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Copper Oxychloride |
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Copper oxychloride is the common name for
basic cupric chloride having the chemical formula 3Cu(OH) 2. Cucl2.
The main application of this chemical is as a protective fungicide
in many crops. Generally the technical grade is produced and then
it is formulated to suit for water based and oil based applications
separately. Since this product is used for foliar application its
suspendibility in water or oil is more important. Hence technical
grade is manufactured under strict quality control to get the desired
product .the specifications of the technical grade are as follows. |
| Moisture |
: |
1%(Max) |
| Copper |
: |
57%(Min) |
| Total Chlorine |
: |
15.5%(Min) |
| Acidity as H2SO4 |
: |
0.05%(Max) |
| Or, Alkalinity as Na2CO3 |
: |
0.5%(Max) |
| Soluble copper salts |
: |
30ppm(Max) |
| Lead |
: |
0.05%(Max) |
| Arsenics |
: |
0.05%(Max) |
| For tea, a low ph COC is used where as higher ph values
are preferred for other crops though COC was initially developed as
a substitute for Bordeaux mixture, later farmers started using this
for soil drenching application also. |
| Uses
of Copper oxychloride |
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As a fungicide |
|
As a starting material for making Cu (OH) 2; Copper
Hydroxide |
| It is manufactured by the oxidation of Nacl –
Cucl solution in presence of Copper metal. |
| Packing |
10kg, 13kg bags and ½ kg packets |
|
Copper hydroxide |
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Copper hydroxide is the hydrated cupric
oxide. Its chemical formula is Cu (OH) 2.It is a very weak base. If
heated even gently under water copper hydroxide decomposes into black
cupric oxide. Copper hydroxide is a bluish fine powder having the
molecular weight 97.56. The copper contents varies from 57 to 65%
depending on the method of manufacture. However for the fungicidal
applications the copper content is reduced to 50% in the formulation
step. |
| Commercial Copper hydroxide is manufactured from high
quality copper scrap or copper salts in presence of certain stabilizers.
The material for fungicide is tailor made in crystal size and shape.
Cu (OH) 2 for chemical industry is characterized by very low impurities
of base metals and chlorine. |
| The technical specifications of the copper hydroxide
and for fungicidal property are as follows. |
| Molecular formula |
: |
Cu(OH)2 |
| Molecular weight |
: |
97.56 |
| Suspendibility |
: |
70%(Min) |
| Moisture |
: |
2.5%(Min) |
| Wetting temperature |
: |
<60 seconds |
| Fineness |
: |
44 microns |
| Advantage
of Copper hydroxide |
|
The main use of Cu(OH )2 is as a protective
fungicide as a substitute for Bordeaux Mixture. |
|
It is also used in chemical industries as a valuable
starting material for other copper based compounds. |
| Packing |
1 kg, 1/2kg and 100gm packets |
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