Which tartrate stability method uses carboxymethylcellulose that reacts with tannins causing haze?

• A. Cold Stabilization
• B. Ion Exchange
• C. Carboxymethylcellulose
• D. Metatartaric Acid

Answer: (C)

Tartrate stability can be achieved by using a stabilizing additive that directly interacts with tannins to keep tartrate particles from forming visible hazes. Carboxymethylcellulose is a polymer that binds tannins and tartrate species, forming stable complexes that stay in suspension rather than crystallizing out. This makes it a practical method for preventing hazes associated with tartrate instability, which is why it’s the method described here.

Cold stabilization relies on chilling to precipitate tartrates; ion exchange removes tartrate ions with resin; metatartaric acid temporarily inhibits tartrate crystallization without the tannin–polymer interaction. The distinctive feature of carboxymethylcellulose stabilization is the use of a carbohydrate polymer that specifically interacts with tannins to stabilize tartrates.