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Sodium propionate

CAS Number
137-40-6
EC Number
205-290-4
Chemical Formula
C3H6O2.Na
Molecular Weight
96.06 g/mol

Description

Sodium propionate (CAS 137-40-6 ), also recognized by its food additive designation E281 , is the sodium salt of propionic acid used commercially as a preservative and pH buffering agent. It inhibits mold and bacterial growth across food, feed, pharmaceutical, and personal care applications. Supplied in anhydrous form, it offers reliable shelf-life extension in moisture-sensitive formulations. In baked goods, E281 is applied to bread, cakes, and pastries to suppress mold development and extend retail shelf life without affecting flavor profiles. Animal feed manufacturers incorporate it as an antifungal agent in compound feeds and grain storage to prevent spoilage during transport and storage. Pharmaceutical formulators use it as a buffering agent and preservative in topical preparations and oral dosage forms. It is also utilized in ophthalmic solutions and personal care products. In personal care, it functions as a preservative booster in creams, lotions, and rinse-off products where low-pH stability is required for the final formulation. Sodium propionate is supplied as a white crystalline powder or granules, with granulated forms preferred where dust control matters in feed and industrial handling. This ensures a safer and cleaner working environment during the manufacturing process. Standard grades include food-grade ( FCC ), feed-grade, and pharmaceutical-grade ( USP / BP ) to meet regulatory requirements across industries. These quality standards ensure the product is suitable for its intended high-purity application. Packaging typically ranges from 25 kg bags to bulk quantities depending on application volume. This flexibility allows for efficient logistics and storage management for both small-scale producers and large industrial manufacturers. Contact us for supply of Sodium propionate Request Quote

Other Names (Synonyms)

propionic acid sodium salt | E281 | sodium propionate anhydrous | Sodium propanoate | Propanoic acid, sodium salt | Napropion | Propiofar | Propisol

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point289 °C
Density1.51[at 20℃]
Appearancewhite powder
ColorWhite
Odorat 100.00?%. bland
FormCrystalline Powder
Water Solubility995 g/L (20 ºC)
Vapor Pressure0Pa at 20℃
pH8-9.5 (10g/l, H2O, 20℃)
Log P-3.23 at 25℃

Safety & Handling

Danger
GHS05· CorrosiveGHS07· IrritantGHS09· Environment

Hazard Statements

H302Harmful if swallowed
H312Harmful in contact with skin
H317May cause an allergic skin reaction
H318Causes serious eye damage
H319Causes serious eye irritation
H411Toxic to aquatic life with long lasting effects

Precautionary Statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P272Contaminated work clothing should not be allowed out of the workplace.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P317Get emergency medical help.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P391Collect spillage.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P317Get emergency medical help.
P352IF ON SKIN: Wash with plenty of water.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29159000
Storage Class11 - Combustible Solids
WGK (Germany)1