Sodium acetate (CAS 0127-09-03) — Citrus Non-aromatic Note Fragrance Ingredient
Sodium acetate
CAS 0127-09-03
What Is Sodium acetate?
Sodium acetate is a synthetic salt commonly used as a preservative and pH regulator in food, pharmaceuticals, and cosmetics. It’s found in products from snack foods to skincare. While not a traditional fragrance ingredient, its role in stabilizing formulations makes it an unsung hero in scent longevity and product safety.
Safety Profile
GENERALLY SAFEWhat Does Sodium acetate Smell Like?
Sodium acetate itself is nearly odorless, presenting a faint alkaline sharpness reminiscent of diluted vinegar. In formulations, it acts as a silent stabilizer rather than an aromatic contributor. When heated, it may release trace acetic acid vapors carrying a subtle pickle-like sourness, but this effect is minimal in perfumery applications.
Chemistry, Properties & Perfumer Guide
The Chemistry
Sodium acetate (CH₃COONa) is the sodium salt of acetic acid, typically produced through neutralization reactions. Industrial synthesis involves reacting acetic acid with sodium carbonate or sodium hydroxide. The anhydrous form crystallizes as white hygroscopic powder. While not chiral itself, it can influence the stability of optically active fragrance compounds through pH modulation in formulations.
Physical & Chemical Properties
| Melting Point | 324 °C (anhydrous) |
|---|---|
| Solubility | 762 g/L (water, 20°C) |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Cosmetic Preservative | 0.1-1% | Up to 5% | pH buffer in emulsions |
| Fragrance Fixative | 0.5-2% | Up to 3% | Stabilizes volatile top notes |
Classic Accords
Tip: Use as a pH stabilizer in citrus-heavy fragrances prone to oxidation.
Alternatives & Comparisons
Milder buffer with similar stabilizing properties, preferred for sensitive skin formulations.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No IFRA restrictions – not classified as a fragrance ingredient
RIFM Assessment
Not evaluated by RIFM as it’s not a direct fragrance material.
Sustainability
Sodium acetate is produced synthetically from petrochemical or bio-based acetic acid. The latter offers a more sustainable route when derived from fermentation processes. As a non-volatile salt, it poses minimal environmental release concerns. Production waste streams are easily neutralized and biodegradable.
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References
- PubChem Compound Summary for Sodium acetate PubChem CID 517045
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
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