Tártaros Gonzalo Castelló. Manufacturing natural tartaric acid salts since 1907. Distributed in more than 60 countries.  Tradition linked to technology.

About us

More than 100 years of existence stand behind the activity of this company, which was established in 1907. Throughout its history, the steady growth and strong international expansion of Tártaros Gonzalo Castelló have made the company an international leader and standard-setter in the manufacturing and sale of natural tartaric acid salts and esters.


All the tartaric raw material used in the production process is derived from by-products of the grape, and is carefully selected and analyzed to ensure its traceability. This enables us to achieve continual monitoring during quality control of the production process.


Tradition together with Technology and Innovation have been and continue to be the basic elements of the strategic objectives of the company. This accounts for the excellent Quality of our products, which comply with the strictest international pharmacopoeia requirements.
Innovation is a key element in our strategy. Our R&D Department devotes the effort that is necessary in order to diversify the scope of our activity and ensure constant improvement of our products.


Our ability to provide Service to our Customers is another of the pillars of our philosophy. It keeps us in close contact with their needs and help us to provide solutions that draw on the highest technological levels of the industry.


Our philosophy of always healthy has led us to launch a new line of natural products to the market.


Various sweetener formulations and granule sizes.

We are quality

FSSC 22000

Thanks to our strict and rigorous quality control, our products reach the consumer with the maximum guarantees. We comply with the FSSC 22000 standards, one of the highest standards of quality and food safety worldwide. The FSSC 22000 standard certifies that we follow the highest quality standards in the production and packaging of our products: Cream of Tartar, Rochelle Salt, Tartaric Acid, Dipotassium Tartrate, Baking Powder, Low Sodium Salt, Free Sodium Salt, Stevia based Sweeteners, Saccharin based Sweeteners, Aspartame based Sweeteners and Cyclamate & Saccharin based Sweeteners.


Kosher and Halal certified

All our products are Kosher and Halal certified.


International Pharmacopoeia requirements

All of our products are of exceptional quality and comply with the strictest US and international Pharmacopoeia requirements (Europe, United States of America, Japan, …)


Spain, Alicante

Tártaros Gonzalo Castello, SL
Concepción Arenal, 32 03660 Novelda (Alicante)
Phone: +34 96 560 24 89 / +34 96 560 63 50
Fax: +34 96 560 64 91
Email: tartaric@tartaric.com

USA, New York

GC Chemicals Corporation
1639 Rt 10 East – Suite 202, Parsippany, NJ 07054
Phone: +1 (914) 834-4151
Fax: (914) 834-3761
Email: customerservice@gcchemicals.com