Zinc sulfide - Materials / Alfa Chemistry

NAVIGATION

Zinc sulfide

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Catalog Number

ACMA00021127

Product Name

Zinc sulfide

Category

ZnS

Description

Zinc sulfide appears as a yellowish-white powder in a liquid. Insoluble in water and denser than water. Primary hazard is to the environment. Immediate steps should be taken to limit spread to the environment. Easily penetrates the soil to contaminate groundwater and nearby waterways.;DryPowder; OtherSolid; PelletsLargeCrystals;WHITE-TO-YELLOW CRYSTALS OR POWDER.

IUPAC Name

sulfanylidenezinc

Molecular Weight

97.4g/mol

Molecular Formula

ZnS

InChI

InChI=1S/S.Zn

InChI Key

WGPCGCOKHWGKJJ-UHFFFAOYSA-N

Melting Point

1700 °C

Purity

0.9999

Density

4.1 g/cm³

Solubility

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

Application

Zinc sulfide, a yellowish-white powder available in two crystalline forms-wurtzite and sphalerite-serves a variety of purposes across different industries. When kept dry, it remains stable, and while it is insoluble in water, it dissolves in acids. Primarily, it is utilized as a pigment in paints, oilcloths, linoleum, leather, and dental rubber, often in combination with zinc oxide as "mineral white." In its anhydrous form, zinc sulfide is employed in x-ray screens and luminous dials of watches, as well as in television screens. Additionally, zinc sulfide finds significant use in the plastics industry, particularly in the form of Sachtolith, due to its lightening and hiding power. It effectively colors various thermoplasts without causing abrasion to production machinery or affecting the polymer adversely, even at high operating temperatures. Its soft texture is beneficial in glass-fiber-reinforced plastics as it prevents mechanical fiber damage during production. Furthermore, Sachtolith acts as a dry lubricant, enhancing the longevity of stamping tools for industrial rubber manufacturing and improving the lightfastness and aging resistance of elastomers. It is also used as a dry lubricant for roller and plain bearings, and acts as a white pigment for greases and oils.

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

Composition

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

Compound Is Canonicalized

Yes

Covalently-Bonded Unit Count

Defined Atom Stereocenter Count

Defined Bond Stereocenter Count

Deprecated CAS

37187-67-0, 209065-88-3, 64334-34-5, 714217-01-3

EC Number

215-251-3

Exact Mass

95.901213g/mol

Formal Charge

Heavy Atom Count

Hydrogen Bond Acceptor Count

Hydrogen Bond Donor Count

ICSC Number

1627

Isotope Atom Count

MeSH Entry Terms

sphalerite;zinc sulfide

Monoisotopic Mass

95.901213g/mol

Other Experimental

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

Refractive Index

Index of refraction: 2.356, 2.378 (alpha); 2.368 (beta)

Rotatable Bond Count

RTECS Number

ZH5400000

Stability

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

Topological Polar Surface Area

32.1Å²

Undefined Atom Stereocenter Count

Undefined Bond Stereocenter Count

UN Number