1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP, ZF111)

No.: WTP-029

GENERAL INFORMATION

• HS CODE	29299030
• CAS NO	2809-21-4
• GRADE	Technical Grade
• FORMULA	C₂H₈O₇P₂
• MOLECULAR WEIGHT	206.02

PROPERTIES

• Appearance	Colorless or light yellow crystal liquid
• pH(1% aqueous solution)	≤ 2
• Density(20℃ g/cm³)	≥1.34
• Stability	Stable

SPECIFICATIONS

• Active ingredient(as HEDP)%	≥50.0
• Phosphorous (as PO₃^3-)%	≤2.0
• Phosphoric acid(as PO₄^3-)%	≤0.8
• Chloride(as Cl^-) %	≤1.0
• Ca Chelating value ,mg/g	≥450
• Fe ion , ppm	≤10

APPLICATION

• This product is widely used in circulating cool water system, oil field water pipelines and boilers for antiscale corrosion inhibition in fields such as electric power, chemical industry, metallurgy, fertilizer, etc. In light weave industry, this product is used as detergent for metal and nonmetal. In dyeing industry, this product is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, this product is used as chelating agent. The dosage of 1-10mg/L is preferred as antiscale corrosion inhibitor, 10-50mg/L as corrosion inhibitor, and 1000-2000mg/L as detergent. Usually, this product is used together with antiscale dispersant of polycarboxylic acid type.

PACKING

• Pack in plastic drum，30kg in plastic barrel, or 250L in plastic barrel for export, 200kg or 250kg per barrel, or confirmed by clients.

STORAGE AND TRANSPORTATION

• Store in cool and dry place, the storage period is ten months.

• It is acidic, avoid contacting with eyes and skin, once contacted, flush with water.