| CAS Number | 5994-61-6 |
|---|---|
| Molecular Formula | C5H10NO7P |
| Molecular Weight | 227.109 |
| InChI Key | AZIHIQIVLANVKD-UHFFFAOYSA-N |
| LogP | -4.6 |
| Synonyms |
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Applications:
HPLC UV Method for Analysis of N-(Phosphonomethyl)iminodiacetic acid (PMIDA) on Newcrom BH Column
December 12, 2025
HPLC Method for PMIDA (Phosphonomethyliminodiacetic acid) on Newcrom BH by SIELC Technologies
High Performance Liquid Chromatography (HPLC) Method for Analysis of PMIDA (Phosphonomethyliminodiacetic acid).
N-(Phosphonomethyl)iminodiacetic acid, also known as PMIDA, is a key intermediate in the making of glyphosate. It has the chemical formula (HO)2P(O)CH2N(CH2CO2H)2. You can find detailed UV spectra of PMIDA and information about its various lambda maxima by visiting the following link.
PMIDA (Phosphonomethyliminodiacetic acid) can be retained and analyzed using the Newcrom BH stationary phase column. The analysis utilizes an isocratic method with a simple mobile phase consisting of water and acetonitrile (MeCN) with a phosphoric acid buffer. Detection is performed using UV.
| Column | Newcrom BH, 4.6 x 100 mm, 5 µm, 100 A, dual ended |
| Mobile Phase | MeCN/H2O |
| Buffer | Gradient H3PO4 – 0.5-2.0%, 10 min |
| Flow Rate | 1.0 ml/min |
| Detection | UV, 200 nm |
| LOD* | 6 ppm |
| Class of Compounds | Herbicide |
| Analyzing Compounds | PMIDA (Phosphonomethyliminodiacetic acid) |
Application Column
Newcrom BH
Column Diameter: 4.6 mm
Column Length: 100 mm
Particle Size: 5 µm
Pore Size: 100 A
Column options: dual ended
HPLC UV Method for Simultaneous Analysis of Glyphosate and N-(Phosphonomethyl)iminodiacetic acid (PMIDA) on Newcrom BH Column
December 11, 2025
HPLC Method for PMIDA (Phosphonomethyliminodiacetic acid), Glyphosate on Newcrom BH by SIELC Technologies
High Performance Liquid Chromatography (HPLC) Method for Analysis of PMIDA (Phosphonomethyliminodiacetic acid), Glyphosate.
Glyphosate is a broad-spectrum herbicide. It works through inhibiting the plant enzyme 5-enolpyruvylshikimate-3-phosphate synthase. The enzyme is essential for producing amino acids within the plant. Glyphosate is used across agriculture and forestry, as well as rare aquatic environments. It’s chemical formula is C3H8NO5P. You can find detailed UV spectra of Glyphosate and information about its various lambda maxima by visiting the following link.
N-(Phosphonomethyl)iminodiacetic acid, also known as PMIDA, is a key intermediate in the making of glyphosate. It has the chemical formula (HO)2P(O)CH2N(CH2CO2H)2. You can find detailed UV spectra of PMIDA and information about its various lambda maxima by visiting the following link.
PMIDA (Phosphonomethyliminodiacetic acid), Glyphosate can be retained and analyzed using the Newcrom BH stationary phase column. The analysis utilizes an isocratic method with a simple mobile phase consisting of water and acetonitrile (MeCN) with a phosphoric acid buffer. Detection is performed using UV.
| Column | Newcrom BH, 4.6 x 50 mm, 5 µm, 100 A, dual ended |
| Mobile Phase | MeCN/H2O |
| Buffer | Gradient H3PO4 – 0.1-1%, 10 min |
| Flow Rate | 1.0 ml/min |
| Detection | UV, 200 nm |
| LOD* | 4 ppm |
| Class of Compounds | Herbidices |
| Analyzing Compounds | PMIDA (Phosphonomethyliminodiacetic acid), Glyphosate |
Application Column
Newcrom BH
Column Diameter: 4.6 mm
Column Length: 50 mm
Particle Size: 5 µm
Pore Size: 100 A
Column options: dual ended
PMIDA (Phosphonomethyliminodiacetic acid)
UV-Vis Spectrum of N-(Phosphonomethyl)iminodiacetic acid (PMIDA)
December 11, 2025
If you are looking for optimized HPLC method to analyze PMIDA (Phosphonomethyliminodiacetic acid) check our HPLC Applications library
For optimal results in HPLC analysis, it is recommended to measure absorbance at a wavelength that matches the absorption maximum of the compound(s) being analyzed. The UV spectrum shown can assist in selecting an appropriate wavelength for your analysis. Please note that certain mobile phases and buffers may block wavelengths below 230 nm, rendering absorbance measurement at these wavelengths ineffective. If detection below 230 nm is required, it is recommended to use acetonitrile and water as low UV-transparent mobile phases, with phosphoric acid and its salts, sulfuric acid, and TFA as buffers.
For some compounds, the UV-Vis Spectrum is affected by the pH of the mobile phase. The spectra presented here are measured with an acidic mobile phase that has a pH of 3 or lower.
HPLC Separation of Glyphosate Reaction Intermediates and Impurities
March 3, 2010

Glyphosate and intermediates/impurities of production are separated on an Obelisc N HILIC/ion-exchange column by a combination of HILIC and ion-exchange mechanism. Method can be used in analysis of glyphosate, iminodiacetic acid, (N-phosphonomethyl)-imminodiacetic acid, diethanolamine and related impurities in reaction mixtures, waste and ground waters. Detection techniques are LC/MS, ELSD, CAD and UV.
| Column | Obelisc N, 4.6×150 mm, 5 µm, 100A |
| Mobile Phase | MeCN/H2O |
| Buffer | Ammonium Formate |
| Flow Rate | 1.0 ml/min |
| Detection | ELSD |
| Class of Compounds |
Herbicide, Hydrophilic, Ionizable |
| Analyzing Compounds | Glyphosate, IDA, PMIDA, DEA |
Application Column
Obelisc N
SIELC has developed the Obelisc™ columns, which are mixed-mode and utilize Liquid Separation Cell technology (LiSC™). These cost-effective columns are the first of their kind to be commercially available and can replace multiple HPLC columns, including reversed-phase (RP), AQ-type reversed-phase, polar-embedded group RP columns, normal-phase, cation-exchange, anion-exchange, ion-exclusion, and HILIC (Hydrophilic Interaction Liquid Chromatography) columns. By controlling just three orthogonal method parameters - buffer concentration, buffer pH, and organic modifier concentration - users can adjust the column properties with pinpoint precision to separate complex mixtures.
Select optionsGlyphosate
IDA (Iminodiacetic acid)
PMIDA (Phosphonomethyliminodiacetic acid)
HPLC Separation of Glyphosate Production Intermediates
January 13, 2010

Glyphosate is a broad spectrum herbicide used to kill weeds. It is the most used herbicide. Glyphosate is an aminophosphonic analogue of the natural amino acid glycine. Glyphosate and its intermediates are very polar ionic compounds derived from glycine. Neither of intermediates can be retained on traditional reversed-phase columns. Two methods for glyphosate intermediates were developed on Primesep B, Primesep B2 and Primesep 100 columns.
| Column | Primesep B, Primesep B2, Primesep 100, 4.6×150 mm, 5 µm, 100A |
| Mobile Phase | MeCN/H2O |
| Buffer | TFA, H2SO4 |
| Flow Rate | 1.0 ml/min |
| Detection | ELSD |
| Class of Compounds |
Insecticide, Herbicide, Fungicide, Hydrophobic, Ionizable |
| Analyzing Compounds | Glyphosate, PMIDAA, IDA |
Application Column
Primesep 100
The Primesep family of mixed-mode columns offers a wide variety of stationary phases, boasting unprecedented selectivity in the separation of a broad array of chemical compounds across multiple applications. Corresponding Primesep guard columns, available with all stationary phases, do not require holders. SIELC provides a method development service available to all customers. Inquire about our specially-tailored custom LC-phases for specific separations.
Select optionsPrimesep B
The Primesep family of mixed-mode columns offers a wide variety of stationary phases, boasting unprecedented selectivity in the separation of a broad array of chemical compounds across multiple applications. Corresponding Primesep guard columns, available with all stationary phases, do not require holders. SIELC provides a method development service available to all customers. Inquire about our specially-tailored custom LC-phases for specific separations.
Select optionsPrimesep B2
The Primesep family of mixed-mode columns offers a wide variety of stationary phases, boasting unprecedented selectivity in the separation of a broad array of chemical compounds across multiple applications. Corresponding Primesep guard columns, available with all stationary phases, do not require holders. SIELC provides a method development service available to all customers. Inquire about our specially-tailored custom LC-phases for specific separations.
Select optionsDiethanolamine
Glyphosate
IDA (Iminodiacetic acid)
Iminodiacetic Acid
PMIDA (Phosphonomethyliminodiacetic acid)
Phosphonomethyliminodiacetic Acid
UV Detection







