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Hydroxypropyl Methyl Cellulose (HPMC)

Nitric Acid - Clear Liquid Chemical

Nitric Acid

HEDP 98%

Other Trading Names:

  • Dequest 2010
  • Briquest 301-50A
  • Belclene 200
  • Etidronic Acid
  • 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid

CAS Number: 2809-21-4 1

HS Code: 29420090

Types of Packaging:

Drums (Plastic or Steel):

  • Plastic: 30-220 liters, weight capacity varies.
  • Steel (55-gallon): Up to 450 kg.
  • IBC Totes:
    • 1000 liters, holds around 1000 kg.
  • Jerry Cans:
    • 5-20 liters, holds up to 20 kg.
  • Pails:
    • 5-20 liters, holds up to 20 kg.
Inquiry right-arrow $100.00
Availability: In stock
HEDP 98%

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Colorless or light yellow Transparent Liquid

White Crystal powder

Active Content (HEDP) %


90.0 min

Phosphorous acid (as PO3)%

2.0 max

0.5 max

Phosphoric acid (asPO4)%

0.8 max

0.5 max

Chloride (as CI-)%

0.01 max

0.01 max

pH (1 Solution)

2 max

2 max

Density (20g)g/cm3



Fe ion ppm

10 max

20 max

Colour APHA (Hazen)

40 max


Chemical Description 

Chemical Nature and Features:

  • Comprises a phosphonic acid group, which is central to its chelating abilities.
  • Appears typically as a colorless to pale yellow liquid or crystals in its purest form.
  • Odorless or has a faint, characteristic odor not usually detectable by non-industrial sensors.

Industrial Usage and Importance:

  • Actively prevents scale formation and corrosion in water systems, enhancing longevity and efficiency.
  • Operates as a chelating agent by binding to metal ions, thus inhibiting deposit formation.

Synthesis and Processing:

  • Synthesized via a chemical reaction involving phosphorous acid and acetic acid in the presence of a catalyst.
  • Production demands rigorous control conditions and adherence to safety standards due to its corrosive nature.

Applications in Various Sectors:

  • Integral in maintaining the balance of water chemistry in industrial, municipal, and domestic water treatment facilities.
  • Plays a pivotal role in the detergent industry to protect machinery and enhance cleaning efficacy.
  • In the textile and paper industries, it is used to manage mineral deposits and improve product quality.

Health and Safety Considerations:

  • Known as a mildly hazardous substance with specific handling requirements to avoid skin and eye contact.
  • Exposure guidelines and proper handling procedures are outlined in material safety data sheets (MSDS).

Environmental Aspects:

  • Regarded as relatively biodegradable compared to other phosphonates, reducing its environmental footprint.
  • Handled with care to prevent undue soil and aquatic contamination.

In Conclusion:

  • HEDP 98% stands as a vital agent in water treatment and maintenance, owing to its superior chelating properties.
  • Its comprehensive application across multiple industries denotes its indispensable role in modern manufacturing and maintenance.
  • With careful management, HEDP 98% can be utilized effectively while minimizing health risks and environmental impact.
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HEDP 98%