Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Chromate shopping experience:

1. Compare - without doubt the biggest advantage that the Chromate offers shoppers today is the ability to compare thousands of Chromate at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.

2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about

3. Testimonials - don't know anybody that has bought a Chromate? Wrong! If the Chromate is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.

4. Questions - Got a question about Chromate then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....

5. Reputation - Never heard of the company selling Chromate? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Chromate and build up a picture of their reputation for sales, returns, customer service, delivery etc.

6. Returns - still worried that even after all of the above your Chromate wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.

7. Feedback - happy with your Chromate then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.

8. Security - check for the yellow padlock on the Chromate site before you buy, and the s after http:/ /i.e. https:// = a secure site

9. Contact - got a question about Chromate, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.

10. Payment - ready to pay for your Chromate, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.

Chromates and dichromates are salts of chromic acid and dichromic acid, respectively. Chromate salts contain the chromate ion, ChromiumOxygen42−, and have an intense yellow color. Dichromate salts contain the dichromate ion, Cr2O72−, and have an intense orange color.

Characteristics

• The chromium atoms are in oxidation state +6 in both, and the chromate and dichromate ions are fairly strong oxidizing agents. Chromium in the +6 (or VI) oxidation state is often referred to as hexavalent chromium.
• In an aqueous solution, chromate and dichromate anions are in a chemical equilibrium.

:2 CrO42− + 2 H3O+ ⇌ Cr2O72− + 3 H2O

This equilibrium can be pushed towards dichromate by lowering the pH (making the solution more acidic) or in the other direction towards chromate by raising the pH to base (chemistry). This is a classic example of Le Chatelier's principle at work.

• They are used in environmental analysis to measure chemical oxygen demand (COD).
• They are carcinogenic. All hexavalent chromium compounds are considered toxic and carcinogenic.
• When used as oxidizing agents or titrants in a redox chemical reaction, they will turn into trivalent chromium, Cr3+, which has a distinctively different blue-green color.
• The sodium (Na+), potassium (K+), and ammonium (NH4+) salts are water soluble granular solids and are the most commonly used chromate or dichromate chemical reagents. Most chromate and dichromate salts of heavy metals, lanthanides or alkaline earth metals are only very slightly soluble in water and are thus of much less usefulness.
• Chromate conversion coatings are applied to metals for corrosion protection, and to improve paint adhesion.
• The use of chromate compounds in manufactured goods is restricted in the EU (and by market commonality the rest of the world) by EU Parliament directive 2002/95/EC

Structures {|align="center" class="wikitable" style="width:500px"||||||||-|colspan="2"|the tetrahedral chromate ion, CrO42−||colspan="2"|the dichromate ion, Cr2O72−, consists of two corner-sharing tetrahedra|}

See also

• Potassium dichromate - K2Cr2O7

External links

• IARC Monograph "Chromium and Chromium compounds"
• National Pollutant Inventory - Chromium VI and compounds fact sheet

Chromates and dichromates are salts of chromic acid and dichromic acid, respectively. Chromate salts contain the chromate ion, ChromiumOxygen42−, and have an intense yellow color. Dichromate salts contain the dichromate ion, Cr2O72−, and have an intense orange color.

Characteristics

• The chromium atoms are in oxidation state +6 in both, and the chromate and dichromate ions are fairly strong oxidizing agents. Chromium in the +6 (or VI) oxidation state is often referred to as hexavalent chromium.
• In an aqueous solution, chromate and dichromate anions are in a chemical equilibrium.

:2 CrO42− + 2 H3O+ ⇌ Cr2O72− + 3 H2O

This equilibrium can be pushed towards dichromate by lowering the pH (making the solution more acidic) or in the other direction towards chromate by raising the pH to base (chemistry). This is a classic example of Le Chatelier's principle at work.

• They are used in environmental analysis to measure chemical oxygen demand (COD).
• They are carcinogenic. All hexavalent chromium compounds are considered toxic and carcinogenic.
• When used as oxidizing agents or titrants in a redox chemical reaction, they will turn into trivalent chromium, Cr3+, which has a distinctively different blue-green color.
• The sodium (Na+), potassium (K+), and ammonium (NH4+) salts are water soluble granular solids and are the most commonly used chromate or dichromate chemical reagents. Most chromate and dichromate salts of heavy metals, lanthanides or alkaline earth metals are only very slightly soluble in water and are thus of much less usefulness.
• Chromate conversion coatings are applied to metals for corrosion protection, and to improve paint adhesion.
• The use of chromate compounds in manufactured goods is restricted in the EU (and by market commonality the rest of the world) by EU Parliament directive 2002/95/EC

Structures {|align="center" class="wikitable" style="width:500px"||||||||-|colspan="2"|the tetrahedral chromate ion, CrO42−||colspan="2"|the dichromate ion, Cr2O72−, consists of two corner-sharing tetrahedra|}

See also

• Potassium dichromate - K2Cr2O7

External links

• IARC Monograph "Chromium and Chromium compounds"
• National Pollutant Inventory - Chromium VI and compounds fact sheet

Chromate - Wikipedia, the free encyclopedia
Chromates and dichromates are salts of chromic acid and dichromic acid, respectively. Chromate salts contain the chromate ion, Cr O 4 2−, and have an intense yellow color.

Chromate conversion coating - Wikipedia, the free encyclopedia
Chromate conversion coating is a type of conversion coating applied to passivate aluminium, zinc, cadmium, copper, silver, magnesium, tin and their alloys to slow corrosion.

Chemical Safety Data: Potassium chromate
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THE SYSTEMATIC SOLUTION TO MAINTENANCE PROBLEMS!
If for any reason you are not completely satisfied, I want to hear about it! Please CLICK HERE to inform me directly. My name is Paul Davis and I am the president of Chromate ...

Definition: chromate from Online Medical Dictionary
The Online Medical Dictionary is a searchable dictionary of definitions from medicine, science and technology.

Definition: chrome yellow from Online Medical Dictionary
lead chromate -->