Metatartaric acid

Metatartaric acid (CAS 39469-81-3), also known as ditartaric acid and approved as E353, is a condensation product of tartaric acid used as a stabilizing agent in food and beverage processing.

Where is Metatartaric acid used?

• Winemaking: added post-fermentation to prevent potassium bitartrate crystals, which would otherwise deposit as visible sediment in bottled wine
• Still wines and fruit wines where cold stabilization is impractical or cost-prohibitive
• Pharmaceutical formulations: buffering and stabilizing agent in liquid preparations where controlled acidity and inhibition of precipitation are required
• Fruit-based drinks and juices: maintains visual clarity during storage and distribution
• It functions by inhibiting tartrate crystal precipitation, protecting product clarity and shelf stability.

Commercial specifications

• Food-grade material conforming to E353 specifications; purity levels typically aligned to EU food additive regulations