Chelating Agents
REACH
Phosphonomethyliminodiacetic acid
CAS Number
5994-61-6
EC Number
227-824-5
Abbreviation
PMIDA
What is Phosphonomethyliminodiacetic acid?
Phosphonomethyliminodiacetic acid (CAS 5994-61-6), abbreviated PMIDA, is a phosphonate-based chelating agent.
Where is Phosphonomethyliminodiacetic acid used?
- Water treatment: corrosion and scale inhibitor blends for cooling towers, boilers and oilfield injection systems
- Agrochemical manufacturing: direct precursor to glyphosate
- Textile and paper processing: sequesters calcium and magnesium ions during bleaching and dyeing
- Oil and gas: controls mineral scale deposition in pipelines and production equipment
- It sequesters metal ions and inhibits scale and corrosion in process systems.
Commercial specifications
- Technical grade, purity typically 98% or higher for agrochemical intermediate use
- Bulk packaging: multi-layer bags to IBC containers
Other Names (Synonyms)
n-(carboxymethyl)-n-(phosphonomethyl)glycine|2-[carboxymethyl(phosphonomethyl)amino]acetic acid|n-(phosphonomethyl)iminodiacetic acid|PMIDA
What are the physical properties of Phosphonomethyliminodiacetic acid?
Melting Point 210 °C
Boiling Point 585.9±60.0 °C(Predicted)
Density 1.792±0.06 g/cm3(Predicted)
Appearance White to off-white Solid
Form Crystalline
Vapor Pressure 0Pa at 45℃
How is Phosphonomethyliminodiacetic acid classified and handled safely? Learn More
Danger
GHS05· Corrosive
Hazard Statements
H314 Causes severe skin burns and eye damage
Precautionary Statements
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P316 Get emergency medical help immediately.
Which trade and regulatory codes apply to Phosphonomethyliminodiacetic acid?
UN Number 3261
ADR Class 8
Packing Group III
Storage Class 11 - Combustible Solids
WGK (Germany) 1