Chemical Properties of Potassium bichromate

The Potassium bichromate , with the CAS register number 7778-50-9, It is a kind of orange red monoclinic system or triclinic system crystalline, and it is slightly soluble in water and easily soluble in hot water while insoluble in ethyl alcohol .
As for its usage, it is widely used in many field. First, it could be used as the chrome alum, chromium oxide green, chrome yellow pigment. Then, it could be mixed with the  feldspar powder and quartz sand to calcine and then comes enamel powder; It is used in modulating the match head to take the function of anti-moisture; It could be applied to as the tanning extracts and mordant in dyeing and printing; It could be used in making spice to be as oxidant. Besides, it is applied in welding rod, printing ink,passivation of metals and also as the oxidant and catalyst for organic synthesis and the raw material of the medicines.

It is a kind of very harmful chemical and you need to very cautious while dealing with it. Because it is dangerous for the environment, and it is toxic and oxidizing. Besides, it may cause cancer, heritable genetic damage, and impair fertility and it may cause harm to the unborn child, and etc. So take these instructions while using it. Wash hands, face, forearms and neck when exiting restricted areas; Wash hands before eating and do not eat, drink, or smoke in workplace; Wear special protective equipment for maintenance break-in or where exposures may exceed established exposure levels. Shower, dispose of outer clothing, change to clean garments at the end of the day; Protect against physical damage; Remove and dispose of any spilled dichromates; do not return to original containers;
When it comes to its storing, containers of this material may be hazardous when empty since they retain product residues (dust, solids); observe all warnings and precautions listed for the product; Store in a dry location separate from combustible, organic or other readily oxidizable materials. Avoid storage on wood floors.



Name:Potassium dichromate

EINECS:231-906-6

Molecular Formula:K2Cr2O7

CAS Registry Number:7778-50-9

Synonyms:Potassium dichromate standard solution; Potassium bichromate; Red potassium chromate

Appearance:almost colorless liquid.

Molecular Weight:294.18

Density:2.676

Boiling Point:500°C

Melting Point:398°C

Flash Point:50?°F

Storage Temperature:Store at RT.

Solubility:125 g/L (20 oC) in water
Chemical Properties:Orange solid
General Description:Orange red crystals. Denser than water and soluble in water. No distinctive odor. May severely irritate the eyes and respiratory tract. Avoid contact with organic materials. Noncombustible. Used in pyrotehnic displays with tungsten and iron.
Air & Water Reactions:Soluble in water.
Reactivity Profile:Potassium or sodium dichromate reacts explosively with hydrazine. A drop of anhydrous hydroxylamine on powdered potassium dichromate produces a violent explosion.
Health Hazard: Highly corrosive to skin and mucous membranes. If ingested, causes violent gastroenteritis, peripheral vascular collapse, vertigo, muscle cramps, coma, and (later) toxic nephritis with glycosuria. Allergic reactions may also occur.

Fire Hazard: Behavior in Fire: May decompose, generating oxygen. Supports the combustion of other materials.