2-Hydroxy Phosphonoacetic Acid

2-Hydroxy Phosphonoacetic Acid - Names and Identifiers

Name	2-Hydroxyphosphonoacetic Acid
Synonyms	HPA HPAA hpaa hexylphosphonate hexylphosphonic acid LABOTEST-BB LT00408920 N-HEXYLPHOSPHONIC ACID hydroxyphosphono-aceticaci HYDROXYPHOSPHONEACETICACID Hydroxyphosphono-acetic acid 2-Hydroxyphosphonoacetic Acid 2-HYDROXY PHOSPHONOACETIC ACID Acetic acid, hydroxyphosphono- 2-Hydroxy Phosphonoacetic Acid 2-Hydroxyphosphonocarboxylic Acid 2-Hydroxy Phosphonoacetic Acid (HPA) 2-Hydroxy Phosphonic Acetic AcidStructure
CAS	23783-26-8 4721-24-8
EINECS	405-710-8
InChI	InChI=1/C6H15O3P/c1-2-3-4-5-6-10(7,8)9/h2-6H2,1H3,(H2,7,8,9)/p-2

2-Hydroxy Phosphonoacetic Acid - Physico-chemical Properties

Molecular Formula	C2H5O6P
Molar Mass	156.03
Density	1.37 (50% aq.)
Boling Point	557.7±60.0 °C(Predicted)
Flash Point	135°C
Vapor Presure	0.000278mmHg at 25°C
pKa	2.05±0.10(Predicted)
Storage Condition	-20°C
Physical and Chemical Properties	Density 1.37 (50% aq.)
Use	Widely used in steel, petrochemical, electric power, pharmaceutical and other industries of circulating cooling water system scale inhibition, corrosion inhibition, suitable for low hardness water quality in southern China; HPAA can be widely used in steel, petrochemical, electric power, the scale inhibition and corrosion inhibition of circulating cooling water system in medicine and other industries are generally compounded with zinc salt to form corrosion inhibitor, which is suitable for low hardness water quality in Southern China and has scale inhibition effect.

2-Hydroxy Phosphonoacetic Acid - Risk and Safety

Hazard Symbols	C - Corrosive
Risk Codes	R22 - Harmful if swallowed R34 - Causes burns R43 - May cause sensitization by skin contact R48/22 - Harmful danger of serious damage to health by prolonged exposure if swallowed.
Safety Description	S1/2 - Keep locked up and out of the reach of children. S22 - Do not breathe dust. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
UN IDs	UN 3265
Hazard Class	8
Packing Group	II

2-Hydroxy Phosphonoacetic Acid - Upstream Downstream Industry

Raw Materials

Phosphorous acid
Glyoxylic acid

2-Hydroxy Phosphonoacetic Acid - Nature

Open Data Verified Data

white crystals with a phosphorus content of 19.8% and a melting point of 165-167.5 °c. The pH value of 1% aqueous solution is 1, which can be miscible with water in any proportion.

Last Update：2025-06-10 22:55:16

2-Hydroxy Phosphonoacetic Acid - Application

Open Data Verified Data

used as corrosion inhibitor. HPAA has excellent corrosion inhibition performance, especially for low hardness, low alkalinity, strong corrosive water, showing a strong corrosion inhibition. HPAA has a good chelating effect with divalent ions, which can be used as a metal ion stabilizer to effectively stabilize Fe2, Fe3, Mn2 and Al3 plasma in water and reduce corrosion and scaling; HPAA can significantly reduce the deposition of calcium carbonate and silicon dioxide, and has good scale inhibition performance, but the scale inhibition performance of HPAA on calcium sulfate scale is slightly poor. In order to avoid the decomposition of HPAA by the oxidizing bactericide, the protective agent can be used, but the residual chlorine (0.5~1-0 mg/L) is less affected in the intermittent chlorination cooling water system. The combination of HPAA and zinc salt has obvious synergistic corrosion inhibition effect. The recommended concentration is generally 5 to 30mg/L. Acid corrosion resistance shall be provided for each medicine.

Last Update：2025-08-19 16:24:40

2-Hydroxy Phosphonoacetic Acid - Safety

Open Data Verified Data

rat oral LD50: 2700mg/kg. Corrosive, the staff should be protected to avoid swallowing or contact with the body. The workplace should be well ventilated. If contact with the skin, eyes, immediately rinse with plenty of water. This product is difficult to be biodegraded, and attention should be paid to the influence on water body. Store in a cool and ventilated place to avoid direct sunlight exposure. It cannot be co-stored and co-transported with strong alkali, nitrite or sulfite. During long-term storage, the pressure should be periodically released due to the release of carbon dioxide from impurities contained therein.

Last Update：2022-01-01 09:30:08

2-Hydroxy Phosphonoacetic Acid - Reference Information

EPA chemical information	Information provided by: ofmpub.epa.gov (external link)
properties	HPAA has good chemical stability, is not easy to hydrolyze, is not easy to be damaged by acid and alkali, is safe and reliable to use, is non-toxic and pollution-free, can improve the solubility of zinc, has strong corrosion inhibition effect, and its corrosion inhibition performance is 5-8 times higher than HEDP and EDTMP. The organic corrosion and scale inhibitor composed of low molecular weight polymers has excellent performance.
use	2 hydroxyphosphonoacetic acid is mainly used as a cathode corrosion inhibitor for metals, and is widely used in circulating cooling water systems in iron and steel, petrochemical, electric power, medicine and other industries. it is suitable to be used as a corrosion inhibitor for low hardness and easy to corrode water quality in southern China, and has better compound effect with zinc salt. It is widely used in the scale and corrosion inhibition of circulating cooling water systems in steel, petrochemical, electric power, medicine and other industries, and is suitable for low-hardness water quality in southern my country; HPAA can be widely used in steel, petrochemical, electric power, medicine and other industries The scale and corrosion inhibition of the circulating cooling water system is generally compounded with zinc salt to form a corrosion inhibitor, which is suitable for low-hardness water quality in southern my country and has a scale inhibition effect.

Last Update：2024-04-09 19:05:11

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2-Hydroxy Phosphonoacetic Acid

2-Hydroxyphosphonoacetic Acid

CAS: 23783-26-8;4721-24-8

Molecular Formula: C2H5O6P

2-Hydroxy Phosphonoacetic Acid - Names and Identifiers

2-Hydroxy Phosphonoacetic Acid - Physico-chemical Properties

2-Hydroxy Phosphonoacetic Acid - Risk and Safety

2-Hydroxy Phosphonoacetic Acid - Upstream Downstream Industry

2-Hydroxy Phosphonoacetic Acid - Nature

Open Data Verified Data

2-Hydroxy Phosphonoacetic Acid - Application

Open Data Verified Data

2-Hydroxy Phosphonoacetic Acid - Safety

Open Data Verified Data

2-Hydroxy Phosphonoacetic Acid - Reference Information

Supplier List

2-Hydroxy Phosphonoacetic Acid Request for Quotation

2-Hydroxyphosphonoacetic Acid

CAS: 23783-26-8;4721-24-8

Molecular Formula: C2H5O6P

2-Hydroxy Phosphonoacetic Acid - Names and Identifiers

2-Hydroxy Phosphonoacetic Acid - Physico-chemical Properties

2-Hydroxy Phosphonoacetic Acid - Risk and Safety

2-Hydroxy Phosphonoacetic Acid - Upstream Downstream Industry

2-Hydroxy Phosphonoacetic Acid - Nature

Open Data Verified Data

2-Hydroxy Phosphonoacetic Acid - Application

Open Data Verified Data

2-Hydroxy Phosphonoacetic Acid - Safety

Open Data Verified Data

2-Hydroxy Phosphonoacetic Acid - Reference Information

Supplier List

2-Hydroxy Phosphonoacetic Acid