Appearance:
- Ammonium biurate crystals are yellowish-brown and can be seen in a “thorn apple” shape (round with thorny projections) or in spherical form.
Chemical properties:
- pH of urine: Alkaline
- Soluble in: Acetic acid
- Insoluble in: Ammonium hydroxide
– Clinical Significance: Ammonium biruate crystals can be seen in normal urine.
– However, the presence of ammonium biurate crystals usually indicates an old or poorly preserved specimen.
Ammonium biurate crystals in Alkaline Urine
Ammonium Biurate Crystals
Ammonium biurate crystals
