Copper Sulfate, Cupric Sulphate

Copper sulphate pentahydrate is a fungicide and pesticide. However, some fungi are capable of adapting to elevated levels of copper ions. Mixed with lime it is called Bordeaux mixture and used to control fungus on grapes, melons, and other berries. Another application is Cheshunt compound a mixture of copper sulfate and ammonium carbonate used in horticulture to prevent damping off in seedlings.

A dilute solution of copper sulphate is used to treat aquarium fish for parasitic infections, and is also used to remove snails from aquariums. Copper ions are highly toxic to fish, so care must be taken with the dosage. Most species of algae can be controlled with very low concentrations of copper sulfate. Copper sulphate inhibits growth of bacteria such as Escherichia coli. It is also used as a wood preservative apart from its use in electroplating. It can also be used as a mordant in vegetable dyeing.

Copper Sulphate Pentahydrate BP Grade Ph Eur

CuSO4-5H2O — 249.7 — 7758-99-8

DEFINITION
Content: 99.0 per cent to 101.0 per cent.

CHARACTERS
Appearance: Blue, crystalline powder or transparent, blue crystals.
Solubility: Freely soluble in water, soluble in methanol, practically insoluble in ethanol (96 per cent).

IDENTIFICATION
A. Add several drops of dilute ammonia to 1 ml of solution S (see Tests). A blue precipitate is formed. On further addition of dilute ammonia the precipitate dissolves and a dark blue colour is produced.
B. Loss on drying (see Tests).
C. Dilute 1 ml of solution S to 5 ml with water. The solution gives reaction of sulphates.

TESTS
Solution S: Dissolve 5 g in water and dilute to 100 ml with the same solvent.
Appearance of solution: Solution S is clear.
Chlorides: Maximum 100 ppm.
Iron: Maximum 1.00 × 10² ppm.
Atomic absorption spectrometry: To meet the requirement.
Lead: Maximum 50.0 ppm.
Loss on drying: 35.0 per cent to 36.5 per cent, determined on 0.500 g by drying in an oven at 250 ± 10 °C.

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Cupric Sulfate Cupric Sulfate USP Grade

CuSO45H2O — 249.69
Sulfuric acid, copper(2+) salt (1:1), pentahydrate.
Copper(2+) sulfate (1:1) pentahydrate [7758-99-8].
Anhydrous 159.61 [7758-98-7].
Cupric Sulfate, dried at 250 to constant weight, contains not less than 98.5 percent and not more than 100.5 percent of CuSO4.

Identification: A solution (1 in 10) responds to the tests for Copper and for Sulfate.
Loss on drying: Dry it at 250 to constant weight: it loses between 33.0% and 36.5% of its weight.
Limit of sodium: The limit is 0.02%.
Limit of potassium: The limit is 0.01%.
Limit of calcium: The limit is 0.005%.
Limit of iron: The limit is 0.003%.
Limit of nickel: The limit is 0.005%.

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Copper Sulfate Cupric Sulfate FCC Food grade

CuSO4 Formula wt, anhydrous 159.6
CuSO4·5H2O Formula wt, pentahydrate 249.68
INS: 519 CAS: anydrous [7758-98-7]
CAS: pentahydrate [7758-99-8]

DESCRIPTION
Copper Sulfate occurs as blue crystals, crystalline granules, or powder. It effloresces slowly in dry air and is freely soluble in water, soluble in glycerin, and slightly soluble in alcohol.
Function: Nutrient.

REQUIREMENTS
Identification: A 1:20 solution gives positive tests for Copper and for Sulfate.
Assay: Not less than 98.0% and not more than 102.0% of CuSO4·5H2O.
Iron: Not more than 0.01%.
Lead: Not more than 4 mg/kg.
Substances Not Precipitated by Hydrogen Sulfide: Not more than 0.3%.

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Cupric Sulfate Pentahydrate ACS AR Analytical Reagent Grade

Copper(II) Sulfate Pentahydrate
CuSO4 · 5H2O Formula Wt 249.68
CAS Number 7758–99–8

REQUIREMENTS
Assay: 98.0–102.0% as CuSO4 · 5H2O

MAXIMUM ALLOWABLE
Insoluble matter: 0.005%
Chloride (Cl): 0.001%
Nitrogen compounds (as N): 0.002%
Calcium (Ca): 0.005%
Iron (Fe): 0.003%
Nickel (Ni): 0.005%
Potassium (K): 0.01%
Sodium (Na): 0.02%

For Original Monographs of IP Indian Pharmacopoeia BP British Pharmacopoeia USP US Pharmacopoeia FCC Food Grade product, please check with the respective web-pages or books.