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Organic Acids REACH

Hydroxyphosphonoacetic acid

CAS Number
23783-26-8
EC Number
231-595-7
Chemical Formula
C2H5O6P
Molecular Weight
156.03 g/mol
Industries:Personal Care & CosmeticsCoatings, Adhesives, Sealants & ElastomersWater Treatment

Description

Hydroxyphosphonoacetic acid ( CAS 23783-26-8 ), commonly sourced and specified as HPAA, is an organophosphonic acid used across water treatment and industrial formulations as a chelating and scale-inhibiting agent. It binds metal ions and disrupts mineral crystal growth, preventing scale deposition and corrosion in process water systems. In cooling water and boiler systems, HPAA controls calcium carbonate and calcium sulfate. It also manages calcium phosphate scale at low dosage levels, making it a preferred choice for high-hardness water circuits. Formulators incorporate it into corrosion inhibitor blends where both metal chelation and threshold inhibition are required. In coatings and adhesive formulations, it functions as a dispersant and adhesion promoter, improving pigment stability and substrate bonding on metal surfaces. This versatility makes it essential for industrial manufacturing. Personal care manufacturers use it as a chelating preservative booster, sequestering trace metals that would otherwise degrade product stability or reduce biocide efficacy. It ensures long-term shelf life and performance. HPAA is supplied as an aqueous solution, with 50% active content being the most commonly traded concentration. Technical grade is the standard specification for industrial water treatment and coating applications. Food-contact and personal care applications typically require documentation confirming purity and absence of heavy metal contaminants. Reputable suppliers provide these alongside standard TDS and COA documents. Contact us for supply of Hydroxyphosphonoacetic acid Request Quote

Other Names (Synonyms)

HPAA | 2-Hydroxy phosphono acetic acid | HPA | Acetic acid, 2-hydroxy-2-phosphono- | Belclene 575 | RefChem:147249 | Acetic acid, hydroxyphosphono

Key Technical Features

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

Physical Properties

Boiling Point557.7±60.0 °C(Predicted)
Density1.37 (50% aq.)
ColorBrown to Dark Brown
FormOil

Safety & Handling

Danger
GHS05· CorrosiveGHS07· IrritantGHS08· Health Hazard

Hazard Statements

H302Harmful if swallowed
H314Causes severe skin burns and eye damage
H317May cause an allergic skin reaction
H318Causes serious eye damage
H373May causes damage to organs through prolonged or repeated exposure

Precautionary Statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P272Contaminated work clothing should not be allowed out of the workplace.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P363Wash contaminated clothing before reuse.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P317Get emergency medical help.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P317Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.
P331Rinse mouth. Do NOT induce vomiting.
P354IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

UN Number3265