I don't know where this "dark amber color" description came from.
My suspicion is that it occurs when you use Citric Acid for the activator.
I've always used HCl as the activator, and the color is a (very) light yellow-ish green.
(or greenish yellow)
The more drops you activate, the darker it does get.
I have to activate 10 or 20 drops or more (for baths) for it to turn
a dark(er) amber color.
My premixed "pre-activated" CDS (24,000 ppm; MMS drop-for-drop equivalent)
is the same light yellow-green color.
You can get ClO2 Test Strips to test the ppm of your activated solution.
See my website, link below. (Menu: 'Using MMS/CD/ClO2')
These can be used to make sure the activation is occurring, that your solutions
are good and working, etc.
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ASpoonfulOfMedicine.com, falls under the Disclaimer on my website.
Disclaimer:These statements have not been evaluated by the Food and Drug Administration. This substance, MMS (Master Mineral Solution), has not been FDA approved to diagnose, cure, mitigate, treat, or prevent any disease. Chlorine Dioxide is also called MMS throughout this website. Chlorine Dioxide Solution also known as MMS (Master Mineral Solution) is made of Sodium Chlorite 28% (22.4 Sodium Chlorite 5.6% Inert Salts and the remainder water) and an acid activator (usually 50% Citric Acid or 4% Hydrochloric Acid). License: Except where otherwise noted, content on this site is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.