4-amino-5,6-dimethylthieno[2,3-d]pyrimidin-2(1h)-one Hydrochloride

4-amino-5,6-dimethylthieno[2,3-d]pyrimidin-2(1h)-one Hydrochloride (CAS Number: 1033366-59-4) is a synthetic organic compound belonging to the thieno-pyrimidine chemical class. The compound consists of a fused ring system containing sulfur and nitrogen atoms, with amino and methyl functional groups. The hydrochloride salt form is the version used in food applications, which improves solubility and stability characteristics compared to the base compound.

This additive is classified as a flavoring agent or flavor adjuvant, meaning it is used to enhance, modify, or improve the taste characteristics of food and beverage products. Flavoring agents and adjuvants work by interacting with taste receptors and olfactory systems to create or intensify desired flavor profiles. The specific organoleptic properties of this compound make it suitable for use in various food categories, though detailed commercial applications remain limited in publicly available literature.

According to FDA records, there are currently zero reported adverse events associated with this additive and zero product recalls linked to its use. This absence of reported safety incidents is notable and suggests either minimal use in the food supply, careful manufacturing practices, or a favorable safety profile in applied concentrations.

The compound has not been designated as GRAS (Generally Recognized as Safe) by the FDA. GRAS status is typically granted to substances with a long history of safe use in food or those supported by substantial scientific evidence of safety. The lack of GRAS designation does not necessarily indicate a safety concern; rather, it may reflect the additive's limited market penetration, recent development, or the complexity of the safety dossier required for such classification.

This additive operates under specific regulatory frameworks depending on jurisdiction. In the United States, flavoring agents and adjuvants must comply with FDA regulations and are subject to the Food Additives Amendment (1958). The FDA maintains authority over such compounds through the approval process for food additives, though some flavoring substances may be approved through petition or alternative regulatory pathways.

The lack of available regulatory approvals from major food safety authorities suggests this compound either has limited commercial use, is still under evaluation, or may be reserved for specific regional markets with different regulatory requirements. Food manufacturers considering use of this additive would need to ensure compliance with applicable regulations in their target markets.

Publicly available peer-reviewed research specific to this compound's safety and functionality in food applications appears limited. The synthetic nature of this thieno-pyrimidine derivative and its relatively recent CAS registration (2010s) suggest it is a newer compound in the flavoring industry. Safety evaluation would typically include toxicological studies covering acute toxicity, genotoxicity, and potential metabolic pathways.

For any additive not yet extensively studied in independent academic literature, comprehensive safety data typically resides in proprietary industry dossiers submitted to regulatory agencies during approval processes. Manufacturers using this additive should maintain documentation of safety assessments and compliance testing.