https://www.selleckchem.com/pr....oducts/sodium-bicarb
The addition of lemon, horizontal orientation of slides and refrigeration each separately led to an improvement in staining characteristics. The addition of 4% acetic acid and refrigeration of the solution each led to an improvement in longevity of the staining solution. Anthocyanins could potentially be used as viable histological stains having advantages of availability, feasibility, color stability and nontoxicity, although numerous modifications to improve longevity of staining solution and staining characteristics are wa