1-Hydroxyethylidene-1,1- Diphosphonic Acid HEDP Etidronic acid CAS 2809-21-4 is a chelating agent and may be added to bind or, to some extent, counter the effects of substances, such as calcium, iron or other metal ions, which may be discharged as a component of grey wastewater and could conceivably contaminate groundwater supplies. As a phosphonate it has corrosion inhibiting properties on unnalloyed steel. Etidronic acid also acts to retard rancidification and oxidation of fatty acids.
Specification
| Appearance | Clear, Colorless 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 (20ºC)g/cm3 | 1.40 min | - |
Application
1.HEDP is used as scale and corrosion inhibition in circulating cool water system, oil field and low-pressure boilers in fields such as electric power, chemical industry, metallurgy, fertilizer, etc..
2.In light woven industry, HEDP is used as detergent for metal and nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP is used as chelating agent.
3.The dosage of 1-10mg/L is preferred as scale inhibitor, 10-50mg/L as corrosion inhibitor, and 1000-2000mg/L as detergent. Usually, HEDP is used together with polycarboxylic acid.
Package
25kg bag or 250kg drum.
25mt/1FCL or 20mt/1FCLStorage & Transport
Stored in cool and airy place; away from fire and heat;handle with care;no breakage,avoid leakage
This is classified as a Common Good for transport.About us
Hefei TNJ Chemical Industry Co., Ltd., established in 2001, is a key chemical manufacturer and supplier in China.
In 2001, three young chemists from a local large state-owned chemical factory established TNJ Chemical by starting from producing PVP products. By taking advantage of technology innovation, TNJ made fast and steady development in PVP. Meanwhile, in order to further enhance comprehensive competence, TNJ begun to seek for products diversity and invested more chemical lines to meet market demands. Up to 2015, TNJ owns key products of more than 60 which covers four fields: Chemicals, Food, Pharmaceutical and Personal care.
Through over 15 years of development, TNJ has become an international and diversified modern chemical company. About 60% of our products are exported to overseas which turns over about 20 Million US dollars per year. In 2015, TNJ was awarded as the top 10 exporting giants in Anhui province.
TNJ always adheres to harmonious development. Beyond the economic success, TNJ focuses on environmental protection and social development. In TNJ, all aspects strictly comply with environmental protection standard and regulation set by State Environmental Protection Department of China. As a responsible company, TNJ contributes to social development by producing high-quality assured chemicals and creating more and more jobs. TNJ is also committed to charity annually including supporting students from poor families to continue education etc.
We believe in Better Chemicals, Better Future. We are on the way to become a responsible world-class chemical company through innovation and stable development.
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