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Strontium sulfate

Basic information Physical Properties Occurrence and Uses Production Safety Related Supplier

Strontium sulfate Basic information

Product Name:
Strontium sulfate
CAS:
7759-02-6
MF:
O4SSr
MW:
183.68
EINECS:
231-850-2
Mol File:
7759-02-6.mol
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Strontium sulfate Chemical Properties

Melting point:
1600°C
Density 
3.96 g/mL at 25 °C(lit.)
RTECS 
WT1210000
solubility 
aqueous acid: slightly soluble(lit.)
form 
powder
color 
White
Water Solubility 
Soluble in dilute hydrochloric acid and nitric acid . Slightly soluble in water < 0.01 g/L . Insoluble in ethanol and alkalis.
Merck 
14,8848
Solubility Product Constant (Ksp)
pKsp: 6.46
CAS DataBase Reference
7759-02-6(CAS DataBase Reference)
EPA Substance Registry System
Sulfuric acid, strontium salt (1:1) (7759-02-6)
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Safety Information

Safety Statements 
22-24/25
WGK Germany 
3
TSCA 
Yes
HS Code 
28332990

MSDS

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Strontium sulfate Usage And Synthesis

Physical Properties

White crystalline powder; orthorhombic crystals; refractive index 1.622; hardness 3.3 Mohs; density 3.96 g/cm3; melts at 1,605°C; very slightly soluble in water 0.014 g/100mL at 30°C; soluble in alkali chloride solutions; slightly soluble in alcohol; insoluble in alkalis.

Occurrence and Uses

Strontium sulfate occurs in nature as mineral celestite, which is the principal ore of strontium. The sulfate is the starting material for producing strontium metal and practically all its salts. The sulfate also is used in pyrotechnics and in ceramics.

Production

Strontium sulfate occurring in nature as celestite is mined from its natural deposits. Also, the sulfate can be made by reacting strontium oxide, hydroxide, or carbonate with dilute hydrochloric acid:
SrO + H2SO4 → SrSO4 + H2O
SrCO3 + H2SO4 → SrSO4 + CO2 + H2O

Description

Strontium sulfate has the molecular formula of SrSO4 and the molecular weight of 183.6842 g/mol. It can be prepared by the reaction of sodium sulfate and strontium chloride:
Na2SO4+SrCl2?SrSO4+2NaCl
Strontium sulfate occurs in nature as “celestite” and is mined from its natural deposits. Also, the sulfate can be made by reacting strontium oxide, hydroxide, or carbonate with dilute hydrochloric acid:
SrO+H2SO4?SrSO4+H2O
SrCO3+H2SO4?SrSO4+CO2+H2O
No hydrates are known.Its hardness is 3.3 Mohs. It melts at 1608°C. Its solubility in water is 0.015 g/100 ml at 25°C and 0.014 g at 35°C. It is insoluble in ethanol and acetone, but slightly soluble in acids and alkalis. It is soluble in alkali chloride solutions. The heat of formation, △Hf, is –1453 kJ/mol with an entropy value, S0, of 117.0 J/mol K. Its Mohs Hardness is 3.0–3.5. A water solution has a pH of 7.5. Its specific gravity ranges from 3.8 to 4.0 g/cm3.Pure strontium sulfate precipitate consists of single crystals, about some tens of microns long, with distinctly visible growth steps. Crystals grown with polyvinyl sulfonate in stirred solutions show a striking change of habit: they are sponge-like structures, composed of minute crystallites, of size in the nanometer range. Crystallized strontium sulfate is utilized by a small group of protozoa as a main constituent of their skeleton. It is sometimes used to impart iridescence to glass and pottery glazes or used as a fining agent in crystal glass.
There is very little demand for this salt in industry. It is available in limited quantities commercially.

Chemical Properties

Milky white powder

Uses

Widely applied in the manufacturing of Barium Salts, pigments, special glass, printing inks, paints, filler for textiles, linoleum, paper, rubber, base for color lakes, as pigment and white lead substitutes.

Uses

In ceramics, pyrotechnics.

Definition

strontium sulphate: A white solid,SrSO4; r.d. 3.96; m.p. 1605°C. It canbe made by dissolving strontiumoxide, hydroxide, or carbonate in sulphuricacid. It is used as a pigment inpaints and ceramic glazes and to providea red colour in fireworks.

Strontium sulfate Preparation Products And Raw materials

Raw materials

Preparation Products

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Strontium sulfateSupplierMore

J & K SCIENTIFIC LTD.
Tel:
010-82848833- ;010-82848833-
Email:
jkinfo@jkchemical.com;market6@jkchemical.com
Alfa Aesar
Tel:
400-610-6006; 021-67582000
Email:
saleschina@alfa-asia.com
BeiJing Hwrk Chemicals Limted
Tel:
21-51691807-
Email:
peter.shi@hwrkchemical.com;
Energy Chemical
Tel:
021-58432009 / 400-005-6266
Email:
info@energy-chemical.com
Adamas Reagent, Ltd.
Tel:
400-600-9262
Email:
bxy@titansci.com
Basic information Physical Properties Occurrence and Uses Production Safety Related Supplier