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HEDP (1-Hydroxyethylidene-1,1-diphosphonic acid) Cas no 2809-21-4 is widely used in industry as a sequestering agent and calcium carbonate scale inhibitor for applications in cooling water treatment, boiler water treatment, industrial and institutional cleaners, swimming pool stain prevention, personal care products, metal ion control.
Besides these applications, HEDP can also be used as cleaning agent of metal and nonmetal in the textile industry, as peroxide stabilizer and fixing agent in bleaching and dyeing industry, as complexing agent in cyanide free electroplating industry, as the carrier of radioactive elements in pharmaceutical industry, and so on.
| Items | Index | |
| Appearance | Clear, Colorless to pale yellow aqueous solution | White crystal powder |
| Active content (HEDP)% | 60.0 min | 90.0 min |
| Active content (HEDP·H2O)% | – | 98.0 min |
| Phosphorous acid (as PO33-)% | 1.0 max | 0.8 max |
| Phosphoric acid (as PO43- )% | 0.6 max | 0.5 max |
| Chloride (as Cl–)% | 0.01 max | 0.01 max |
| pH (1% water solution) | 2.0 max | 2.0 max |
| Density (20℃)g/cm3 | 1.40 min | – |
| Fe, mg/L | 10.0 max | 5.0 max |
| Colour APHA (Hazen) | 10.0 max | – |
| Ca sequestration (mg CaCO3/g) | 500.0 min | – |
1、When will my goods be shipped?
-- About 3〜5 days after prepayment is paid.
2、Can I get a sample?
-- Free samples are available, but buyers needs to pay freight.
3、How long does it take for me to get a sample?
-- It depends. Generally speaking, it is about 7-10 days.
4、Why is the quote offered different from the sticker price?
-- As we know, prices of chemicals are not fixed, they fluctuate with the markets.
5、Is the quality of your products guaranteed?
-- We have a professional R&D team, so every batch of our products is up to standard.
1. With a seasoned R&D team, we are experienced in producing multiple chemicals over the past ten years.
2. Tailor-made packing can also be available according to your specific requirment.
3. Fast response. Every inquiry will be answered within 24 hours.
4. Prompt delivery. We have worked with many forwarding companies for years.
5. Good quality, we have a strict quality control system.
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