Potassium chromate

Chembox new
ImageFile = Potassium-chromate-sample.jpg
IUPACName = Potassium Chromate
Section1 = Chembox Identifiers
CASNo = 7789-00-6

Section2 = Chembox Properties
K = 2 | Cr = 1 | O = 4
Appearance = Yellow odorless powder
Density = 2.7320 g·cm⁻³
Solubility = Soluble
MeltingPtC = 975
BoilingPt = N/A
Section7 = Chembox Hazards
ExternalMSDS = [http://ptcl.chem.ox.ac.uk/~hmc/hsci/chemicals/potassium_chromate.html Chemical Safety Data]
NFPA-H = 3| NFPA-F = 0
NFPA-R = 3 :"You may be looking for potassium dichromate"Potassium chromate (K₂CrO₄) is a yellow chemical indicator used for identifying concentrations of chloride ions in a salt solution with silver nitrate (AgNO₃). It is a class two carcinogen and can cause cancer on inhalation. [ [http://www.jtbaker.com/msds/englishhtml/p5642.htm Potassium chromate information] URL last accessed 15 March 2007]

General information

Physical properties

Potassium Chromate is a lemon yellow compound that is in the form of a crystalline solid, and it is very stable.Fact|date=March 2008

Reactions

When reacted with Lead(II) Nitrate, it creates an orange-yellow precipitate, Lead(II) Chromate, and Potassium Nitrate.

Occurrence

Tarapacaite is the natural, mineral form of potassium chromate. It occurs very rarely and till now is known from only few localities on Atacama desert.

Dangers/Hazards

Potassium Chromate is very toxic and may be if swallowed. It may also act as a carcinogen, and can create reproductive defects if inhaled or swallowed. It also is a strong oxidizing agent. It may react rapidly, or violently. It is also possible that it may react explosively with other reducing agents and flammable objects.

References