E217 – Sodium propyl p-hydroxybenzoate | Sodium Propylparaben Ban, Hormone Risk & Uses

Quick analysis summary about E217 – Sodium propyl p-hydroxybenzoate food additive

Bottom line about E217

E217 is sodium propyl p-hydroxybenzoate, also known as sodium propylparaben. It is graded RED – UNSAFE because it is not authorised in EU or UK foods, and its concern follows the unresolved reproductive-toxicity assessment for propylparaben.[1,2]

Why this grade for E217

The sodium part is not the main problem. E217 is the water-soluble sodium salt of propylparaben, so toxicological concern is judged mainly through the propylparaben moiety, where a juvenile-rat study reported reduced sperm production within the old paraben group Acceptable Daily Intake (ADI) range.[1-3]

Who may want to limit or avoid E217

Consumers should avoid E217 in foods where possible, especially in imported products or markets that still allow propylparaben-type preservatives. Extra caution is reasonable for children and people limiting endocrine-active preservatives.

Common uses and where E217 appears

Where permitted, E217 may be used against yeasts and moulds, especially where a more water-soluble paraben salt is useful. It may appear in older references for confectionery, fillings, coatings, flavouring systems, sauces, or processed foods.

E217 source or origin

Commercial E217 is usually synthetic. It is produced as the sodium salt of propyl p-hydroxybenzoate to improve water solubility, this does not remove the concern linked with propylparaben.

Intake note for E217

EFSA could not recommend a specific ADI for propylparaben because there was no clear no-effect level for the key reproductive endpoint, and JECFA later removed propylparaben from the previous paraben group ADI.[1,2] For E217, a practical consumer approach is avoidance rather than calculation against a numerical safe intake.

Is E217 banned anywhere?

E217 is not authorised as a food additive in the European Union or the United Kingdom. The United States does not use E-numbers and FDA listings focus on propyl p-hydroxybenzoate rather than the E217 label. Canada allows propylparaben and its sodium salts in restricted uses after a national reassessment.

Safety grading RED – UNSAFE

E217 receives a RED – UNSAFE grade because its food-use safety is tied to propylparaben, which lost support from major assessments after male reproductive findings in young rats. The grade does not mean that one accidental trace exposure is expected to cause immediate harm. It means this preservative salt has an unfavorable evidence and regulatory profile for routine food use, especially because the key uncertainty concerns male reproductive endpoints and endocrine activity.[1-6]

Study basis or key toxicological reasoning for E217

Direct long-term food toxicology on E217 itself is limited, so the main evidence is additive-specific to propylparaben, the active preservative moiety of the sodium salt. The pivotal concern came from a four-week dietary study in juvenile male rats, where reduced daily sperm production was reported at the lowest tested dose, about 10 mg/kg body weight per day, meaning no clear NOAEL (No Observed Adverse Effect Level) was identified for that endpoint.[1,2] A later eight-week oral gavage study in juvenile male Wistar rats reported no reproductive toxicity up to 1000 mg/kg body weight per day, and human oral pharmacokinetic data show rapid absorption and clearance.[3,4] Reviews therefore describe a mixed evidence base, but this uncertainty is serious enough for a conservative food-additive grade.[5,6]

Side effects of E217 – Sodium propyl p-hydroxybenzoate food additive

Reproductive-toxicity concern: The main signal is reduced sperm production reported in juvenile male rats exposed to propylparaben.[2]
Endocrine activity: Parabens can show weak hormone-like activity in experimental systems, and propylparaben is the relevant moiety for E217.[5,6]
Regulatory non-compliance risk: In EU and UK foods, an E217 declaration would indicate an unauthorised additive rather than a normal approved preservative.
Allergy or irritation: Paraben sensitivity is more commonly discussed for skin or medicinal exposure, but sensitive individuals may still prefer to avoid propylparaben salts.
Repeated exposure uncertainty: The concern is regular dietary exposure and unresolved reproductive endpoints, not acute poisoning from one accidental trace exposure.

Should You Avoid E217 – Sodium propyl p-hydroxybenzoate food additive?

Yes. E217 is best avoided in food. It is not authorised in EU or UK food additive lists, and the concerns that removed propylparaben from reassuring ADI treatment also apply to this sodium salt. Some jurisdictions may still permit propylparaben salts under restricted conditions, but legality does not remove the unresolved reproductive and endocrine questions. For everyday shopping, choosing products without E217, sodium propylparaben, or propylparaben is the safer practical approach.

Common uses of E217 – Sodium propyl p-hydroxybenzoate food additive

Legacy preservative use against yeasts and moulds in processed foods.
Water-based food systems where the sodium salt form improves solubility.
Confectionery, coatings, fillings, or sweet preparations in markets where propylparaben salts are permitted.
Non-food uses such as medicines or cosmetics, where sodium propylparaben may appear under different regulatory rules.

Common names and synonyms of E217 – Sodium propyl p-hydroxybenzoate food additive

Sodium propyl p-hydroxybenzoate
Sodium propylparaben
Sodium propyl paraben
Sodium propyl 4-hydroxybenzoate
Sodium salt of propyl p-hydroxybenzoate
Propylparaben sodium salt
INS 217
E217

What is E217 – Sodium propyl p-hydroxybenzoate food additive?

E217 is the sodium salt of propyl p-hydroxybenzoate, a paraben preservative. Parabens inhibit yeasts, moulds, and some bacteria at low concentrations. The sodium salt form is more water-soluble than the neutral ester, which can help dispersion in water-based foods.

Toxicologically, E217 should not be viewed as a separate safety case from E216. After ingestion, the relevant concern is exposure to the propylparaben-related structure and its metabolites, not sodium itself. The current problem is that propylparaben’s food safety basis became disputed after male reproductive findings in young animals and the loss of a clear internationally accepted ADI.[1-6]

Where is E217 – Sodium propyl p-hydroxybenzoate food additive allowed (EU vs US)?

E217 is not authorised for food additive use in the European Union or the United Kingdom. In the United States, FDA listings include propyl p-hydroxybenzoate for specified food uses, but foods normally use U.S. ingredient names rather than the E217 number. Canada permits propylparaben and its sodium salts only in defined uses after reassessment.

E217 – Sodium propyl p-hydroxybenzoate