• 2-Phosphonobutane-1,2,4-Tricarboxylic Acid (PBTC) CAS 37971-36-1

2-Phosphonobutane-1,2,4-Tricarboxylic Acid (PBTC) CAS 37971-36-1

PBTC (2-Phosphonobutane-1,2,4-tricarboxylic acid) is a low-phosphorus organophosphonic acid commonly used in industrial water treatment formulations. It functions primarily as a scale inhibitor and corrosion inhibitor, with good performance in systems operating under high hardness, high alkalinity, and elevated temperature conditions.

It is widely applied in circulating cooling water systems, boiler water treatment, and industrial cleaning formulations where control of calcium carbonate and other inorganic scale is required. PBTC is typically supplied as an aqueous solution for ease of handling and formulation. Standard packaging, bulk supply capability, and supporting documents such as COA, TDS, and SDS are available for industrial procurement.

  • CAS: 37971-36-1
  • Synonyms: PBTC;2-Phosphonobutane-1,2,4-tricarboxylic acid
  • Einecs: 253-733-5
  • Molecular Formula: C7H11O9P
  • Grade: Industrial grade
  • Package: Typically supplied in standard liquid chemical packaging such as drums or IBC containers; packaging can be arranged according to order volume
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Product Description

Physicochemical Properties

AppearanceColorless to light yellow transparent liquid
OdorMild characteristic odor
pH (1% solution)Typically acidic
SolubilityCompletely soluble in water
DensityTypically around 1.2–1.3 g/cm³ (depending on concentration)
Active ContentCommonly supplied as aqueous solution
Thermal StabilityGood stability under elevated temperature conditions
Calcium ToleranceHigh tolerance to calcium ions

Typical Applications

  • Scale inhibitor in circulating cooling water systems
  • Corrosion and scale control in boiler water treatment
  • Component in industrial water treatment formulations
  • Used in cleaning formulations for scale control in industrial equipment

Packaging

PBTC is supplied as a liquid product and is typically packed in sealed plastic drums or intermediate bulk containers (IBC) suitable for industrial chemical transport.

Packaging is designed to maintain product stability and prevent contamination during storage and transportation. Bulk packaging arrangements can be provided according to order volume and logistics requirements.

Storage

Store in a cool, well-ventilated area away from direct sunlight and heat sources. Keep containers tightly closed when not in use to prevent contamination.

Avoid prolonged exposure to air and maintain proper handling conditions to ensure consistent product performance.

FAQ

  • What is the main function of PBTC in water treatment?
    It is mainly used as a scale inhibitor and corrosion inhibitor in industrial water systems.
  • In what form is PBTC supplied?
    It is typically supplied as an aqueous liquid solution.
  • Where is PBTC commonly used?
    It is widely used in cooling water systems, boiler water treatment, and industrial cleaning processes.
  • Does PBTC perform well in high hardness water?
    It is commonly selected for systems with high calcium hardness due to its good calcium tolerance.
  • What documents are available for this product?
    COA, TDS, and SDS are typically available to support industrial use.
  • Can this product be supplied in bulk quantities?
    Bulk supply and packaging arrangements can be provided based on order requirements.

FAQ - Technical & Supply Chain

Documents

Documents and Product Support

For product review and sourcing evaluation, supporting documents can be coordinated according to the product type, inquiry stage, and order requirements.

  • COA for batch-based quality reference
  • TDS for key physical and chemical information
  • SDS / MSDS for handling, storage, and safety reference
  • Packing information for sample, trial, and bulk orders
  • Technical communication based on application and specification requirements
Quotation

Information to Confirm Before Quotation

Clear sourcing information helps reduce specification mismatch and allows a more accurate quotation before sample or bulk order discussion.

  • Product name and CAS number
  • Application or intended end use
  • Required purity, grade, or specification
  • Sample quantity, trial order, or bulk demand
  • Preferred packing form or net weight
  • Destination country or port
  • Required documents or compliance expectations
Storage & Handling

Packaging, Storage, and Handling Notes

Packaging form, storage conditions, shelf life, and shipment arrangements should be confirmed according to the product characteristics, package size, and destination requirements.

Before order confirmation, buyers are advised to review the corresponding product documents and confirm whether any special storage, labeling, or handling requirements apply.

Supply Support

Sample, Bulk Order and Repeat Supply Support

Support can be arranged for sample discussion, bulk supply planning, packaging confirmation, and routine sourcing communication based on the actual product and order requirements.

For repeat-use formulations or long-term procurement plans, buyers may discuss specification consistency, packaging preferences, delivery expectations, and document coordination in advance.

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