CDS Made In An All-Glass, Gas-Tight Container In 3 Hours
- CLO2
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01 Sep 2025 11:00 - 01 Sep 2025 12:46 #87361
by CLO2
CDS Made In An All-Glass, Gas-Tight Container In 3 Hours was created by CLO2
CDS Made In An All-Glass, Gas-Tight Container In 3 Hours
Test #2 for this 250ml flask. Same recipe as before. Measurements will be taken later.
Polishing the bottle neck-to-stopper joint and applying water to the joint as it was being closed, has stopped all CLO2 gas leakage from the flask. Nothing smelled.
And, as a reminder, this bottle is all glass including the "cap" (stopper). The glass-to-glass joint does not use any plastic seal, only water-wet glass.
+3 hours. It is now in the fridge where it will cool down and activate a little more. Will take measurements later today.
This method is called "Quick CDS-Dry" and there is also a "QCDS-Wet" method.
SCF = Sodium Chlorite Flakes
CAC = Citric Acid Crystals
Citric acid does not gas into CDS, but 4% HCL does. That raises the TDS (total dissolved solids) creating a "dirty" CDS.
SCF can be stored for at least 20 years, and CAC at least 12 years.
Sodium chlorite solution begins to lose potency at about 18 months, and 4% HCL will last about 3 years.
Test #2 for this 250ml flask. Same recipe as before. Measurements will be taken later.
Polishing the bottle neck-to-stopper joint and applying water to the joint as it was being closed, has stopped all CLO2 gas leakage from the flask. Nothing smelled.
And, as a reminder, this bottle is all glass including the "cap" (stopper). The glass-to-glass joint does not use any plastic seal, only water-wet glass.
+3 hours. It is now in the fridge where it will cool down and activate a little more. Will take measurements later today.
This method is called "Quick CDS-Dry" and there is also a "QCDS-Wet" method.
SCF = Sodium Chlorite Flakes
CAC = Citric Acid Crystals
Citric acid does not gas into CDS, but 4% HCL does. That raises the TDS (total dissolved solids) creating a "dirty" CDS.
SCF can be stored for at least 20 years, and CAC at least 12 years.
Sodium chlorite solution begins to lose potency at about 18 months, and 4% HCL will last about 3 years.
- Transborder9
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06 Feb 2026 19:45 #87901
by Transborder9
Replied by Transborder9 on topic CDS Made In An All-Glass, Gas-Tight Container In 3 Hours
Another question? Does anyone know the size of that glass tube? 
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08 Feb 2026 03:23 - 08 Feb 2026 03:33 #87904
by CLO2
I have since chosen a different shaped bottle for making QCDS-D ("Dry" method). Now use wide mouth bottles that have open, hollow glass stoppers and the glass activator test tube extends into the stopper's hollow opening. By doing that, there is less chance of spilling reactor solution into the CDS and makes for easy removal of the reactor using only fingers.
The goal of this test was to make 1500ppm CDS and that was achieved.
Replied by CLO2 on topic CDS Made In An All-Glass, Gas-Tight Container In 3 Hours
The glass reactor test tube used in the 250ml bottle was probably 20mm x 100mm. You would have to measure your bottle to find out what size test tube would fit.Another question? Does anyone know the size of that glass tube?
I have since chosen a different shaped bottle for making QCDS-D ("Dry" method). Now use wide mouth bottles that have open, hollow glass stoppers and the glass activator test tube extends into the stopper's hollow opening. By doing that, there is less chance of spilling reactor solution into the CDS and makes for easy removal of the reactor using only fingers.
The goal of this test was to make 1500ppm CDS and that was achieved.
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