# 1-methylnaphthalene

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> Markdown URL: https://additivefacts.com/additives/1-methylnaphthalene.md

**Safety rating:** UNKNOWN
**CAS number:** 90-12-0
**Category:** flavoring
**FDA GRAS:** no
**Adverse events (FDA AERS):** 0
**FDA recalls:** 0
**Last updated:** 2026-04-02

## Summary

1-methylnaphthalene is an organic compound used as a flavoring agent in food products. It is not approved as GRAS (Generally Recognized as Safe) by the FDA, though it has no recorded adverse events or recalls associated with its food use.

## Regulatory status

| Country | Status |
| --- | --- |
| United States | approved |
| European Union | not_evaluated |
| United Kingdom | not_evaluated |
| Canada | not_evaluated |
| Australia | not_evaluated |
| Japan | not_evaluated |
| South Korea | not_evaluated |
| Brazil | not_evaluated |
| China | not_evaluated |
| India | not_evaluated |

## Detailed analysis

## What is 1-methylnaphthalene?

1-methylnaphthalene (CAS Number: 90-12-0) is an organic aromatic hydrocarbon compound consisting of a naphthalene ring structure with a single methyl group attached. In the food industry, it is classified and used as a flavoring agent or flavoring adjuvant. The compound is a crystalline solid at room temperature with a characteristic aromatic odor.

## Common Uses

As a flavoring agent, 1-methylnaphthalene is used in very small quantities in food formulations to contribute to or modify flavor profiles. Like many synthetic flavoring compounds, it would typically be used in trace amounts in products such as beverages, confectionery, baked goods, and other processed foods where specific aromatic notes are desired. The actual prevalence of its use in commercial food products is limited, partly due to its regulatory status and the availability of alternative approved flavoring agents.

## Safety Assessment

According to FDA records, there are zero reported adverse events associated with 1-methylnaphthalene consumption, and no food recalls have been issued related to this additive. These data points suggest that at the levels used in food applications, the substance has not generated safety concerns sufficient to trigger regulatory action or consumer complaints.

However, it is important to note that the absence of reported adverse events does not automatically establish safety in the formal regulatory sense. The compound's lack of GRAS status indicates that it has not undergone the comprehensive safety evaluation and approval process that would be required for widespread use in food. GRAS designation requires substantial evidence demonstrating that a substance is safe under its conditions of intended use, typically based on scientific literature, expert consensus, or a history of safe use prior to 1958.

Limited toxicological data are publicly available for 1-methylnaphthalene specifically in food applications. The compound's chemical structure as a polycyclic aromatic hydrocarbon (PAH) derivative means that general PAH toxicology research may provide some relevant context, though individual compounds within this chemical family can have significantly different safety profiles.

## Regulatory Status

1-methylnaphthalene is not FDA GRAS-approved for use as a food additive or flavoring agent in the United States. This means that while it may be used in food, it does not have the formal regulatory clearance that GRAS status would provide. Any food manufacturer using this substance would need to comply with applicable regulations regarding food additives and potentially obtain FDA approval through the food additive petition process.

The regulatory status may vary internationally. Some jurisdictions have different approval processes and may permit or restrict this substance differently. Manufacturers marketing products globally must ensure compliance with the specific regulations of each target market.

## Key Studies

Published scientific literature specifically addressing 1-methylnaphthalene's safety in food is limited. Most available research focuses on naphthalene and its derivatives in environmental or occupational contexts rather than food use. General toxicological principles for similar aromatic compounds suggest that comprehensive safety data would include acute toxicity studies, repeated-dose studies, and genotoxicity assessments.

Any organization seeking to establish GRAS status for this substance, or to use it in food products in regulated markets, would need to compile a safety dossier with relevant toxicological and analytical data, potentially commissioning new studies to fill data gaps. The burden of proof for safety rests with the manufacturer or petitioner seeking approval.

## Sources

- FDA Substances Added to Food (CFSAN)
- OpenFDA Adverse Event Reporting System (AERS)
- OpenFDA Food Recalls
- EFSA OpenFoodTox
- EU Food Additive Portal

## Citation

Additive Facts. "1-methylnaphthalene — Safety, regulation, and evidence." https://additivefacts.com/additives/1-methylnaphthalene. Accessed 2026-05-12.