TARTAROS GONZALO CASTELLO S.L

Tártaros Gonzalo Castelló S.L. is a Spanish company founded in 1907 that specialises in the production and marketing of natural tartaric acid salts and esters. The company sources its tartaric raw materials from carefully selected grape by-products, ensuring full traceability and compliance with international pharmacopoeia standards. Over more than a century, it has grown into an international leader in its field, with products distributed in more than 90 countries. Its operations combine tradition, technology, and innovation, supported by an R&D department that continuously works to improve products and expand its range. Beyond its core tartaric products, the company has diversified into the manufacturing and packaging of sweeteners and instant iced teas. Its consumer-facing range includes cream of tartar, baking powders, Rochelle salt, and a variety of zero-calorie sweeteners such as stevia, sucralose, and saccharin, as well as sugar-free instant iced tea sticks in flavours like peach, lemon, and mango. These products are marketed under the Castelló Since 1907 brand, reflecting the company's long heritage. The company's commitment to quality and innovation has made it a global benchmark in the tartaric acid industry. Its products meet the most demanding requirements of international pharmacopeia, and its R&D efforts focus on broadening the scope of its activities and constantly improving its offerings. With a strong presence in international markets, Tártaros Gonzalo Castelló continues to evolve, developing solutions tailored to the changing demands of the food market while maintaining its traditional expertise.

Tártaros Gonzalo Castelló was founded in 1907 in Spain, establishing itself as a specialist in the production of natural tartaric acid salts. From its early years, the company leveraged grape by-products—a plentiful resource in Spain's wine-producing regions—to create high-quality tartaric derivatives. Over the decades, it built a reputation for quality and reliability, gradually expanding its reach beyond domestic borders. By the late 20th and early 21st centuries, the company had become an international leader in its niche, exporting to more than 90 countries. Its commitment to innovation led to the establishment of an R&D department focused on improving existing products and developing new applications. The company also diversified its portfolio, adding sweeteners and instant iced teas to its traditional tartaric range. In the 2010s and 2020s, Tártaros Gonzalo Castelló continued to modernise, emphasising traceability, sustainability, and compliance with international pharmacopoeia standards. Its consumer brand, Castelló Since 1907, gained visibility with products like zero-sugar iced tea sticks and natural sweeteners, catering to health-conscious consumers. Today, the company remains a family-owned private entity, proud of its heritage while embracing technological advancements to meet evolving market demands.

• 1907

  Company founded in Spain as a manufacturer of natural tartaric acid salts.

• Expanded distribution to more than 90 countries, becoming an international leader.

• Diversified into sweeteners and instant iced teas, launching the Castelló Since 1907 consumer brand.

International leader in natural tartaric acid salts and esters, combining tradition and technology since 1907.

• Natural Cream of Tartar Doypack 750g

  Pure potassium bitartrate stabiliser, natural substitute for baking powder.

• Stevia 1-1 Bulk Jar 1kg

  Zero calorie sugar alternative with exclusive manufacturing process for a single crystal.

• Peach Iced Tea 15 Sticks

  Instant, sugar-free, zero-calorie iced tea with peach flavour.

• Sucralose 102 Sachets

  10x sweeter low-calorie sweetener with zero net carbs.

• Saccharin 102 Sachets

  Traditional low-calorie sweetener for reducing sugar intake.

1. 1Tártaros Gonzalo Castelló | Manufacturing tartaric productscastello1907.com
2. 2Company | Tartariccastello1907.com
3. 3Products | Tartariccastello1907.com
4. 4Peach Iced Tea 15 Sticks | Zero Sugar | Castellócastello1907.com
5. 5TARTAROS GONZALO CASTELLO S.Lwikidata.org