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Potassium Chromate
Potassium Chromate (Product Code: SCI-609/265) is an analytical reagent grade potassium chromate (K2CrO4) used as the indicator in Mohr's titration of chloride and as a precipitating reagent for lead, barium and silver ions in college and senior school laboratories. The yellow salt comes in a 100 g pack with an MSDS, and as a chromium(VI) compound it needs careful handling. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Chemical | Potassium chromate, K2CrO4 |
| Grade | Analytical reagent |
| Pack quantity | 100 g |
| MSDS | Supplied with the pack |
| Shelf life | Shelf life depends on the chemical, its grade and storage conditions; ask us for the expiry date of the batch you are quoted. |
| Product code | SCI-609/265 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is Potassium Chromate Used For?
In Mohr's method, a few drops of potassium chromate solution are added to a neutral chloride sample, which is then titrated with standard silver nitrate. White silver chloride precipitates first; once all the chloride is used up, the next drop of silver nitrate forms red-brown silver chromate, marking the end point. The titration is used for chloride in water, salt and food samples in teaching and testing laboratories.
As a precipitating reagent, chromate gives yellow lead chromate, yellow barium chromate and red-brown silver chromate, useful confirmatory tests in salt analysis. Adding acid turns the yellow solution orange as dichromate forms, a simple demonstration of a shifting equilibrium. Chromium(VI) compounds are toxic, carcinogenic and skin sensitisers, so use gloves and goggles, avoid dust and collect waste for hazardous disposal.
Supplier
Schools and colleges setting up volumetric analysis often buy Potassium Chromate together with silver nitrate and burettes, and ScienceLab, the trading name of Jain Scientific Equipments Private Limited, Ambala, supplies all three. Laboratory dealers can also source the indicator for resale to institutions. For company information, visit the ScienceLab profile.
Related Laboratory Equipment
Items used with potassium chromate in Mohr titrations and chromate tests:
- Silver Nitrate — the titrant in Mohr's chloride titration.
- Sodium Chloride — a primary standard for checking the silver nitrate.
- Burette — delivers the titrant drop by drop.
- Potassium Dichromate — the orange partner in the chromate–dichromate equilibrium.
- Lead Nitrate — gives yellow lead chromate with chromate ions.
The complete range is in Laboratory Equipment.
Frequently Asked Questions
Why is Potassium Chromate used as an indicator in Mohr's titration?
Potassium Chromate is used because silver chromate is more soluble than silver chloride under titration conditions, so it forms only after all chloride has precipitated. The first permanent red-brown tint of silver chromate therefore signals the end point.
What conditions does Potassium Chromate need in Mohr's method?
Potassium Chromate works as a Mohr indicator only in neutral or slightly alkaline solution. In acid, chromate converts to dichromate and the end point is lost, while strongly alkaline solutions precipitate silver hydroxide, so adjust samples before titrating.
What pack does Potassium Chromate SCI-609/265 come in?
Potassium Chromate SCI-609/265 is a 100 g pack of analytical reagent grade salt with an MSDS. Indicator solutions need only small amounts of the salt, so one pack supports a large number of titrations.
Is Potassium Chromate hazardous?
Yes. Potassium Chromate contains chromium(VI), which is toxic, carcinogenic and can cause skin allergy. Use it only with gloves, goggles and supervision, avoid raising dust, and dispose of residues as hazardous waste as the MSDS directs.
How should Potassium Chromate be stored?
Store Potassium Chromate in a closed, labelled container in a locked chemical cabinet, away from reducing agents and combustible materials. Shelf life depends on the chemical, its grade and storage conditions; ask us for the expiry date of the batch you are quoted.
What is the difference between Potassium Chromate and potassium dichromate?
Potassium Chromate contains yellow chromate ions and is used mainly as an indicator and precipitant, whereas potassium dichromate contains orange dichromate ions and serves as an oxidising agent in titrations. Acid converts chromate into dichromate.
Request a Quote
Include Potassium Chromate in a titration-set quotation by sending your list through the contact page, or add it to the enquiry cart with silver nitrate, sodium chloride and burettes.
Last updated: 24 September 2026
