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Tetrasodium etidronate

CAS Number
3794-83-0
EC Number
223-267-7
Chemical Formula
C2H8O7P2.4Na
Molecular Weight
293.96 g/mol

Description

Tetrasodium etidronate (CAS 3794-83-0 ), also marketed as Turpinal 4NL and Sequion 10Na4 and abbreviated HEDP·4Na, is the fully neutralized tetrasodium salt of 1-hydroxyethylidene-1,1-diphosphonic acid. It functions as a high-performance chelating and sequestering agent, binding calcium, magnesium, and heavy metal ions to prevent scale formation, oxidative degradation, and corrosion across industrial applications. In personal care formulations, it stabilizes hydrogen peroxide in hair bleaching and coloring products, extending shelf life and preventing premature decomposition during storage and use. Water treatment operations use it to inhibit scale deposition and corrosion in cooling towers, boilers, and process water circuits. This ensures operational efficiency and longevity of the equipment. Textile and paper processing facilities apply it to sequester hardness ions during bleaching and dyeing, preventing metal-catalyzed fiber damage and improving overall process consistency and quality. In oil and gas production, it controls mineral scale in pipelines and injection systems where calcium carbonate and phosphate deposits restrict flow. This helps maintain optimal production rates. The product is supplied as a clear to pale yellow aqueous solution, typically at 35–40% active content. Technical and industrial grades are the standard market offering for most applications. Cosmetic-grade material is available to meet personal care formulation requirements. Packaging ranges from drums to IBC containers depending on specific volume requirements and logistics needs. Contact us for supply of Tetrasodium etidronate Request Quote

Other Names (Synonyms)

Tarpinel 4NL | Turpinal 4NL | Sequion 10Na4 | etidronate tetrasodium | Defloc EN 43 | Dequest 2016 | Phosphonic acid, P,P′-(1-hydroxyethylidene)bis-, sodium salt (1:4) | Phosphonic acid, (1-hydroxyethylidene)di-, tetrasodium salt | HEDP·4Na

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Density2.074[at 20℃]
ColorWhite to Off-White
FormSolid
Water Solubility774g/L at 20℃
Vapor Pressure0Pa at 25℃
Log P-3 at 23℃

Safety & Handling

Warning
GHS07· IrritantGHS05· Corrosive

Hazard Statements

H302Harmful if swallowed
H318Causes serious eye damage
H319Causes serious eye irritation
H413May cause long lasting harmful effects to aquatic life

Precautionary Statements

P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P317Get emergency medical help.
P330Rinse mouth.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.