Stannic oxide

Synonym(s):SN516010;Stannic oxide;Tin dioxide;Tin oxide;Tin(IV) oxide

CAS NO.：18282-10-5
Empirical Formula: O2Sn
Molecular Weight: 150.71
MDL number: MFCD00011244
EINECS: 242-159-0
SAFETY DATA SHEET (SDS)
Update Date: 2024-11-15 19:19:13

What is Stannic 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.

The Uses of Stannic oxide

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

The Uses of Stannic oxide

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

The Uses of Stannic oxide

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.

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).

Definition

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

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.

Properties of Stannic oxide

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
Merck	14,8778
Sublimation	1800-1900 ºC
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 information for Stannic oxide

Signal word	Danger
Pictogram(s)	Exclamation Mark Irritant GHS07 Health Hazard GHS08
GHS Hazard Statements	H302:Acute toxicity,oral H317:Sensitisation, Skin H319:Serious eye damage/eye irritation H372:Specific target organ toxicity, repeated exposure
Precautionary Statement Codes	P260:Do not breathe dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P314:Get medical advice/attention if you feel unwell. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.