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Chromium sulfate

 

 
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Chromium sulfate
 
 
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Chromium(III) sulfate usually refers to the inorganic compound
Inorganic compound

Traditionally, inorganic compounds are considered to be of a mineral, not biological, origin. Complementarily, most organic compounds are traditionally viewed as being of biological origin....
 with the formula
Chemical formula

A chemical formula is a way of expressing information about the atoms that constitute a particular chemical compound, and how the relationship between those atoms changes in chemical reactions....
 Cr2(SO4)3(H2O)12. This purple solid consists of the hydrated
Water of crystallization

Water of crystallization is water that occurs in crystals but is not covalent bond to a host molecule or ion. The term is archaic and predates modern structural inorganic chemistry, coming from an era when the relationships between stoichiometry and structure were poorly understood....
 sulfate salt of [Cr(H2O)6]3+ ion. It is widely used in the tanning of leather.

c chromium sulfate is produced from chromate
Chromate

Chromates and dichromates are salts of chromic acid and dichromic acid, respectively. Chromate salts contain the chromate anion, ChromiumOxygen42-, and have an intense yellow color....
 salts by reduction with sulfur dioxide
Sulfur dioxide

Sulfur dioxide is the chemical compound with the formula SO2. It is produced by volcanoes and in various industrial processes. Since coal and petroleum often contain sulfur compounds, their combustion generates sulfur dioxide....
, although other methods exist.






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Chromium(III) sulfate usually refers to the inorganic compound
Inorganic compound

Traditionally, inorganic compounds are considered to be of a mineral, not biological, origin. Complementarily, most organic compounds are traditionally viewed as being of biological origin....
 with the formula
Chemical formula

A chemical formula is a way of expressing information about the atoms that constitute a particular chemical compound, and how the relationship between those atoms changes in chemical reactions....
 Cr2(SO4)3(H2O)12. This purple solid consists of the hydrated
Water of crystallization

Water of crystallization is water that occurs in crystals but is not covalent bond to a host molecule or ion. The term is archaic and predates modern structural inorganic chemistry, coming from an era when the relationships between stoichiometry and structure were poorly understood....
 sulfate salt of [Cr(H2O)6]3+ ion. It is widely used in the tanning of leather.

Production and properties

Basic chromium sulfate is produced from chromate
Chromate

Chromates and dichromates are salts of chromic acid and dichromic acid, respectively. Chromate salts contain the chromate anion, ChromiumOxygen42-, and have an intense yellow color....
 salts by reduction with sulfur dioxide
Sulfur dioxide

Sulfur dioxide is the chemical compound with the formula SO2. It is produced by volcanoes and in various industrial processes. Since coal and petroleum often contain sulfur compounds, their combustion generates sulfur dioxide....
, although other methods exist. Heating the violet solid leads to partial dehydration to give a hydrated green salt (CAS#10031-37-5) and eventually the anhydrous derivative (CAS#10101-53-8).

Hazards

It is a source of effluent pollution
Pollution

Pollution is the introduction of contaminants into an environment that causes instability, disorder, harm or discomfort to the ecosystem i.e. physical systems or living organisms ....
 in the Ganges River
Ganges River

The 'Ganges' is one of the major rivers of the Indian subcontinent, flowing east through the Gangetic Plain of northern India into Bangladesh....
 in Kanpur, India.