Gold Member Since 2015
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Zibo Qingxin Chemicals Co., Ltd.

Potassium Dichromate, Sodium Dichromate, Inorganic Salt manufacturer / supplier in China, offering Hot Sale High Quality Photography and Leather Use Potassium Dichromate, BV Certification Main Product Caustic Soda 99% Flake, Directly Factory Price Pentaerythritol 98min and so on.

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Hot Sale High Quality Photography and Leather Use Potassium Dichromate

Purchase Qty.:
(Tons)
20-39 40-59 60+
FOB Unit Price: US $3,280 US $3,250 US $3,200
Purchase Qty. (Tons) FOB Unit Price
20-39 US $3,280
40-59 US $3,250
60+ US $3,200
Get Latest Price
Production Capacity: 5000mt Per Month
Transport Package: 25kg Per Bag, 25mt in a 20′ Container
Payment Terms: L/C, T/T

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Basic Info
  • Model NO.: potassium dichromate
  • Grade Standard: Industrial Grade
  • Trademark: QX
  • Appearance: Crystal
  • Color: Red
  • Origin: Shandong, China
Product Description
Hot Sale High Quality Photography and Leather use Potassium Dichromate

Properties
Molecular formulaK2Cr2O7
Molar mass294.185 g/mol
Appearancered-orange crystalline solid
Odorodorless
Density2.676 g/cm3, solid
Melting point398 °C
Boiling point500 °C decomp.
Solubility inwater4.9 g/100 mL (0 °C)
102 g/100 mL (100 °C)
Solubilityinsoluble in alcohol
Refractive index (nD)1.738
 
ItemExcellence gradeFirst gradeStandard grade 
K2Cr2o7 content99.899.599
Chlorides (Cl)%0.0500.0500.080 
Insoluble  %0.0200.0200.050
Sulfates ( SO4-2) %0.0200.050-
Na+ %0.010.01-
Moisture %0.0300.030-
Uses
Cleaning
Potassium dichromate may be used to prepare "chromic acid", which can be used for cleaning glassware and etching materials.
Construction
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
Leather
It is used to tan leather which is used for footwear.
Photography
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.
Silver test
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. 
Wood treatment
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.
 
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