Products Description of 2-Phosphonobutane-1,2,4-tricarboxylic Acid (PBTC) CAS#37971-36-1
2-Phosphonobutane-1,2,4-tricarboxylic acid (PBTC) is a next-generation phosphine carboxylic acid compound that is widely recognized worldwide. It is one of the most commonly used and high-performance components in the formulation of efficient scale and corrosion inhibitors.
PBTC is particularly suitable for water systems with challenging conditions, including high temperature, high hardness, high alkalinity, high pH, and high concentration ratios. It provides excellent scale inhibition performance, especially for controlling calcium carbonate and calcium phosphate deposits, helping maintain the stability and efficiency of water treatment systems.
2-Phosphonobutane-1,2,4-tricarboxylic acid Chemical Properties
| Melting point | -15 °C |
| Boiling point | 545.2±60.0 °C(Predicted) |
| density | 1.25 (50% aq.) |
| vapor pressure | 0Pa at 25℃ |
| refractive index | 1.579 |
| solubility | Completely miscible in water |
| pka | 1.14±0.10(Predicted) |
| form | clear liquid |
| color | Colorless to Light yellow |
| Water Solubility | 909g/L at 20℃ |
| Cosmetics Ingredients Functions | BUFFERING |
| ANTICORROSIVE | |
| CHELATING | |
| InChI | InChI=1S/C7H11O9P/c8-4(9)1-2-7(6(12)13,3-5(10)11)17(14,15)16/h1-3H2,(H,8,9)(H,10,11)(H,12,13)(H2,14,15,16) |
| InChIKey | SZHQPBJEOCHCKM-UHFFFAOYSA-N |
| SMILES | C(C(O)=O)C(P(O)(O)=O)(C(O)=O)CCC(O)=O |
| LogP | -1.66 at 25℃ |
| CAS DataBase Reference | 37971-36-1(CAS DataBase Reference) |
| EPA Substance Registry System | 2-Phosphono-1,2,4-butanetricarboxylic acid (37971-36-1) |
| Hazard Codes | Xi;Xn,Xn,Xi |
| Risk Statements | 34 |
| Safety Statements | 26-45 |
| RIDADR | UN 3265 |
| TSCA | TSCA listed |
| HS Code | 2931.90.9051 |
| HazardClass | 8 |
| PackingGroup | III |
Product Application of 2-Phosphonobutane-1,2,4-tricarboxylic Acid CAS#37971-36-1
PBTC is widely used as a key component in the formulation of high-efficiency scale and corrosion inhibitors, offering excellent performance among similar products. It also functions as an effective zinc salt stabilizer and is commonly applied in water treatment systems.
It is extensively used for corrosion and scale control in circulating cooling water systems and oilfield water injection systems, particularly in combination with zinc salts and copolymers to enhance treatment performance. In the washing industry, PBTC can also be utilized as a chelating agent and metal cleaning agent.
