Strontium sulfide Property

Melting point:

>2000 °C(lit.)

Density 

3,7 g/cm³

solubility 

slightly soluble in H2O; soluble in acid solutions

form 

Powder

Specific Gravity

3.7

color 

Gray

Water Solubility 

Slightly soluble in water. Decomposes in acids

Sensitive 

Hygroscopic

Merck 

14,8849

Stability:

Stable. Incompatible with acids.

CAS DataBase Reference

1314-96-1(CAS DataBase Reference)

EPA Substance Registry System

Strontium sulfide (1314-96-1)

Safety

Hazard Codes 

C

Risk Statements 

31-34

Safety Statements 

26-36/37/39-45

RIDADR 

UN 3262 8/PG 3

WGK Germany 

3

TSCA 

Yes

HazardClass 

4.3

PackingGroup 

III

HS Code 

2830908500

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H314Causes severe skin burns and eye damage

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

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

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

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

P310Immediately call a POISON CENTER or doctor/physician.

P405Store locked up.

Strontium sulfide Chemical Properties,Usage,Production

Chemical Properties

Strontium sulfide is a grey powder giving a hydrogen sulphide-like smell in the air. It is insoluble in cold water, and decomposes in hot water and acid. In the wet air can decompose to H2S, can also be oxidised to SrSO4. heating for 3 hours to light red, and water vapour contact with the formation of SrO, SrSO4, H2 and SO2. reaction with acid to produce H2S.

Uses

Strontium sulfide (SrS) smells like rotten eggs. It is used as a depilatory to remove hair from skin and hides or In luminous paints.

Production Methods

Strontium sulfide, grayish-white solid (thermodynamic Ksp 500) reactive with water to form strontium hydrosulfide, Sr(SH)2, solution. Strontium hydrosulfide is formed (1) by reaction of strontium sulfide and H2O, (2) by saturation of strontium hydroxide solution with H2S. Strontium polysulfides are formed by boiling strontium hydrosulfide with sulfur.

Preparation

Strontium sulfide can be prepared by the direct reaction of the elements, calcined in an inert atmosphere, at a 1:1.05 molecular ratio:
Sr＋S＋heat→SrS
SrS can also be produced by the “carbothermic reduction” of calcium sulfate, which entails the conversion of carbon, usually as charcoal, to CO2:
SrSO4＋2C→SrS＋ 2CO2
This can react further:
3SrSO4＋SrS→4SrO＋ 4SO2
A mixture of oxide-sulfide is the result. Thus, this type of preparation cannot be used to prepare a pure SrS salt.

General Description

Gray powder with an odor of H2S in moist air.

Air & Water Reactions

Slowly releases H2S in moist air.

Reactivity Profile

STRONTIUM SULFIDE reacts vigorously with acids to release hydrogen sulfide gas. May react exothermically with oxidizing agents including inorganic oxoacids, organic peroxides and epoxides, and inorganic peroxides to generate toxic gases.

Hazard

Moderate fire and explosion risk. Irritant to skin and tissues.

Health Hazard

ACUTE/CHRONIC HAZARDS: Irritant to skin and tissue. Moderate fire hazard and explosion risk.

Flammability and Explosibility

Non flammable

Safety Profile

Poison by inhalation and ingestion. Ready decomposes to yield H2S. Incompatible with lead(1V) oxide. When heated to decomposition it emits toxic fumes of SOx. See also SULFIDES and STRONTIUM COMPOUNDS.