible. Reacts vigorously with strong reducing agents. Incompatible with chlorine trifluoride.

Purification Methods

Reflux it repeatedly with fresh HCl until the acid shows no tinge of yellow. The oxide is then dried at 110o.