Where to Buy Chlorine for Water Treatment? 2026 Price for Dolphin Chlorine Ca(OCl)2

What is Chlorine Ca(OCl)2?

Chlorine (chemical name Calcium Hypochlorite, formula Ca(OCl)2, CAS 7778-54-3) is an inorganic compound that exists as a white powder or tablet, soluble in water and releasing active chlorine (in the form of hypochlorous acid HOCl and OCl⁻ ion) — the main disinfectant in water treatment. In the market, the product is also known by trade names such as chlorine bleaching powder, HTH, or industrial Calcium Hypochlorite.

Unlike Javen (Sodium Hypochlorite NaOCl) — a liquid solution with low active chlorine content (10–12.5%) and prone to decomposition — Chlorine in solid form is concentrated, with 5–7 times higher active chlorine content per kg of product, reducing transportation costs and extending shelf life when stored properly. This is why many remote water supply stations and aquaculture farms prefer powdered Chlorine over liquid Javen for storage needs.

Dolphin Chlorine Super Chlor is a Chlorine Ca(OCl)2 line supplied by Loc Thien Chemical, with active chlorine content ≥70% (70% min), origin China, packed in 45kg drums. Loc Thien supplies this product to factories, water supply stations, aquaculture farms, and wastewater treatment units nationwide — see specifications and order directly at the product page Dolphin Chlorine Ca(OCl)2 China.

Technical Specifications of Dolphin Chlorine Super Chlor

The table below summarizes the key specifications of Dolphin Chlorine Super Chlor according to current product information at Loc Thien:

Active chlorine content ≥70% is the most important specification when buying Chlorine — it is the basis for accurate dosage calculation and true price comparison between suppliers (see the Reference Price List & How to Calculate Chlorine Price section for conversion methods). Each batch of Dolphin Chlorine Super Chlor at Loc Thien comes with MSDS/COA provided upon request, allowing B2B customers to verify actual content before stocking.

Tran Minh Tuan — Head of Technical Department, Loc Thien Chemical: “When customers ask about buying chlorine, the first question we ask back is what the active chlorine content is and what it will be used for — water supply, aquaculture ponds, or wastewater treatment. Because the dosage and frequency of chlorine dosing directly depend on this number; a one-size-fits-all formula cannot be applied. With Chlorine ≥70% active chlorine, one 45kg drum is equivalent to the active chlorine content of about 3–3.5 drums of 12% Javen of the same weight — this is the figure customers need to compare actual costs.”

Where to Buy Chlorine? 3 Criteria for Choosing a Supplier

Chlorine is a strong oxidizing chemical; errors in storage or purchasing from sources with unclear content can cause significant damage to water treatment systems or ponds. When looking for where to buy Chlorine, check these 3 criteria:

1. Has COA/MSDS per batch — COA confirms the actual active chlorine content of the specific batch (not just what’s printed on the package), MSDS provides chemical safety information for the internal management records of the factory or farm.
2. Warehouse near the usage area — Powdered Chlorine is more stable than Javen but still gradually loses active chlorine content over storage time, especially in hot, humid environments. A nearby supply source reduces storage time before reaching the customer.
3. Has experience serving your specific application industry — a supplier that serves water supply, aquaculture, and wastewater treatment will advise dosage according to application specifics, avoiding inappropriate one-size-fits-all dosing.

Loc Thien Chemical (Tax ID 0313650856) supplies Dolphin Chlorine Super Chlor Ca(OCl)2 to factories, water supply stations, aquaculture farms, and wastewater treatment units nationwide, with COA/MSDS per batch provided upon customer request.

Reference Price List & How to Calculate Chlorine Price

Chlorine prices are not fixed — they fluctuate based on order volume, delivery area, and raw material market conditions. Below is a reference price range based on common market specifications:

*Source: survey of market prices for industrial Chlorine in Vietnam, September 2026 (compiled from multiple suppliers) — this is NOT the official selling price of Loc Thien Chemical. Actual price depends on the specific contract, volume, and delivery point. See how to contact for a quote at the end of the article.

How to compare quotes correctly: convert to price per kg of active chlorine instead of comparing price per kg of raw product. A drum of Chlorine ≥70% active chlorine may be “more expensive” in price per kg compared to Javen 10-12%, but much cheaper in price per kg of actual active chlorine — the figure that truly reflects operational disinfection cost. For example: a 45kg drum of 70% Chlorine contains 31.5kg of active chlorine, while 45kg of 12% Javen contains only 5.4kg of active chlorine — a nearly 6-fold difference.

Practical Applications of Chlorine in Water Treatment

Disinfection of Drinking Water and Water Supply

Chlorine is dosed into water after filtration to kill pathogenic microorganisms (E. coli, Coliform, intestinal pathogens) before distribution to users. At remote or small-scale water supply stations that have not installed automatic chlorine gas or Javen dosing systems, powdered Chlorine is a practical choice because it is easy to transport, easy to mix manually, and does not require complex dosing pump equipment.

Aquaculture — Pond Treatment for Shrimp and Fish

In aquaculture, Chlorine is used to treat ponds before stocking (eliminating residual pests, pathogens, parasites from the previous crop) and to treat incoming water. This is one of the most common applications of powdered Chlorine in shrimp and pangasius farming areas in the Mekong Delta and coastal provinces — where Chlorine is easier to store and transport than liquid Javen over long distances.

Hospital and Food Facility Sanitation

Chlorine is used to prepare disinfectant solutions for surfaces, tools, and production areas in hospitals and food processing facilities — where rapid and thorough disinfection is required. The concentration varies by purpose: routine surface disinfection uses lower concentrations than disinfection of high-risk areas (isolation wards, medical waste treatment areas).

Wastewater Treatment — Organic Oxidation, Odor Control

In wastewater treatment, Chlorine acts as an oxidizing agent to break down odor-causing organic compounds (H2S, reduced sulfur compounds) and to disinfect wastewater after biological treatment before discharge into receiving waters, meeting microbiological standards (Coliform, E. coli) in wastewater regulations.

Case Study: Disinfecting Aquaculture Ponds with Chlorine

A shrimp farm with a 5,000 m³ pond in a coastal aquaculture area in the Western region uses Chlorine Ca(OCl)2 ≥70% to treat the pond before a new crop. The procedure is as follows:

1. Drain the pond, dry the pond bottom for 5-7 days to remove accumulated organic matter from the previous crop.
2. Fill the pond with water to the required level, measure the actual water volume before calculating the Chlorine dosage.
3. Calculate Chlorine dosage based on a target concentration of 20-30 ppm active chlorine for full pond disinfection — for a 5,000 m³ pond and 70% active chlorine Chlorine, the required amount ranges from 140-215 kg (equivalent to 3-5 drums of 45kg), depending on the level of bottom contamination and the density of pests to be treated.
4. Dissolve Chlorine in water before broadcasting over the pond, avoid spreading dry powder directly to prevent uneven distribution.
5. Wait 5-7 days for residual chlorine to completely dissipate before stocking shrimp post-larvae — check with a residual chlorine test kit, ensure the concentration is 0 ppm to avoid killing the newly stocked shrimp.

Result: The pond met the requirements for eliminating residual pests and pathogens, with no signs of disease detected in the first 30 days of the new crop. The cost of pond treatment with Chlorine was lower than using potassium permanganate (KMnO4) for the same area, and the decomposition time of residual Chlorine was easier to control with a standard test kit.

Note: Actual dosage needs to be adjusted according to water pH, temperature, bottom organic matter content, and recommendations from aquaculture technicians — the above figures are references from theoretical calculations based on ≥70% active chlorine content and do not replace specific technical guidance for each pond.

Disinfection Dosage by Application

Chlorine dosage depends on the purpose, incoming water quality, and required microbiological output. The table below provides reference levels calculated as active chlorine (ppm = mg/L active chlorine, not mg/L of raw product):

How to calculate actual dosage from 70% Chlorine: to achieve X ppm active chlorine in V m³ of water, the required mass of 70% Chlorine = (X × V) / 700 (kg), because 1 kg of 70% Chlorine contains 0.7 kg active chlorine = 700g. For example, to achieve 20 ppm in a 1,000 m³ pond: (20 × 1,000) / 700 ≈ 28.6 kg of 70% Chlorine.

Specific dosages always need to be adjusted according to actual conditions (temperature, pH, organic load, chlorine demand of the water) — it is advisable to test on a small scale or consult a technician before full-scale application to the entire system.

Storage & Safety When Using Chlorine

Chlorine Ca(OCl)2 is a strong oxidizing agent that can cause fire or exothermic decomposition if in contact with organic materials, oils, or if stored improperly. Principles for safe storage and use:

Storage:

• Keep in a dry, cool place, away from direct sunlight — high temperatures accelerate decomposition, reducing active chlorine content over time.
• Seal the drum tightly after each use to prevent moisture absorption — Chlorine that absorbs moisture will cake and lose active chlorine content.
• Absolutely do not store near flammable materials, oils, acids, or ammonia — reactions can produce toxic chlorine gas or cause fire/explosion.
• Store in a separate, well-ventilated area, away from living quarters and heat sources.

PPE when handling:

• Chemical-resistant gloves (nitrile or rubber)
• Tight-fitting safety goggles or face shield
• Dust mask when weighing and mixing
• Long-sleeved protective clothing to avoid direct skin contact with Chlorine dust

Spill cleanup: Collect dry Chlorine with clean tools, avoid mixing with organic materials or water containing ammonia. Do not use flammable materials for cleanup. The spill area should be well-ventilated before personnel without PPE return to work.

Packaging & Transportation

Dolphin Chlorine Super Chlor is packed in 45kg drums and delivered by road truck — this is the appropriate transportation method for solid/powder chemicals, unlike liquid chemicals (such as Javen, HCl) which require specialized tanker trucks. Loc Thien delivers according to the number of drums that match customer needs, from a few drums to large quantity orders by the ton.

During transport, Chlorine drums must be kept upright, avoid strong impacts, and not stacked too high to prevent drum breakage or lid opening that could cause powder leakage during loading and unloading.

Get a Chlorine Quote Now

Loc Thien Chemical supplies Dolphin Chlorine Super Chlor Ca(OCl)2 ≥70%, packed in 45kg drums, origin China, with MSDS/COA per batch. Call 0979 891 929 to receive a quote within 15 minutes based on the number of drums and delivery point, or send a request via email [email protected].

Advantages of buying Chlorine at Loc Thien:

• MSDS/COA per batch — provided upon request to verify active chlorine content before receiving goods
• Nationwide road delivery, suitable for both small and large quantity orders
• Dosage consultation according to specific applications: water supply, aquaculture ponds, WWTP
• Tax ID 0313650856 — clear legal entity, full VAT invoices

See also: Comparison of Javen and Powdered Chlorine in Water Disinfection · Buy Industrial Javen NaOCl — Price Quote 10%, 12%

Frequently Asked Questions

Loc Thien INVESTMENT AND DEVELOPMENT COMPANY LIMITED Tax ID 0313650856 — Industrial chemical supply in Binh Duong. Hotline: 0979 891 929 · Email: [email protected] · Website: hoachatlocthien.com

Industrial Field Operation & Batch Quality Verification

1. Incoming Batch COA Verification & Regulatory Compliance (Law on Chemicals 69/2025/QH15)

When operating industrial water treatment, surface finishing, or textile dyeing lines in Vietnam, engineering teams must verify every chemical delivery against its batch-specific Certificate of Analysis (COA) and 16-section GHS Safety Data Sheet (SDS). Under the Vietnam Law on Chemicals No. 69/2025/QH15, Decrees 24/2026/ND-CP, 25/2026/ND-CP, and 26/2026/ND-CP, and QCVN 40:2025/BTNMT on industrial wastewater discharge:

• Specific Gravity & Assay Verification: Upon arrival of a 5–30-ton tanker or IBC tote shipment, plant QA technicians measure specific gravity at 20 °C using a calibrated hydrometer and cross-check active concentration against the batch COA issued by Loc Thien Chemical and verified via Quatest 3 (ISO/IEC 17025).
• Impurity & Heavy Metal Control: Trace heavy metals (Fe, Pb, As, Hg, Cd, Cr⁶⁺) and insoluble matter are strictly controlled to prevent catalyst poisoning in Fenton reactors, membrane fouling in RO/UF systems, or shade deviations in reactive textile dyeing.
• ZDHC MRSL v3.1 Level 1 Portfolio Boundary: For export-oriented textile and footwear FDI factories, Loc Thien Chemical maintains official ZDHC MRSL v3.1 Conformance Level 1 documentation for exactly 9 core products: four products certified by TUV SUD Product Service GmbH (NaOH, H2O2, Na2SO4, Na2CO3) and five products verified via Conformance Summary Report (CSR) and Analytical Test Report by TUV Rheinland Vietnam (H2SO4, FeCl2, HCl, Javel/NaOCl, PAC 31%).

2. Dosing Optimization, Storage Materials & Preventive Maintenance

1. Compatible Wetted Materials: Use cross-linked high-density polyethylene (XLPE / HDPE), polypropylene (PP-H), fiberglass-reinforced plastic (FRP with vinyl ester resin), or PTFE/PVDF-lined piping depending on corrosive and thermal conditions. Avoid unlined carbon steel or incompatible elastomers.
2. Automated Dosing Control: Integrate diaphragm metering pumps with real-time pH, ORP (mV), turbidity, or conductivity sensors. Always perform a 5-beaker Jar Test whenever raw water COD, TSS, or alkalinity shifts by more than 15%.
3. Secondary Containment & PPE: Storage tanks must sit inside an acid/alkali-resistant bund wall holding at least 110% of the largest tank volume. Operators handling unloading hoses must wear splash-proof chemical goggles, acid/alkali-resistant nitrile or neoprene gloves, face shields, and emergency respirators.

3. Multi-Role B2B Value Matrix (Procurement · QA/EHS Engineer · Plant Director)

• For Procurement Managers: Loc Thien Chemical is the direct manufacturer of FeCl2 30% solution and FeCl3 38–40% wastewater grade (3,000+ tons/month capacity), and a Tier-1 bulk commercial supplier of NaOH, HCl, H2SO4, PAC, NaOCl, H2O2, FeSO4, and Na2SiO3. Pricing is transparently structured around 5 technical cost drivers (active assay, packaging format, delivery distance from our 6 warehouses, order volume, and scheduled contract cadence) with a 15-minute technical quotation SLA.
• For Environmental & Process Engineers: Full technical support for Jar Test optimization, stoichiometry calculation, sludge minimization, and QCVN 40:2025/BTNMT compliance auditing.
• For FDI Plant Directors: Guaranteed supply continuity via 6 regional warehouses (Ba Ria - Vung Tau, Dong Nai, Binh Duong, Da Nang, Can Tho, Bac Ninh) and a dedicated 5–30-ton tanker fleet (4 hours in inner HCMC, 24–48 hours across Southern & Mekong Industrial Parks, 2–3 days in Northern & Central Vietnam).

4. Related Technical Resources & 15-Minute Quotation Gateway

• Explore our full industrial catalog: Industrial Chemical Catalog | Technical Knowledge Hub | Request a 15-Minute Technical Quote
• Legal Head Office: 452/6B Tinh Lo 10, Binh Tri Dong Ward, Binh Tan District, Ho Chi Minh City, Vietnam (Head Office only — all physical stock is dispatched from our 6 regional industrial park warehouses).
• 24/7 Technical Hotline: 0979 891 929 (Please contact hotline 0979 891 929 for detailed delivery procedures) | Official Email: [email protected]