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Imidazolidinyl urea USP32
?
Incl adopted name: Imidazolidinyl urea
USP/NF Designation:Imidurea,NF
CAS REGISTRY NO: 39236-46-9
Molecular formula: C11H16N8
Molecular weight: 388.30

?Physical Characteristics
(Not Necessarily Specifications)
Color: White
Odor: None or characteristically mild
Appearance: Fine, free flowing powder
Nitrogen: 26.0-28.0%
pH:6.0-7.5(1% aqueous solution)
Loss on drying: 3.0% maximum
Residue on Ignition: 3.0% maximum
Heavy Metals:10 ppm maximum

Imidazolidinyl urea is a white, free-flowing hygroscopic powder that is very soluble in water. It is compatible with essentially all cosmetic ingredients, including surfactants, proteins, and other special ingredients.
Imidazolidinyl urea is very effective against Gram-negative bacteria, including Pseudomonas aeruginosa.
Imidazolidinyl urea acts synergistically with other preservatives. With the parabens it provides a broad spectrum of activity against bacteria, yeast and mold. This synergistic activity has made the IMIDAZOLIDINYL UREA paraben combination one of the most widely used cosmetic preservative systems in the world.