Introduction
Only 5% of Green Acid can remove severe calcite scale, gypsum, calcium phosphate and calcium oxalate scales just in few minutes. Green Acid can de-rust any equipments made of any metals because it contains the best biodegradable corrosion inhibitor.
Stop using traditional dirty strong mineral acids like Hydrochloric acid (HCl), Sulfuric acid (H2SO4) or Phosphorus acids. These acids have destroyed the world environments.
Green Acid is a product well suited to every application
because it is very strong which contains scale inhibitors,
corrosion inhibitors including trace color to take the maximum efficiency from its strength, while it’s not corrosive
and safest to handle than any traditional acids in the
market. This acid can de-scale anything! Anything you
just want neat and clean, fast and safe without damaging
future generation’s environment.
Best Features
Low toxicological risk
Does not contribute to eutrophication
100% Biodegradable formulation
Odor free
No gas phase corrosion
Chemically stable
SCALE-OVER™
The Fastest De-scaling Solution
Introduction
Cleaning + Disinfecting Industrial Water Systems including Cooling Water and Boiler Water Systems
SCALE-OVER increases solubility of Calcium phosphate or sulfate. This offers more flexibility to suit any application. Stronger solutions can be used to increase reaction rates without precipitating out salts such as gypsum and apatite. SCALE-OVER can dissolve more scale into solution than any other de-scaler in the world.
Best Features
- • No Phosphates or Phosphonates
- • Disinfect the system from microbial growth
- • 100% Biodegradable formulation
- • Prevents bio-film development
- • No VOC
- • Very Low COD
- • Halogen free
- • Very low toxicity
- • Non-corrosive to metal and galvanized pipes and equipments
Video
FREQUENTLY ASKED
QUESTIONS
Green Acid is Watch Water’s 100 % concentrated, non-oxidizing, biodegradable acid designed for scale and rust removal.
Scale-Over™ is the ready-to-use diluted version (5–10 % active Green Acid) formulated with inhibitors, surfactants, dispersants, and color indicator for direct descaling and cleaning.
They are used across cooling-tower, boiler, heat-exchanger, chiller, mining, beverage, and municipal water-system maintenance — anywhere scale, rust, or bio-film build-up occurs.
Its catalyzed sulfonic-acid structure contains strong anionic groups that break down metal salts, carbonates, and oxides. The acid dissolves the mineral matrix while built-in inhibitors protect the base metal from corrosion.
Because they’re halogen-free, phosphate-free, non-volatile, and 100 % biodegradable, meeting OECD 301 & 306 guidelines. They clean efficiently without harming users, equipment, or the environment.
They are much safer than mineral acids. With low vapor pressure and no toxic gas release, they can be handled safely using gloves and goggles in normal ventilation.
No. Both products are odor-free and do not produce acid fumes or gas-phase corrosion in buildings or enclosed equipment rooms.
No. Both are halogen-free, nitrogen-free, and phosphorus-free, which prevents formation of chlorides, nitrates, or phosphates in wastewater.
Yes. Unlike organic acids such as acetic or formic acid, Green Acid and Scale-Over™ are completely non-flammable and low-VOC.
No. Since they contain no phosphates or nitrogen compounds, they do not promote eutrophication in aquatic ecosystems.
Rinse immediately with plenty of water. The acids are less aggressive than mineral acids, but direct contact should be avoided as with all cleaning agents.
Yes. After neutralization (pH 6–7) or color change to yellow, Scale-Over™ can be safely discharged into wastewater systems in compliance with environmental regulations.
Its optimized blend of Green Acid (20 %), dispersants, wetting agents, and corrosion inhibitors allows rapid penetration of deposits and instant dissolution without metal damage.
The solution starts light red and turns yellow once spent — a built-in indicator that signals the end of its activity, preventing overuse or waste.
Approximately 0.5 kg of scale per liter of concentrated Scale-Over™ (or 2 kg per 4 L). Performance may vary with temperature and type of deposit.
Depending on scale thickness, a few minutes to several hours. Even long contact periods cause zero corrosion due to the inhibitor package.
Yes. If the color remains red after use, the solution still contains active acid and can be reused for additional cleaning cycles.
Yes. They can clean and disinfect on-line or off-line systems, including circulating water in boilers and cooling loops without system disassembly.
Yes. Both are oxidant-resistant and can be safely combined with hydrogen peroxide for bio-cleaning or surface disinfection.
Yes. The corrosion-inhibitor formulation allows safe cleaning of sensitive alloys, including stainless steel, copper, brass, and aluminum.
Green Acid and Scale-Over™ are equally strong in dissolving scale but 10 × safer: no fumes, no corrosion, no chloride residue, and full biodegradability.
No adverse effects when used as directed. The non-oxidizing formula is gentle on seals and elastomers.
They work effectively at ambient temperature; mild heating (≤ 50 °C) can further accelerate descaling without increasing corrosion risk.
Yes, both are readily biodegradable into carbon dioxide, water, and biomass per OECD 301 / 306 standards.
They have an ultra-low COD compared with acetic or citric acid, because they resist oxidation and degrade slowly but completely to harmless compounds.
They comply with international Green Chemistry and OECD biodegradability standards and are formulated without restricted substances like EDTA or NTA.
Dilute 100 % Green Acid to 10 % concentration to create Scale-Over™.
For example, mix 1 part Green Acid with 9 parts water. Use corrosion-resistant plastic or stainless vessels for dilution.
Keep in a cool, dry, well-ventilated place, away from sunlight and moisture. Containers must be tightly sealed. Shelf life: two years.
Scale-Over™ is offered in:
- 500 ml bottles (6 per box)
- 3 L canisters (4 per box)
- 10 L, 30 L canisters, or 1000 L IBCs
Green Acid is available in bulk drums or IBCs for industrial users and formulators.
Drinking Water Treatment