Urinary creatinine levels are commonly used as an index of standardization for a variety of other tests. Measurement of creatinine clearance is also useful in detecting renal disease and estimating the extent of impairment of renal function. The Cayman Chemical Creatinine (urinary) Colorimetric Assay Kit has the following features: 96-well plate format, validated for urine samples, sample dependent success in plasma, colorimetric detection at 500 nm, all reagents included for 40 samples in duplicate, simple and fast protocol (- 30 minute incubation).