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<p>[QUOTE=&quot;alurid, post: 3992150, member: 81991&quot;]Yes, I believe your coin is altered.</p><p>Vinegar is an aqueous solution of acetic acid and trace chemicals that may include flavorings. The cent is not pure copper so that some acids may dissolve the tin more than the copper. It is hard to say just what your coin may have been exposed to.</p><p>May have been in an auto&#039;s cup holder with spilled soda. Its all about Ph and time.</p><p><a href="https://www.usgs.gov/special-topic/water-science-school/science/ph-and-water?qt-science_center_objects=0#qt-science_center_objects" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.usgs.gov/special-topic/water-science-school/science/ph-and-water?qt-science_center_objects=0#qt-science_center_objects" rel="nofollow">https://www.usgs.gov/special-topic/water-science-school/science/ph-and-water?qt-science_center_objects=0#qt-science_center_objects</a>[/QUOTE]</p><p><br /></p>

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