What color does Alizarin Red S staining produce for calcium deposits?

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Multiple Choice

What color does Alizarin Red S staining produce for calcium deposits?

Explanation:
Alizarin Red S staining detects calcium deposits by binding to calcium salts such as hydroxyapatite, forming a bright orange-red complex. This makes mineralized areas stand out with an orange-red hue, while unmineralized matrix remains pale. The color is distinctive for calcium, so it doesn’t appear blue, green, or purple like other stains—those colors come from different dyes or staining methods. The orange-red result is specifically indicative of calcium deposits in the tissue.

Alizarin Red S staining detects calcium deposits by binding to calcium salts such as hydroxyapatite, forming a bright orange-red complex. This makes mineralized areas stand out with an orange-red hue, while unmineralized matrix remains pale. The color is distinctive for calcium, so it doesn’t appear blue, green, or purple like other stains—those colors come from different dyes or staining methods. The orange-red result is specifically indicative of calcium deposits in the tissue.

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