What Chemical Causes Wood to Change Color in Sunlight?

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In summary, "Help identify this chemical" is a service that helps individuals determine the identity of a chemical for safety or research purposes. Accurate identification requires detailed information about the substance, including its physical appearance, chemical reactions and properties, and safety information. Attempting to identify a chemical without proper knowledge or training can be extremely hazardous and it is recommended to consult a trained professional or reputable resources. If a chemical cannot be identified, precautions should be taken and further information should be obtained from a trained professional or laboratory testing.
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TalonD
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Just wondering if anyone might have a guess as to what chemical this could be based on it's apperance when it is applied to wood. I found this picture on a woodworking site. This is some kind of chemical stain for wood. When first applied to wood it is a lemon yellow color but after a few minutes of UV exposure in sunlight it turns a brown / tan color.
 

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no opinions eh? I'm thinking possibly ferric chloride or that in a mix of other things
 

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The purpose of "Help identify this chemical" is to assist individuals in determining the identity of a particular chemical or substance. This can be helpful for various reasons, such as safety concerns or research purposes.

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In order to accurately identify a chemical, it is important to have as much information as possible about the substance. This can include the chemical's physical appearance, any known chemical reactions or properties, and any safety information.

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