Why SDIC Dihydrate Is a Reliable Chlorine Disinfectant for Water Treatment?
Sodium Dichloroisocyanurate Dihydrate
Water Treatment Guide
Sodium Dichloroisocyanurate dihydrate has long been recognized as a reliable chlorine-based solid disinfectant for water treatment. With stable chemical properties, broad-spectrum sterilization capacity, and mild formula characteristics, it is widely adopted in swimming pool maintenance and daily water sanitation scenarios.
1. Characteristics
SDIC dihydrate is a stable, chlorine-containing solid disinfectant, typically appearing as white tablets or granules with a faint chlorine odor. Unlike liquid bleach, SDIC is easier to handle and store for long periods.
- Solubility: It has a solubility of 25g in water at 25°C.
- pH Value: The pH value of its aqueous solution typically ranges between 5.5 and 7.0. This mild acidity ensures that the disinfectant does not cause drastic fluctuations in water pH, making it compatible with most aquatic environments.
- Broad-Spectrum Efficacy: The sterilization range is wide and the sterilization effect is excellent.
2. Sterilizing Effect
SDIC dihydrate demonstrates rapid and high-efficiency killing power. Based on some data, we can roughly assess the disinfection effect of sodium dichloroisocyanurate dihydrate.(Taking E. coli as an example):
1. High Concentration Performance: At an available chlorine concentration of 1.5 mg/L, it can completely kill E. coli within just 0.5 minutes, reducing the colony count to 0 cfu/100ml.
2. Low Concentration Performance: Even when the concentration is reduced to 0.15 mg/L, a complete inactivation of E. coli is achieved by extending the contact time to 2 minutes.
This demonstrates that SDIC dihydrate maintains excellent germicidal capabilities even at low dosages, effectively preventing the waste of chemicals while minimizing the risk of irritation from excess chlorine.
3. Adaptability to Environmental Factors
In real-world scenarios, water temperature, pH levels, and organic matter content often interfere with disinfection. SDIC dihydrate are engineered to withstand these complex conditions.
Temperature Resilience
From 5℃ to 31℃, the bactericidal effect stays stable and dependable. Whether in cold winter waters or heated summer pools, a concentration of 1.5 mg/L with 30 minutes of contact time ensures complete and consistent disinfection. This makes it ideal for use in various climates and seasonal conditions.
pH Tolerance
Within a pH range of 6.5 to 8.5, the disinfection rate remains stable. Operators do not need to perform frequent, aggressive pH adjustments to accommodate the disinfectant, simplifying the daily maintenance routine.
Impact of Organic Matter
Organic matter typically consumes available chlorine, reducing efficacy. However, as long as the water color (chromacity) does not exceed 15°, SDIC dihydrate maintains its stable killing power. This is particularly useful for natural water sources or public swimming pools where light organic contamination is common.
4. Application in Swimming Pools
The swimming pool water is a water body prone to microbial growth and with a high density of people. Therefore, the requirements for disinfectants are even more stringent.
By adding a solution of sodium dichloroisocyanurate with an effective chlorine content of 1.5mg/L to the swimming pool water, and allowing it to act for 30 minutes, the swimming pool water can reach the qualified standard.
| Detection Time | Average Coliform Bacteria (cfu/L) | Average Total Bacteria Count (cfu/mL) | Residual Chlorine (mg/L) |
|---|---|---|---|
| Before Disinfection | 472 | 177 | 0 |
| After Disinfection | 0 | 39 | 0.5 |
| Standard Value | ≤ 20 | ≤ 200 | 0.3 ~ 0.5 |
SDIC dihydrate can rapidly and effectively purify swimming pool water, ensuring that all water quality indicators meet hygiene standards. At the same time, it maintains a stable residual chlorine level, providing a safe and hygienic water environment for swimmers. It is suitable for long-term use in various public swimming pools and private swimming pools.
5. Safety Assessment
The safety of disinfectants is directly related to human health. Especially for water disinfectants with high-frequency human exposure, strict toxicity testing is indispensable. Relevant tests have been carried out by professional experimenters, and the test results are available for your reference.
Oral Toxicity Test
In the acute oral toxicity test, no toxic symptoms or deaths were observed in mice. In accordance with the disinfectant toxicity classification standards, it is classified as practically non-toxic. Even in cases of minor accidental contact or ingestion, it will not cause acute harm to the human body.
Skin Irritation Test
Skin is the part of the human body that comes into direct contact with disinfected water. The solution of this disinfectant showed no irritation to rabbit skin, with a skin irritation score of 0. This indicates its mild nature; it will not cause redness, itching, stinging or other discomfort upon skin contact, making it suitable for long-term exposure and use.
Why Choose SDIC Dihydrate?
Combining high germicidal efficacy, environmental resilience, and a high safety profile, SDIC dihydrate are a premium solution for water disinfection.
Ideal for drinking water and routine swimming pool maintenance.
Effectively blocks the transmission of waterborne pathogens, preventing intestinal infections and skin diseases.
Simplified dosing procedures and stability under various temperatures reduce long-term operational costs.