PHR1500 Supelco


Pharmaceutical Secondary Standard; Certified Reference Material

Synonym: N,N′′-Methylenebis[N′-[3-(hydroxymethyl)-2,5-dioxo-4-imidazolidinyl]-urea, Imidazolidinyl urea



Related Categories Analytical Standards, Analytical/Chromatography, E-J, Pharmaceutical Secondary Standards, Pharmacopeia & Metrological Institutes Standards More...
Quality Level   300
grade   certified reference material
  pharmaceutical secondary standard
packaging   pkg of 1 g
Featured Industry   Pharmaceutical (small molecule)
format   neat
pharmacopeia traceability   traceable to USP 1336806


General description

Pharmaceutical secondary standards for application in quality control, provide pharma laboratories and manufacturers with a convenient and cost-effective alternative to the preparation of in-house working standards.
Imidurea is an anti-microbial preservative employed in cosmetic as well as pharmaceutical formulations. It is often used in combined dosage forms with paraben for synergistic effects.


Imidurea may be used as a pharmaceutical reference standard for the determination of the analyte in pharmaceutical formulations by chromatography techniques.

These Secondary Standards are qualified as Certified Reference Materials. These are suitable for use in several analytical applications including but not limited to pharma release testing, pharma method development for qualitative and quantitative analyses, food and beverage quality control testing, and other calibration requirements.

Used in:
Biological studies investigating the antibacterial synergistic activity of essential oils and surfactants against P. aeruginosa and S. aureus
Pharmacological studies investigating nutrient-sensitized screening for drugs that shift energy metabolism from mitochondrial respiration to glycolysis
Therapeutic studies involving nanostructured vegetable-based carriers for topical delivery of active molecules
Topical formulas for use as antioxidants
Comparison studies of MEKC and microemulsion electrokinetic chromatography for analytical studies of preservatives
Investigations of in vitro induction of apoptosis versus necrosis by widely used preservatives

Analysis Note

These secondary standards offer multi-traceability to the USP, EP and BP primary standards, where they are available.

Other Notes

This Certified Reference Material (CRM) is produced and certified in accordance with ISO 17034 and ISO/IEC 17025. All information regarding the use of this CRM can be found on the certificate of analysis.


To see an example of a Certificate of Analysis for this material enter LRAA3048 in the slot below. This is an example certificate only and may not be the lot that you receive.

Safety & Documentation

Safety Information

GHS07  GHS07
Signal word 
Hazard statements 
Precautionary statements 
NONH for all modes of transport
WGK Germany 


Certificate of Analysis (COA)

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Protocols & Articles
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