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Phosphonobutane tricarboxylic acid

CAS Number
37971-36-1
EC Number
253-733-5
Chemical Formula
C7H11O9P
Molecular Weight
270.13 g/mol
Industries:Personal Care & CosmeticsTextile, Leather & PaperBuilding & ConstructionWater Treatment

Description

Phosphonobutane tricarboxylic acid ( CAS 37971-36-1 ), commonly abbreviated as PBTC, is a phosphonate-based organic acid used across water treatment and industrial process chemistry. It functions primarily as a scale inhibitor, corrosion inhibitor, and chelating agent. This chemical is essential for controlling mineral deposits and metal ion activity in aqueous systems. In industrial water treatment, including cooling water circuits and boiler systems, PBTC inhibits calcium carbonate and calcium sulfate scale formation. It is also effective against calcium phosphate scale at low dosage rates. Its chelating capacity makes it effective in textile processing, where it sequesters hardness ions during dyeing and bleaching to prevent interference with colorants. In construction chemical formulations, PBTC acts as a retarder and dispersant in cement and gypsum-based systems. This improves workability and set control, while personal care formulators use it to stabilize products against metal-induced degradation. The compound is also utilized to buffer pH in aqueous product systems across various manufacturing sectors. PBTC is supplied as an aqueous solution, most commonly at fifty percent active content for industrial applications. Technical grade is the standard market offering, with purity and concentration verified by titration or ICP methods. Bulk liquid supply in IBC containers or tankers is typical for industrial procurement volumes and logistics. Contact us for supply of Phosphonobutane tricarboxylic acid Request Quote

Other Names (Synonyms)

2-PHOSPHONOBUTANE-1,2,4-TRICARBOXYLIC ACID | 2-Phosphono-1,2,4-butanetricarboxylic acid | 1,2,4-Butanetricarboxylic acid, 2-phosphono- | BAYHIBIT AM | 306P37319L | PBTA | PBTC tricarboxylic acid | 1,2,4-Tricarboxy-sec-butylphosphonic acid | PBTC

Key Technical Features

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

Physical Properties

Melting Point-15 °C
Boiling Point545.2±60.0 °C(Predicted)
Density1.25 (50% aq.)
ColorColorless to Light yellow
Formclear liquid
Water Solubility909g/L at 20℃
Vapor Pressure0Pa at 25℃
Refractive Index1.579
Log P-1.66 at 25℃

Safety & Handling

Danger
GHS05· CorrosiveGHS07· Irritant

Hazard Statements

H290May be corrosive to metals
H314Causes severe skin burns and eye damage
H319Causes serious eye irritation

Precautionary Statements

P234Keep only in original packaging.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P316Get emergency medical help immediately.
P321Specific treatment (see … on this label).
P363Wash contaminated clothing before reuse.
P390Absorb spillage to prevent material damage.
P405Store locked up.
P406Store in a corrosion-resistant/… container with a resistant inner liner.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
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.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code2931.90.9051
UN Number3265