Product Notes
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When used, the ideal range for cyanuric acid is 30 – 50 ppm. The concentration should not exceed 100 ppm. Cyanuric acid is not recommended for indoor pools or spas where protection from sunlight is not necessary.The 100 ppm limit is a common consensus among health authorities, for example:
| CDC | 100 ppm |
| WHO | 100 ppm |
| State Standard | 100 ppm |
There is a degree of uncertainty in setting this value, but the consensus decision is not entirely arbitrary. The following factors were considered when setting the limit for cyanuric acid:
- Effective use levels of cyanuric acid;
- Cyanuric acid/chlorine equilibria;
- Effect of cyanuric acid on Oxidation Reduction Potential (ORP); and
- Effect of cyanuric acid on chlorine kill rates.
Test kits and strips are available for testing the cyanuric acid concentration to ensure that it is within the proper range. If the cyanuric acid concentration needs to be reduced the following approaches may be used:
- Partially drain and refill the pool
- Increase backwash times or frequency
- Follow appropriate water replacement intervals
At above 50 ppm of cyanuric acid, the time it takes to kill bacteria in the water is longer compared to swimming pool water without cyanuric acid. Also, as the level of cyanuric acid builds up, the chlorine will become increasingly less effective in keeping the water clean and problems such as increased cloudiness and exceeding combined chlorine limits can occur.
Note :
- Cyanuric acid and stabilized chlorine (dichlor or trichlor) should only be used in outdoor swimming pools. It should never be used in indoor swimming pools, spas or hot tubs.
- Both dichlor and trichlor release cyanuric acid to the pool water. It is not necessary to put additional cyanuric acid into a pool that uses dichlor or trichlor.
- Pools that use cyanuric acid are required to maintain a free chlorine residual of 2.0 ppm.
- Cyanuric acid should be tested at least once a month.
- Cyanuric acid levels must be maintained below 100 ppm.
- Partially drain pool and add water to reduce cyanuric acid concentration.
Application methods will depend upon the product form being used. Cyanuric acid is available in both granular and liquid slurry forms. Since the granular form is slow to dissolve, if it is fed into the skimmer, care must be taken to feed the product slowly to avoid blocking the lines. Most granular cyanuric acid products are approximately 100% active. The following table summarizes the cyanuric acid contributions from dichloro-striazinetrione and trichloro-s-triazinetrione.
For manufacture of chlorinated isocyanates. Its mainly used in synthesizing new type bleaching agent, resin, anti-oxidant, paint, coating, selective weedkiler and metal cyaniding slow corrodent. And it also can be directly used as swimming pool chlorine stabilizer,nylon, plastic, polyseter, fire-retardant agent and cosmetics additive.
Future & Benefit :
- Stabilizes chlorine to help prevent degradation of active chlorine by sunlight
- Also commonly known as “stabilizer” or “conditioner”
- May be added to the pool as CYA, sodium salt of cyanuric acid, or as the chlorinated forms of cyanuric acid, sodium dichloro-s-triazinetrione (dichlor) and trichloro-striazinetrione (trichlor)
- The effect of cyanuric acid on slowing the oxidation of organics, kill rates of bacteria, viruses, and algae has been demonstrated, primarily in laboratory studies. However, disease outbreaks linked to cyanuric levels in properly sanitized pools have not been reported.
- Cyanuric acid does not stabilize bromine sanitizers
- Cyanuric acid contributes to total alkalinity (See Alkalinity Information Bulletin)
PRECAUTIONS
In order to safely use and handle cyanuric acid products, all individuals involved in their manufacture, distribution, sale, or use should be trained and knowledgeable about their properties. Safety information is available on the product label, product MSDS (Material Safety Data Sheet), and manufacturer’s training materials. This safety information will include disposal instructions, instructions on disposal of the package, and spill response information.
For safety and handling information for stabilized chlorine compounds, refer to manufacturer’s labels and appropriate Information Bulletins. Cyanuric acid is stable when stored in a cool, dry, ventilated area and not contaminated by other chemicals such as bases or chlorinated pool chemicals. Cyanuric acid, dichloro-s-triazinetione and trichloro-striazinetrione, in the solid form or in concentrated solutions, shall not be mixed with other pool chemicals including other chlorinating agents. Partially empty packages must not be consolidated, as this could result in dangerous mixing with incompatible dry chlorinating agents having a similar appearance.
