Caffeine (PE)

May be stored at 4 degree C before opening. DO NOT FREEZE! Stable at 4 degree C as an undiluted liquid. Dilute only prior to immediate use. Stable for 12 months after receipt at 4 degree C. Freezing R-Phycoerythrin (PE) conjugates will result in a substantial loss of activity. PE conjugates are sensitive to light.

Recognizes Caffeine. Crossreactivity: Caffeine: 100%; Xanthine: <0.05% Theophylline: 11.4%; Uric Acid: <0.05% Theobromine: 2.1%; 1-Methyluric Acid: <0.05% 3-Methylxanthine: 0.4%; 8-Methylxanthine: <0.05% 1, 7-Dimethylxanthine: 0.3%; 7-Methylxanthine: <0.05% 8-Chlorotheophylline: 0.3%; 1-Methylxanthine: <0.05%