Methyl cellulose (or methylcellulose) is a chemical compound derived from cellulose.
It is a hydrophilic white powder in pure form and dissolves in cold (but not in hot) water, forming a clear viscous solution or gel. It is sold under a variety of trade names and is used as a thickener and emulsifier in various food and cosmetic products, and also as a treatment of constipation. Like cellulose, it is not digestible, not toxic, and not an allergen.
Methocel® A4C is "A" Grade Methylcellulose. It forms a firm gel at 50-55°C. It has a low viscosity of 400 cP