Potassium Bichromate/Dichromate

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Are potassium bichromate and dichromate the same chemical?
Hello All

I have a reference in a 1930s journal to potassium bichromate. Is this the same as potassium dichromate K2Cr2O7 ? ie dichromate is the modern terminaology to use.

Searching on the www almost always finds the dichromate when I search for the bichromate, but maybe this is just the search engine finding a best match?

best regards ... Stef
 
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As far as I am aware bichromate and dichromate are synonyms.
 

What is potassium dichromate and what are its common uses?

Potassium dichromate, also known as potassium bichromate, is a chemical compound with the formula K₂Cr₂O₇. It is a highly oxidizing, bright orange crystalline substance. Common uses of potassium dichromate include its role as an oxidizing agent in various laboratory and industrial processes, in the manufacture of pigments, and as a mordant in dyeing and printing textiles. It is also used in the tanning of leather and, historically, in photography for bleaching and toning.

Is potassium dichromate hazardous?

Yes, potassium dichromate is considered highly hazardous due to its strong oxidizing properties. It is toxic, carcinogenic, and can cause severe harm to human health if inhaled, ingested, or if it comes into contact with skin. Exposure can lead to respiratory issues, skin irritation, and in severe cases, can cause organ damage or cancer. Proper handling, storage, and disposal according to safety guidelines are crucial to minimize health risks.

How should potassium dichromate be handled and stored?

Potassium dichromate should be handled with extreme care. It requires the use of personal protective equipment such as gloves, safety goggles, and protective clothing. Always work in a well-ventilated area or under a fume hood. Storage should be in a cool, dry place away from any incompatible substances like organic materials, and strong reducers. Containers should be tightly closed and clearly labeled to avoid accidental misuse.

Can potassium dichromate be disposed of down the drain?

No, potassium dichromate should not be disposed of down the drain due to its toxic and environmentally hazardous nature. It must be disposed of as hazardous waste according to local, state, and federal regulations. Typically, this involves handing it over to a certified hazardous waste disposal service that can manage and treat the waste safely.

What should be done in case of exposure to potassium dichromate?

In case of exposure to potassium dichromate, immediate actions should be taken to mitigate the effects. If it contacts the skin, wash the affected area thoroughly with soap and water. In case of eye contact, rinse the eyes with plenty of water for at least 15 minutes and seek medical attention. If inhaled, move the person to fresh air immediately and seek medical help. If ingested, do not induce vomiting and seek urgent medical care. Always report any exposure incident to the appropriate health and safety authorities.

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