FDA Status
Approved
Preservative · EU 339
Monosodium Phosphate
FDA status: Approved. EU: Approved. No U.S. state has enacted a specific ban yet.
4.0 / 5
Composite safety Low Risk
Score 4 of 5
Monosodium Phosphate: 4/5 (Low Risk)
According to the U.S. Food and Drug Administration, Monosodium Phosphate is FDA-approved, and no U.S. state has moved to restrict it independently of federal policy. Its composite safety score is 4 out of 5 (Low Risk), and the European Union separately classifies it as approved. It is a comparatively niche additive by product count.
- 47th percentile by tracked product prevalence
The verdict
Monosodium Phosphate is FDA-approved, and no U.S. state has moved to restrict it. It is a comparatively niche additive by product count (47th percentile by tracked product count).
- 4/5
- Low Risk
- Approved
- FDA status
- 47th pctile
- by product prevalence
- 0
- state regulations
Monosodium Phosphate (339) is a preservative additive holding a composite safety score of 4 out of 5 (Low Risk). According to the U.S. Food and Drug Administration's Substances Added to Food inventory, it is currently classified as Approved, while the European Union lists it as Approved. This ingredient appears in approximately 15 tracked food products across our database. It is most commonly used as Processed foods, baked goods, beverages.
No U.S. state has enacted specific legislation targeting Monosodium Phosphate to date, keeping federal FDA classification as the operative standard. State-level food safety legislation remains active nationally, and that picture may shift as new bills advance.
Peer-reviewed research has flagged 1 distinct area of health concern for Monosodium Phosphate, which factors directly into the assigned safety score. All figures above draw on FDA SAFFA inventory records, EU food additive regulation (EC) No 1333/2008, EFSA scientific opinions where published, and legislative records from individual U.S. states.
Regulatory Snapshot
| Property | Value | Source |
|---|---|---|
| FDA Status | Approved | FDA SAFFA |
| EU Status | Approved | EC 1333/2008 |
| E-Number | 339 | EU additive register |
| CAS Number | - | CAS Registry |
| Category | Preservative | FDA functional class |
| Composite Safety Score | 4 / 5 (Low Risk) | PlainIngredients methodology |
| EFSA ADI | Not established | EFSA scientific opinion |
| U.S. State Actions | 0 states | State legislative records |
| Tracked Products | 15 | Open Food Facts (US) |
Values reflect official agency classifications as published by the U.S. Food and Drug Administration and the European Union's regulatory framework. See our methodology for scoring details.
EU Status
Approved
339
U.S. State Regulations
0 states
None enacted
Safety Assessment
Monosodium Phosphate's 4/5 (Low Risk) score reflects where this specific ingredient lands on that scale. The FDA has approved Monosodium Phosphate for use in food products under specified conditions.
Research has identified 1 area of health concern associated with Monosodium Phosphate. Consumers with specific health conditions should consult a healthcare provider before consuming products containing this ingredient.
How Monosodium Phosphate compares
Where a safety score of 4/5 falls among all 4,509 scored ingredients tracked on PlainIngredients.
Ingredients by safety score (Monosodium Phosphate highlighted)
4,369 of 4,509 scored ingredients (96.9%) share a safety score of 4/5.
What is Monosodium Phosphate?
MONOSODIUM PHOSPHATE, also known as monobasic sodium phosphate and sodium dihydrogen phosphate, is an inorganic compound of sodium with a dihydrogen phosphate -H2PO4−- anion.
Health Concerns
- Flagged by ANSES (French food safety agency) as additive of interest
Common Uses
Processed foods, baked goods, beverages
Frequently Asked Questions
Is Monosodium Phosphate safe to consume?
Monosodium Phosphate has a safety score of 4/5 (Low Risk). It is approved by the FDA for use in food. As with all food additives, moderation is advisable.
What is Monosodium Phosphate used for in food?
Monosodium Phosphate is commonly used as: Processed foods, baked goods, beverages. It belongs to the Preservative category of food additives.
Is Monosodium Phosphate banned in any US states?
Currently, no US states have enacted specific bans or regulations targeting Monosodium Phosphate. However, state food safety legislation is evolving rapidly.
What is the difference between FDA and EU regulation of Monosodium Phosphate?
The FDA classifies Monosodium Phosphate as "Approved", while the EU status is "Approved" (339). The FDA and EU use separate evaluation frameworks, the EU often applies the precautionary principle, sometimes banning additives that remain approved in the US. Always check both jurisdictions when evaluating food additive safety.
What health concerns are associated with Monosodium Phosphate?
Research has identified the following health concerns for Monosodium Phosphate: Flagged by ANSES (French food safety agency) as additive of interest. These findings inform its safety score of 4/5. Consult a healthcare provider for personalized guidance, especially if you have pre-existing conditions.
How is the safety score for Monosodium Phosphate calculated?
The safety score of 4/5 for Monosodium Phosphate is a composite assessment based on FDA regulatory status, EU approval status, published scientific research on health effects, and state-level legislative actions. A score of 1 means "Banned / Avoid" and 5 means "Generally Safe." The score is updated as new regulatory actions or scientific evidence emerge.
Data Sources
- FDA Substances Added to Food (SAFFA) Inventory
- EU Food Additive Regulations (EC) No 1333/2008
- State food safety legislation and bill records
Related Preservative Ingredients
What to do about Monosodium Phosphate
Use the regulatory picture, not a single score, to decide.
- Check the FDA status (Approved) and EU status (Approved) before assuming it is risk-free. How we score
- Compare it against the most-restricted additives in the U.S. supply. View rankings
- Scan a whole ingredient label at once to flag the concerning entries. Label checker
Safety scores summarise regulatory status and published concerns; they are not medical or dietary advice.
Every figure on PlainIngredients is rendered directly from FDA, EU, EFSA and U.S. state regulatory records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.