Hot Sale High Quality Photography and Leather Use Potassium Dichromate
|20-39 40-59 60+|
|FOB Unit Price:||US $3,280 US $3,250 US $3,200|
|Purchase Qty. (Tons)||FOB Unit Price|
|Production Capacity:||5000mt Per Month|
|Transport Package:||25kg Per Bag, 25mt in a 20′ Container|
|Payment Terms:||L/C, T/T|
- Model NO.: potassium dichromate
- Grade Standard: Industrial Grade
- Trademark: QX
- Appearance: Crystal
- Color: Red
- Origin: Shandong, China
|Molar mass||294.185 g/mol|
|Appearance||red-orange crystalline solid|
|Density||2.676 g/cm3, solid|
|Melting point||398 °C|
|Boiling point||500 °C decomp.|
|Solubility inwater||4.9 g/100 mL (0 °C)|
102 g/100 mL (100 °C)
|Solubility||insoluble in alcohol|
|Refractive index (nD)||1.738|
|Item||Excellence grade||First grade||Standard grade|
|Sulfates ( SO4-2) %||0.020||0.050||-|
Potassium dichromate may be used to prepare "chromic acid", which can be used for cleaning glassware and etching materials.
It is used as an ingredient in cement in which it retards the setting of the mixture and improves its density and texture. This usage commonly causes contact dermatitis in construction workers
It is used to tan leather which is used for footwear.
Potassium dichromate has important uses in photography and in photographic screen printing, where it is used as an oxidizing agent together with a strong mineral acid.
When dissolved in an approximately 35% nitric acid solution it is called Schwerter's solution and is used to test for the presence of various metals, notably for determination of silver purity. Pure silver will turn the solution bright red, sterling silver will turn it dark red, low grade coin silver(0.800 fine) will turn brown (largely due to the presence of copper which turns the solution brown) and even green for 0.500 silver.
Sulfur dioxide test
Potassium dichromate paper can be used to test for sulfur dioxide, as it turns distinctively from orange to green.
Potassium dichromate is used to stain certain types of wood by darkening the tannins in the wood. It produces deep, rich browns that cannot be achieved with modern color dyes. It is a particularly effective treatment on mahogany.