Hot Sale High Quality Photography and Leather Use Potassium Dichromate
Basic Info
Model No.: potassium dichromate
Product Description
Model NO.: potassium dichromate Grade Standard: Industrial Grade Trademark: QX Appearance: Crystal Color: Red Origin: Shandong, China Hot Sale High Quality Photography and Leather use Potassium Dichromate
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.
Contact us if you need more details on Potassium Dichromate. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Sodium Dichromate、Inorganic Salt. If these products fail to match your need, please contact us and we would like to provide relevant information.
Properties | |
Molecular formula | K2Cr2O7 |
Molar mass | 294.185 g/mol |
Appearance | red-orange crystalline solid |
Odor | odorless |
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 |
K2Cr2o7 content | 99.8 | 99.5 | 99 |
Chlorides (Cl)% | 0.050 | 0.050 | 0.080 |
Insoluble % | 0.020 | 0.020 | 0.050 |
Sulfates ( SO4-2) % | 0.020 | 0.050 | - |
Na+ % | 0.01 | 0.01 | - |
Moisture % | 0.030 | 0.030 | - |
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.
Contact us if you need more details on Potassium Dichromate. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Sodium Dichromate、Inorganic Salt. If these products fail to match your need, please contact us and we would like to provide relevant information.
Product Categories : Industrial Pigments
Other Products
Hot Products
High Quality Calcium Hydroxide/Hydrated Lime Sale100mesh to 800 Mesh Zinc Powder MetalWide - Mouthed Reagent BottleCondenser Tube17%Non-Ferric Aluminium SulphateBV Certification Main Product Caustic Soda 99% FlakeCompetitve Price for Phosphoric Acid 85% Food GradePetri Culture Dish Made of Glass (1177)Beaker Low Form with Spout (1101)Glass Test Tube with Rim (1232)Fully Refined Paraffin Wax 58/60 for Candle MakingIndustrial Grade White Crystalline Powder Melamine 99.8%Volumetric Flasks Provide The Highest AccuracyAgricultural Monoammonium Phosphate Granular Phosphate Fertilizer Map 12-61-0Technical Grade/Industrial Grade Caustic Soda Flake with Good Price, 25kg Per BagGood Price Good Quality Chemical Reagent