2-Phosphonobutane-1,2,4-tricarboxylic acid CAS 37971-36-1 (5)

2-Phosphonobutane-1,2,4-tricarboxylic acid CAS 37971-36-1 - Image 2

2-Phosphonobutane-1,2,4-tricarboxylic acid CAS 37971-36-1 - Image 3

2-Phosphonobutane-1,2,4-tricarboxylic acid CAS 37971-36-1 - Image 4

2-Phosphonobutane-1,2,4-tricarboxylic acid CAS 37971-36-1

CAS： 37971-36-1
Purity：50%
Molecular Formula：C7H11O9P
Molecular Weight：270.13
EINECS：253-733-5
Período de armazenamento：2 ano
Synonym：
2-PHOSOPHONOBUTANE-1,2,4-TRICARBOXYLICACID; 2-PHOSPHONOBUTANE-1,2,4-TRICARBOXYLICACID; 2-PHOSPHOBUTANE-1,2,4-TRICARBOXYLICACID; 2,4Chemicalbook-Butanetricarboxylicacid,2-phosphono-1; PBTC; PBTCA; 2-phosphono-1,2,4-butanetricarboxylic; 2-Phosphono-1,2,4-butanetricarboxylicacid.

What is 2-Phosphonobutane-1,2,4-tricarboxylic acid?

2-Phosphonobutane-1,2,4-tricarboxylic acid (PBTC) CAS 37971-36-1 is a highly efficient scale and corrosion inhibitor widely used in industrial water treatment systems. With excellent calcium‐tolerance, thermal stability, and chemical compatibility, PBTC performs strongly under high temperature, high hardness, and alkaline conditions, making it a preferred phosphonate additive for modern water treatment applications.

Especificação

ITEM	PADRÃO
Active acid, %	50.0 min
Phosphorous acid (as PO₃^3-)	0.5 max.
Phosphoric acid (as PO₄^3-) %	0.2 max.
Density (20℃), g/cm3	1.27 min
pH (1% water solution)	1.5-2.0
Fe, mg/L	10.0 max
Chloride (as Cl^– ), %	10.0 max

Aplicações

1. Industrial Circulating Cooling Water Systems

PBTC (CAS 37971-36-1) is widely used as a scale and corrosion inhibitor in open recirculating cooling systems across industries such as steel mills, power plants, petrochemical facilities, and metallurgy. It effectively prevents the formation of calcium carbonate, calcium sulfate, and calcium phosphate deposits inside heat exchangers and pipelines. By forming a protective film, PBTC also helps inhibit metal corrosion on carbon steel, copper, and copper alloy surfaces, improving heat exchange efficiency and extending equipment life.

2. Oilfield Water Injection and Production Systems

In oilfield operations, PBTC serves as an antiscalant and corrosion inhibitor in water injection pipelines and wellbore systems. It controls the precipitation of calcium carbonate and barium sulfate, preventing pore plugging in reservoir formations. By reducing corrosion in water injection equipment, PBTC helps maintain stable injection pressure and enhances oil recovery efficiency in harsh oilfield environments.

3. Boiler Water Treatment

PBTC is suitable for medium- and low-pressure boiler water treatment, where it prevents scale accumulation inside boilers and steam-water pipelines. Continuous use helps reduce hardness-related fouling, maintaining boiler heat transfer efficiency and reducing maintenance downtime, which contributes to extended boiler service life and stable steam output.

4. Metal Surface Cleaning and Pretreatment

PBTC is used as a chelating and dispersing additive in metal surface cleaning agents. It effectively removes rust and inorganic scale from metal surfaces while improving detergency. After cleaning, PBTC forms a temporary protective passivation film, preventing flash rusting and ensuring better substrate protection prior to coating, galvanizing, or painting processes.

5. Reverse Osmosis (RO) and Desalination Systems

In RO membrane systems and seawater desalination plants, PBTC functions as an RO antiscalant. It inhibits mineral scale deposition on membranes, protects membrane surfaces, and maintains high permeate flux. When used together with polymeric dispersants, PBTC significantly extends membrane lifespan, lowers operating cost, and ensures stable desalination performance.

2-Phosphonobutane-1,2,4-tricarboxylic_acid_CAS_37971-36-1_application

Key Features & Performance Advantages

1. Multi-Functional Water Treatment Performance

PBTC delivers chelation, scale inhibition, and corrosion inhibition in one product, eliminating the need to dose separate chelating agents, scale inhibitors, and corrosion inhibitors. This multifunctional capability simplifies water treatment formulations, reduces chemical consumption, and helps lower overall operational cost in industrial water systems.

2. Outstanding High-Temperature Stability

Compared with conventional phosphonate scale inhibitors, PBTC shows excellent thermal resistance and maintains stability at temperatures above 150°C without hydrolysis or decomposition. It is ideal for high-temperature circulating cooling water, steam turbine cooling systems, and boiler feed water, ensuring long-lasting protection in demanding industrial environments.

3. Superior Oxidation Resistance

PBTC exhibits strong resistance to oxidation and remains active even in the presence of chlorine, ozone, and other oxidizing biocides. While traditional organic phosphonates are prone to oxidation and performance loss, PBTC maintains reliable scale and corrosion control, making it suitable for systems that require frequent oxidizing disinfection or chlorination.

4. Excellent Compatibility with Other Chemicals

PBTC is highly compatible with polycarboxylate dispersants, zinc salts, molybdate salts, and other water treatment additives, showing no antagonistic effects. When formulated together, PBTC enhances overall system efficiency, improving anti-scaling, anti-corrosion, and dispersing performance for industrial cooling and RO water treatment programs.