Potassium dichromate, also called potassium dichromate(VI), is a brightly colored and toxic not natural chemical with many industrial applications.

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Formula and also structure: The chemical formula for potassium dichromate is K2Cr2O7 and its molar mass is 294.185 g/mol. The is one ionic compound through two potassium ion (K+) and also the negatively fee dichromate ion (Cr2O7-), in which 2 hexavalent chromium atom (with oxidation state +6) are each attached to 3 oxygen atoms and also a bridging oxygen atom.


Occurrence: Potassium dichromate occurs naturally in mineral type as lopezite, a really rare mineral.

Preparation: Potassium dichromate is created industrially by reacting potassium chloride (KCl) with sodium dichromate (Na2Cr2O7). It is likewise obtained indigenous its related compound, potassium chromate (K2CrO4), i m sorry reacts through acids to offer the dichromate salt.

Na2Cr2O7 + 2 KCl → K2Cr2O7 + 2 NaCl

Physical properties : it is a bright red-orange crystalline solid with a density of 2.676 g/mL, melting allude of 398 °C and boiling suggest of 500 °C, when it decomposes. It is odorless and also highly water soluble.

Chemical properties: Potassium dichromate easily ionizes in water to give chromate (CrO42-) and dichromate (Cr2O72-) ion in equilibrium. It is a center oxidizing agent widely offered in essential chemistry. The is a secure solid under regular conditions, yet it decomposes upon heating to give potassium chromate (K2CrO4) and chromic anhydride (CrO3) with the development of oxygen.

4K2Cr2O7 → 4K2CrO4 + 2Cr2O3 + 3O2

It reaction reversibly v bases such as potash (K2CO3) to give a yellow equipment of chromate salts.

K2Cr2O7 + K2CO3 → 2 K2CrO4 + CO2

It reacts v cold dilute acids to give chromic anhydride, and with focused acids, it offers chromate salts and also oxygen.

Uses: Potassium dichromate is provided for preparing strong cleaning solutions for glassware and also for etching materials. It likewise has provides in leather tanning, photographic processing, cement, and also wood staining. The is used as one oxidizing certified dealer in numerous applications, and is likewise used to prepare various assets such together waxes, paints, glues, etc.

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Health effects/safety hazards: together a hexavalent chromium compound, potassium dichromate is carcinogenic and also highly toxic. That is also really corrosive and skin/eye contact can cause severe irritation and also burning sensation, and even bring about blindness. The is also known to influence reproductive health and acts as a mutagenic certified dealer (affects the genetic material and also harms unborn children).