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Allantoin
From Wikipedia, the free encyclopedia
| Allantoin | |
| Chemical name (2,5-Dioxo-4-imidazolidinyl) urea |
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| General | |
|---|---|
| Chemical formula | C4H6N4O3 |
| Molecular weight | 158.1164 g/mol |
| Appearance | white crystalline powder |
| CAS number | 97-59-6 |
| MSDS | Allantoin MSDS |
| SMILES | O=C1C(NC(=O)N1)NC(=O)N |
| Other names | |
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| Physical properties | |
| Density and phase at STP | ? g/cm3 (?) |
| Solubility | 0.5% in water (25 °C) 0.2% in alcohol (25 °C ?) |
| Specific gravity | ? |
| Crystal structure | ? |
| pH (10% solution with water) | ? |
| Acidity constant (pKa) | ? |
| Thermal decomposition | ? °C (? K) |
| Phase behavior | |
| Melting point | 239 °C |
| Boiling point | ? °C (? K) |
| Triple point | ? K (? °C) ? bar |
| Critical point | ? K (? °C) ? bar |
| Heat of fusion (ΔfusH) |
? kJ/mol |
| Entropy of fusion (ΔfusS) |
? J/mol·K |
| Heat of vaporization (ΔvapH) |
? kJ/mol |
Allantoin is a botanical extract of the comfrey plant and is used for its healing, soothing, and anti-irritating properties[citation needed]. Allantoin helps to heal wounds and skin irritations and stimulate growth of healthy tissue[citation needed]. This extract can be found in anti-acne products, sun care products, and clarifying lotions because of its ability to help heal minor wounds and promote healthy skin.
Its chemical formula is C4H6N4O3. It is also called 5-ureidohydantoin or glyoxyldiureide. It is a product of oxidation of uric acid. It is a diureide of glyoxylic acid. It is a product of purine metabolism in most mammals except higher apes, and it is present in their urine.[1]
The keratolytic effect and abrasive and astringent properties of allantoin are used in skin softening cosmetic preparations. It is also frequently present in toothpaste, mouthwash, and other oral hygiene products, in shampoos, lipsticks, various cosmetic lotions and creams, and other cosmetic and pharmaceutical products.
- udder cream
- ureidohydantoin
- glyoxyldiureide
- hemocane
- (2,5-dioxo-4-imidazolidinyl)-urea
- 5-ureidohydantoin
- (formerly) Vitamin U
- ^ Young E. G., Wentworth H. P., Hawkins W. W. (1944). "The absorption and excretion of allantoin in mammals". J. Pharmacol. Experi. Therapeutics 81: 1-9.