STABILISED CHLORINE - Pool Sanitiser & Swimming Pool Water Treatment (Australia)

Stabilised Chlorine 10kg Pail – Sodium Dichloroisocyanurate NaDCC 56% Available Chlorine Outdoor Pool Sanitizer (Australia)

Stabilised chlorine 10kg is an industrial-strength, premium outdoor aquatic sanitizer directly imported from Australia (Made in Australia). Formulated with pure sodium dichloroisocyanurate pool grade (NaDCC / SDIC) at an active concentration of 999.25 g/kg, it delivers a guaranteed 56 available chlorine nadcc content (560 g/kg). Featuring built-in isocyanurate stabilizer protection, this sun protected chlorine pool formulation shields active chlorine from rapid photolytic destruction caused by solar ultraviolet (UV) radiation, allowing it to persist 3 to 5 times longer than unstabilized chlorine under intense outdoor sunlight. As a 100% fast-dissolving granular sanitizer with a near-neutral pH profile, it effectively kills bacteria and controls green and yellow algae without creating calcium haze or dropping pool alkalinity. Certified under international dangerous goods transport code un 3077 pool chemical bulk, this 10kg square pail is the premier choice for commercial resorts and facility managers looking to procure high-efficiency pool stabilised chlorine australia at competitive wholesale pricing.

Technical Specification Standards – Stabilised Chlorine 10kg Pail (Australia)

Alternate Daily Dosage Guide from Official Product Label

* Standard alternate daily application rates to maintain optimal free chlorine residual in outdoor pools:

Solar Photolysis Protection & Technological Advantages of NaDCC 56%

• Innate Solar UV Radiation Protection: In unshaded outdoor pools, solar ultraviolet (UV) radiation rapidly photolyzes unstabilized free chlorine, destroying up to 90% of available sanitizer within two hours[cite: 1, 2]. As Sodium Dichloroisocyanurate dissolves, it hydrolyzes to form hypochlorous acid (HOCl) while releasing an isocyanurate ring (cyanuric acid) that acts as an optical solar shield[cite: 1, 2]. This protective equilibrium extends chlorine persistence 3 to 5 times longer, drastically cutting daily sanitizer replenishment costs[cite: 1, 2].
• 100% Complete Dissolution with Zero Calcium Clouding: Unlike calcium hypochlorite (cal-hypo 70%) which adds insoluble calcium hardness that clouds water and scales filter grids, NaDCC dissolves rapidly into a clear solution[cite: 1, 2]. It also dissolves much faster than slow-dissolving Trichlor 200g tablets, making it suitable for both routine maintenance and shock dosing[cite: 1, 2].
• Near-Neutral pH Profile: Dissolved NaDCC produces a solution with a pH close to neutral (pH ≈ 6.5 – 7.0). It does not depress total alkalinity or sharply drive down pH like Trichloroisocyanuric acid (TCCA pH 2.6 – 3.2), nor does it drive pH upward like liquid bleach, making overall water balancing significantly simpler[cite: 1, 2].
• Broad-Spectrum Antimicrobial & Algal Eradication: The rapid release of uncharged hypochlorous acid (HOCl) allows swift permeation through microbial lipid bilayers, neutralizing bacterial pathogens, viruses, and emerging green or mustard algae spores to maintain sparkling water clarity[cite: 1, 2].

Recommended Water Chemistry Standards & Critical Contraindications

To maximize biocidal efficiency and avoid chlorine lock, facility operators should maintain the following water parameters[cite: 2]:

• Stabiliser Concentration (Isocyanurate / Cyanuric Acid): Maintain between 25 – 50 mg/L (ppm)[cite: 2].
  CRITICAL OPERATIONAL ADVISORY: DO NOT EXCEED 100 mg/L (Do not exceed 100 mg/L)[cite: 2]. When stabilizer levels exceed 100 ppm, "chlorine lock" occurs, over-stabilizing the chlorine and rendering it unable to sanitize despite adequate free chlorine readings[cite: 2]. If this occurs, dilution by draining and refilling water is required[cite: 2].
• Total Alkalinity (TA): Maintain a minimum of 60 mg/L (ppm), ideally 80 – 120 ppm[cite: 2].
• Free Available Chlorine: Maintain a residual of 2 – 3 mg/L (ppm)[cite: 2].
• Pool Water pH: Maintain within the range of 7.2 – 7.6[cite: 2].

Standard Operating Dosing Protocol

• Step 1 – Baseline Testing & Balancing: Test free chlorine, pH, total alkalinity, and cyanuric acid using a reliable pool test kit[cite: 2]. Adjust pH to 7.2 – 7.6 and total alkalinity to at least 60 ppm (ideally 80 – 120 ppm)[cite: 2].
• Step 2 – Measure Required Dosage: Cross-reference pool volume with the alternate daily dosage table (e.g., 135 g for 30 m³, 225 g for 50 m³) to accurately weigh the granular chlorine[cite: 2].
• Step 3 – Pre-Dissolution & Application:
  • Ensure the circulation pump and filter are running.
  • Fill a clean plastic bucket with pool water, slowly add the measured granules, and stir gently with a plastic rod until fully dissolved.
  • Broadcast the solution evenly around the pool perimeter, targeting areas directly in front of return inlet jets for rapid hydraulic distribution.
• Step 4 – Post-Dosing Filtration & Monitoring: Keep the filtration system running for at least 2 to 4 hours post-application[cite: 2]. Test free chlorine regularly to maintain a 2 – 3 ppm residual, and monitor stabilizer levels to ensure they do not exceed 100 ppm[cite: 2].

Commercial Supply Policy at THP Chemical

Tan Hung Phu Chemical Co., Ltd. (THP Chemical) is a direct importer and wholesale distributor of Stabilised Chlorine 10kg Pail (Australia) supplying commercial resorts, aquatic facilities, and pool maintenance contractors nationwide[cite: 3]:

• 100% genuine Australian import (Made in Australia) supplied in original white square pails of 10 Kg Net (10kg NET) with heavy-duty handles and fresh manufacturing dates[cite: 3].
• Guaranteed active chemical assay: 999.25 g/kg Sodium Dichloroisocyanurate providing 56% available chlorine with integrated solar UV stabilization.
• Complete regulatory compliance documentation: Full Material Safety Data Sheet (MSDS), detailed technical application manuals, and official VAT invoices provided with each dispatch.
• Substantial inventories maintained at our central Ho Chi Minh City logistics center, supporting rapid palletized dispatch nationwide at competitive wholesale volume pricing[cite: 3].

Frequently Asked Questions (FAQ)

1. What is the fundamental difference between Stabilised Chlorine and standard 70% Calcium Hypochlorite?

Standard 70% Calcium Hypochlorite is an unstabilized chlorine that degrades rapidly under solar UV radiation within hours and introduces calcium hardness that can cloud water[cite: 1, 2]. Stabilised Chlorine contains NaDCC, which releases cyanuric acid to shield chlorine molecules from UV degradation[cite: 1, 2]. It lasts 3 to 5 times longer in outdoor sunlight, dissolves completely without calcium haze, and maintains stable water pH[cite: 1, 2].

2. What is "Chlorine Lock" and why does the label prohibit stabilizer levels exceeding 100 ppm?

The isocyanurate stabilizer (cyanuric acid) bonds with free chlorine to shield it from sunlight[cite: 2]. However, without regular splash-out or water replacement, cyanuric acid accumulates[cite: 2]. When stabilizer levels exceed 100 ppm, chlorine molecules become over-stabilized (locked), severely impairing hypochlorous acid (HOCl) release[cite: 2]. In this state, algae can bloom despite high total chlorine readings[cite: 2]. Keeping stabilizer between 25 and 50 ppm (and strictly below 100 ppm) prevents this issue[cite: 2].

3. Why must Stabilised Chlorine NOT be used in indoor heated pools or commercial spas?

Indoor heated pools and spas receive no direct sunlight, meaning active chlorine is not subject to UV breakdown[cite: 2]. Using stabilized chlorine in these facilities causes rapid, unnecessary cyanuric acid accumulation, leading to chlorine lock and increased chemical vapor build-up in enclosed spaces[cite: 2]. Unstabilized sanitizers (such as Calcium Hypochlorite or salt chlorination) should be used indoors[cite: 2].

4. Does THP Chemical provide batch MSDS and VAT invoices for 10kg pail orders?

Yes. THP Chemical provides full Material Safety Data Sheets (MSDS), manufacturer technical application guidelines, and legal commercial VAT invoices with every wholesale order to satisfy corporate procurement and regulatory audits.