|Jmol-3D images||Image 1|
|Molar mass||194.19 g mol−1|
|Melting point||968 °C (1,774 °F; 1,241 K)|
|Boiling point||1,000 °C (1,830 °F; 1,270 K)|
|Solubility in water||62.9 g/100 mL (20 °C)
75.1 g/100 mL (80 °C)
79.2 g/100 mL (100 °C)
|Solubility||insoluble in alcohol|
|Refractive index (nD)||1.74|
|MSDS||Chemical Safety Data|
|EU classification||Carc. Cat. 2
Muta. Cat. 2
Dangerous for the environment (N)
|R-phrases||R49, R46, R36/37/38, R43, R50/53|
|S-phrases||S53, S45, S60, S61|
|Other anions||Potassium dichromate
|Other cations||Sodium chromate
|Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)|
|(what is: / ?)|
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.
When reacted with lead(II) nitrate, it creates an orange-yellow precipitate, lead(II) chromate. All ions hydrolyze in solution.
Tarapacaite is the natural, mineral form of potassium chromate. It occurs very rarely and until now is known from only few localities on Atacama desert.
Potassium chromate is very toxic and may be fatal 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 if in the presence of H+ to produce the dichromate ion. It may react rapidly, or violently. It is also possible that it may react explosively with other reducing agents and flammable objects.
- Potassium chromate information URL last accessed 15 March 2007
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