Standards for tomato paste play a crucial role in ensuring quality and safety in production. Tomato is one of the most widely consumed agricultural products, and people increasingly use fresh tomatoes as the popularity of salads and tomato-based products, such as sauces and pastes, grows. Manufacturers produce tomato paste, one of the most important tomato products, in various forms, including bulk, aseptic, and canned. Currently, Iran’s national standard organization has not issued recommendations for aseptic tomato paste, and the standards for bulk tomato paste primarily focus on rules for storage and maintenance.

Definitions of tomato paste
Standards related to physical and chemical properties
The physical and chemical properties of tomato paste include Brix (solids content), salt amount, pH, and others. These factors help evaluate the quality of tomato paste.
The tomato paste standards based on the physical and chemical characteristics provided by the National Standard Organization are as follows:
The amount of filling
According to Iran’s national organizational standards, the degree of fullness of tomato paste should be at least 90%. Furthermore, this standard ensures product consistency and consumer satisfaction.
brix
Brix of tomato paste is at least 25% according to the tomato paste standards of the National Standard Organization.
PH
The acidity of tomato paste is determined by the pH index.
According to the tomato paste standards of the National Standard Organization, the pH of tomato paste should be at most 4.3.

edible salt
The only permitted additive in tomato paste is edible salt. According to the standards of the National Standard Organization, manufacturers can add up to 1.5% of edible salt. In addition, this regulation ensures the product maintains its natural flavor and quality.
Remaining skin with dimensions of 1 to 3 mm
The pieces of tomato skin left over from the peeling process should not exceed 10 pieces each can, according to the standards of the National Organization for Standardization.
Conclusion
The National Standards Organization of Iran prohibits adding any color or preservatives to tomato paste. Furthermore, manufacturers may only add edible salt to enhance the taste, and they must ensure it stays under 1.5%. As a result, these regulations help maintain the natural flavor and quality of the product.
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