Stannous Oxide (CAS 21651-19-4)

Molecular structure

Chemical Product

STANNOUS OXIDE

Cat. NoKC.1910324 CategoryOxides Molecular FormulaOSn CAS21651-19-4 Molecular Weight134.71 g/mol

Package 500GM

Safety & Hazards (GHS) Danger

Irritant

Health hazard

⚠️ For information only; not a substitute for the official Safety Data Sheet (SDS).

Tin(II) oxide is an oxide of tin. It is used as a precursor in manufacturing of other, typically divalent, tin compounds or salts, and as a reducing agent and in the creation of ruby glass. Tin is a chemical element with the symbol Sn and atomic number 50. It is a natural component of the earth's crust and is obtained chiefly from the mineral cassiterite, where it occurs as tin dioxide. (L307, L309, L321)

Tin oxides are used in solders, protective coatings, and alloys; [ACGIH] Used as a reducing agent and to make stannous salts; [Merck Index] Used to make gold-tin and copper-tin ruby glass; [INCHEM CICADS]
Abrasive Blasting [Category: Clean]
Metal Preparation and Pouring [Category: Foundry]
Soldering [Category: Heat or Machine]

Physical Description	Tin(ii) oxide appears as brownish-black powder or black to blue-black crystalline solid. Mp: 1080 °C (decomposes); density: 6.45 g cm-3. Insoluble in water.
Melting Point	1976 °F @ 600 mmHg. (Decomposes) (NIOSH, 2024)
Boiling Point	Decomposes (NIOSH, 2024)
Density	6.3 (NIOSH, 2024) - Denser than water; will sink
Solubility	Insoluble (NIOSH, 2024)
Vapor Pressure	0 mmHg (approx) (NIOSH, 2024)

IUPAC Name	oxotin
Molecular Formula	OSn
Molecular Weight	134.71 g/mol
CAS	21651-19-4
SMILES	O=[Sn]
InChIKey	QHGNHLZPVBIIPX-UHFFFAOYSA-N
Catalog No	KC.1910324
Pack sizes	500GM

H302 Harmful if swallowed
H317 May cause an allergic skin reaction
H319 Causes serious eye irritation
H372 Causes damage to organs through prolonged or repeated exposure

⚠️ For information only; not a substitute for the official SDS.

STANNOUS OXIDE

STANNOUS OXIDE

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