Hydroxyphosphono-acetic acid CAS 23783-26-8 HPAA

HPAA has good chemical stability, is not easy to hydrolyze, is not easily destroyed by acid and alkali, is safe and reliable to use, non-toxic and pollution-free, can increase the solubility of zinc, has a strong corrosion inhibition effect, and the corrosion inhibition performance of HPAA is higher than that of HEDP and EDTMP.

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Model:
23783-26-8
Brand:
futurechemical
Code:
23783-26-8

Product Description

2-Hydroxyphosphonocarboxylic Acid (HPAA)

CAS No. 23783-26-8

Alias:Phosphonohydroxyacetic acid, hydroxyphosphoroacetic acid, hydroxyphosphonoacetic acid, HPA

Molecular formula: C₂H₅O₆P

Relative molecular mass:156

Structural formula:

2-羟基膦酰基乙酸（HPAA）结构式

1. Performance and use:

HPAA is mainly used as a cathode corrosion inhibitor for metals, and is widely used in the corrosion and scale inhibition of circulating cooling water systems in the steel, petrochemical, electric power, and pharmaceutical industries. It is suitable for use as a corrosion inhibitor for low-hardness and easily corrosive water in southern my country.

2. Technical indicators

project	Indicators
Appearance	Dark brown liquid
Solid content /%	≥50.0
Organic phosphine（PO₄³）/%	≥25.0
Phosphoric acid（PO₄³）/%	≤1.5
Phosphorous acid（PO₃³）/%	≤3.0
pH (10g/LAqueous solution)	≤3.0
density（20℃）/g·cm^-3	≥1.30

3. Usage

HPAA and low molecular weight polymers together form an organic corrosion and scale inhibitor with excellent performance. HPAA and zinc salt compounding has a better effect.

4. Packaging and storage

HPAA is packed in plastic barrels, 30kg per barrel. Store in a cool place indoors, the storage period is 12 months.

5. Safety protection

HPAA is an acidic liquid. Pay attention to labor protection when handling it and avoid contact with skin, eyes, etc. Rinse with plenty of water after contact.

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Quality Assurance

Full-Process Quality Control: From incoming raw material inspection to in-process monitoring and final outgoing checks, every batch is inspected at each production stage against strict acceptance standards.
Third-Party Certified & Tested: Our quality management system is certified to ISO 9001, and products are regularly tested by accredited laboratories (e.g. SGS, TÜV). Test reports are available on request.
100% Batch Traceability: Each batch carries a unique lot number that links raw material records, production parameters, and test results, enabling complete traceability from factory to final delivery.
Pre-Shipment Inspection: Every order passes a final pre-shipment inspection, with inspection photos and reports shared before dispatch.

FAQ From Customers

Q1: What is the minimum order quantity?

A: There is no quantity limit for the first sample or trial order. Just tell us the actual quantity you need.
Q2: How can I confirm that the quality meets the requirements?

A: Provide your specifications, and our technical team will check them or customize them for you; we can provide TDS, MSDS, and COA, and accept third-party testing.
Q3: How do you ensure stable quality?

A: We manufacture under an ISO 9001 quality system, test every batch before release, and retain samples for 24 months for traceability.
Q4: Do you provide samples?

A: Yes — Free samples are available; freight is at buyer's expense for express delivery.