CAS 1314-98-3 Zinc sulfide - Catalysts / Alfa Chemistry

Synonyms

Pigment white 7; Precipitated zinc sulfide; zinc sulfide; Zinc monosulfide; CI 77975

IUPAC Name

Sulfanylidenezinc

Molecular Weight

97.44

Molecular Formula

SZn

Canonical SMILES

S=[Zn]

InChI

1S/S.Zn

InChI Key

WGPCGCOKHWGKJJ-UHFFFAOYSA-N

Boiling Point

1185 °C

Melting Point

1700 °C

Purity

95%+

Density

4.1 g/mL

Solubility

Insol in alkalies; sol in dil mineral acids;0.00069 g/100 cc water at 18 deg C (Alpha); 0.00065 g/100 cc water at 18 deg C (Beta);Solubility in water: none;

Appearance

Powder

Color Form

Exists in two crystalline forms, alpha (wurtzite) and beta (sphalerite);White hexagonal crystals /wurtzite/;Gray-white cubic crystals /sphalerite/;White to grayish-white or yellowish powder colorless cubic crystals;

Complexity

Covalently-Bonded Unit Count

Decomposition

When containing water, it slowly oxidizes in air to sulfate;When heated kto decomposition it emits toxic vapors of zinc and /sulfur oxides/.;

EC Number

215-251-3

Exact Mass

95.901g/mol

H-Bond Acceptor

Heavy Atom Count

ICSC Number

1627

Monoisotopic Mass

95.901g/mol

Other Experimental

Changes to alpha form at 1020 deg C; sublimes at 1180 deg c /beta/;DEPENDING ON IRON (FE) CONTENT, NATURAL SPECIMENS RANGE IN COLOR FROM LIGHT TAN TO BLACK /ZINC SULFIDE MINERAL/;

RTECS Number

ZH5400000

Stability

When containing water, it slowly oxidizes in air to sulfate;Stable if kept dry;

Topological Polar Surface Area

32.1A^2

UN Number

3082

Application

Zinc sulfide, a yellowish-white powder known for its optical properties and environmental durability, serves diverse purposes across industries due to its unique characteristics. It exists in two crystalline forms: α (wurtzite) and β (sphalerite), both stable when dry, transforming to the α form at 1020°C and subliming at 1180°C. Recognized for its high refractive index (~2.35 at 500 nm) and broad transmittance range (400 nm to 14 µm), zinc sulfide is a preferred material for optical coatings in both the IR and VIS spectra. Its acid solubility and water insolubility make it inert yet versatile, used in pigments, fungicidal coatings, and corrosion protection. As a functional additive, it improves the lightfastness and ageing resistance of elastomers and serves as a white pigment in greases and oils. Moreover, zinc sulfide plays a critical role in semiconductors, photo optic applications, and as a friction material, reducing wear on surfaces. It is an essential component in luminous paints, X-ray and television screens, and is widely used as Sachtolith particularly in plastics, where it enhances color without damaging production equipment. The product significantly extends the operating life of stamping tools and can be found in applications ranging from printing inks to flame-resistant plastics and lubricants.

December 29, 2024

Fantastic Optical Material for Research

Zinc sulfide is impressive for optical coatings in our research lab. Its high refractive index and broad transmittance range make it indispensable for IR and VIS applications, offering excellent results with environmental durability. Highly recommended!