- What is ZEELCHEM™ 101?
- ZEELCHEM™ 101 is HEDP (1-hydroxyethylidene-1,1-diphosphonic acid, also known as etidronic acid) supplied as a 60 % aqueous solution.
- What is HEDP 60 used for?
- Main uses: cooling towers and closed loops, boilers and steam systems, oilfield and gas-field water, textile bleaching and dyeing.
- What is the typical dosage of HEDP 60?
- 1–10 mg/L (ppm) as product in cooling water; the final dose depends on water analysis. Use the dosing calculator on this page.
- What packaging is available?
- 65.0 kg net HDPE carboy.
- What is the price?
- Indicative price ₹ 150 per kg (ex-works Vadodara, GST extra), valid until 31-12-2026. Final price depends on quantity and delivery location; call +91-9724593964 for a firm quote.
- Do you deliver to my city?
- Yes. HEDP 60 is supplied Pan-India by road from Vadodara, Gujarat, to all states including Maharashtra, Tamil Nadu, Telangana, Delhi NCR, West Bengal and Madhya Pradesh.
- Who manufactures it?
- ZEEL PRODUCT, Vadodara, Gujarat, India — ISO 9001:2015, ISO 22000:2018 and ISO 14001:2015 certified. TDS, SDS and COA supplied.
Product overview
ZEELCHEM™ 101 is HEDP (1-hydroxyethylidene-1,1-diphosphonic acid, also known as etidronic acid) supplied as a 60 % aqueous solution. It is an organophosphonate scale and corrosion inhibitor that forms stable, water-soluble chelates with calcium, magnesium, iron, copper and zinc, and remains effective at temperatures up to about 250 °C.
HEDP inhibits calcium carbonate scale at sub-stoichiometric (threshold) doses, and at higher doses forms a protective film on steel that gives cathodic corrosion inhibition. Its hydrolytic stability is far better than that of inorganic polyphosphates, so it does not revert to orthophosphate and does not feed calcium phosphate deposits.
Beyond water treatment, HEDP is a chelant and peroxide stabiliser in textile bleaching, a sequestrant in detergents, a complexing agent in cyanide-free electroplating, and an ingredient in metal cleaning and descaling formulations.
Key features & benefits
- Threshold inhibition of CaCO₃ and CaSO₄ scale
- Cathodic corrosion inhibition; synergy with zinc and molybdate
- Chelates Ca, Mg, Fe, Cu, Zn ions
- Thermally stable up to approx. 250 °C
- Better hydrolytic stability than polyphosphates
- Peroxide stabiliser for textile and pulp bleaching
Applications
- Cooling towers and closed loops
- Boilers and steam systems
- Oilfield and gas-field water
- Textile bleaching and dyeing
- Detergents and industrial cleaners
- Cyanide-free electroplating
- Metal surface cleaning and descaling
- RO antiscalant formulations
Technical specifications
| Appearance | Colourless to light-yellow transparent liquid |
|---|---|
| Active content (as HEDP) | 58.0 – 62.0 % |
| Phosphorous acid (as PO₃³⁻) | ≤ 2.0 % |
| Phosphoric acid (as PO₄³⁻) | ≤ 0.8 % |
| Chloride (as Cl⁻) | ≤ 0.02 % |
| pH (1 % aqueous solution) | ≤ 2.0 |
| Density at 20 °C | ≥ 1.40 g/cm³ |
| Iron (as Fe³⁺) | ≤ 10 mg/L |
Values are typical specifications. Each consignment is supplied with a batch Certificate of Analysis. Custom specifications are available on request.
Dosage & method of use
As a scale inhibitor: 1 – 10 mg/L. As a corrosion inhibitor: 10 – 50 mg/L, usually with zinc salts or polymers. As a cleaning agent: 1 – 2 % solution. Exact dosage depends on water analysis and system design.
Dosing calculator
Estimates only. Evaporation is calculated as E = 0.00153 × R × ΔT (°C); blowdown B = E ÷ (COC − 1); product feed for cooling towers = B × dose. The right dose depends on your water analysis, metallurgy and operating conditions. Our technical team will confirm it free of charge.
Packaging
65.0 kg net HDPE carboy. Each carboy is labelled with product name, batch number, net weight and GHS hazard information.
Storage & shelf life
Store in original closed HDPE / stainless-steel containers in a cool, dry, well-ventilated and shaded area away from strong alkalis and oxidisers. Avoid freezing and prolonged direct sunlight. Shelf life: 12 months in unopened packing.
Handling & safety
Acidic product. Wear chemical goggles, nitrile/PVC gloves and protective clothing. In case of eye or skin contact, rinse with plenty of water for at least 15 minutes and seek medical advice. Refer to the ZEELCHEM™ SDS (GHS / CLP format) before handling.
Frequently asked questions
What is HEDP 60 used for?
HEDP 60 is used as a scale and corrosion inhibitor in cooling water, boilers and oilfields, and as a chelating agent in textiles, detergents, electroplating and metal cleaning.
What is the CAS number of HEDP?
The CAS number of HEDP (1-hydroxyethylidene-1,1-diphosphonic acid) is 2809-21-4.
What is the chloride content of ZEELCHEM™ 101?
Chloride is controlled to 0.02 % maximum, which suits textile, electroplating and stainless-steel applications.
Do you supply HEDP across India?
Yes. ZEEL PRODUCT supplies HEDP 60 Pan-India from Vadodara, Gujarat, with TDS, SDS and batch COA documentation.
What is the typical dosage of HEDP 60?
1–10 mg/L (ppm) as product in cooling water; the final dose depends on water analysis. Use the dosing calculator on this page.
What packaging is available?
65.0 kg net HDPE carboy.
What is the price?
Indicative price ₹ 150 per kg (ex-works Vadodara, GST extra), valid until 31-12-2026. Final price depends on quantity and delivery location; call +91-9724593964 for a firm quote.
Do you deliver to my city?
Yes. HEDP 60 is supplied Pan-India by road from Vadodara, Gujarat, to all states including Maharashtra, Tamil Nadu, Telangana, Delhi NCR, West Bengal and Madhya Pradesh.
Who manufactures it?
ZEEL PRODUCT, Vadodara, Gujarat, India — ISO 9001:2015, ISO 22000:2018 and ISO 14001:2015 certified. TDS, SDS and COA supplied.