Micro Crystalline Cellulose in Free Flowing Powder Form is insoluble in water, organic solvents and diluted acids. Micro Crystalline Cellulose is offered in crystalline, odourless, tasteless and free flowing powder form. Micro Crystalline Cellulose is used in vitamin supplements or tablets. Micro Crystalline Cellulose in Free Flowing Powder Form is also used in plaque assays for counting viruses, as an alternative to carboxymethylcellulose.