Product Description
Sodium acetate (CAS No. 127-09-3), with the chemical formula CH₃COONa, is the sodium salt of acetic acid. It typically appears as a colorless crystalline substance with strong moisture absorption characteristics and excellent water solubility.
Due to its stable chemical properties and buffering performance, sodium acetate is widely used in laboratory and industrial applications where precise pH regulation is required. It is an important component in buffer solutions and chemical preparation processes.
In the textile industry, sodium acetate is used for acid neutralization treatment and can assist in processes involving aniline dyes. In construction applications, it functions as a concrete sealing and protective additive to help improve resistance against water-related deterioration.
In the food industry, sodium acetate is commonly used as a seasoning and acidity-regulating ingredient. Its unique heat absorption and release properties also make it valuable in thermal storage products, including reusable warmers and crystallization heating systems.
Sodium acetate can be produced through the neutralization reaction of acetic acid with sodium compounds such as sodium carbonate, sodium bicarbonate, or sodium hydroxide. Due to its excellent stability, versatility, and cost-effectiveness, sodium acetate remains an important material across chemical, food, textile, construction, and consumer product industries.
Sodium acetate Chemical Properties
| Melting point | >300 °C (dec.)(lit.) |
| density | 1.01 g/mL at 20 °C |
| FEMA | 3024 | SODIUM ACETATE |
| refractive index | 1.464 |
| Fp | >250 °C |
| storage temp. | Store at +5°C to +30°C. |
| solubility | H2O: 3 M at 20 °C, clear, colorless |
| pka | 4.756[at 20 ℃] |
| form | powder |
| color | white |
| Specific Gravity | 1.45 |
| Odor | Slight acetic acid |
| PH | 7.87(1 mM solution);8.33(10 mM solution);8.75(100 mM solution);9.04(1000 mM solution) |
| PH Range | 8.5 - 9.9 at 246 g/l at 25 °C |
| Odor Type | odorless |
| biological source | synthetic |
| Water Solubility | 500 g/L (20 ºC) |
| λmax | λ: 260 nm Amax: 0.03 |
| λ: 280 nm Amax: 0.02 | |
| Sensitive | Hygroscopic |
| Hydrolytic Sensitivity | 0: forms stable aqueous solutions |
| Merck | 148571 |
| Boiling point | >400°C(decomposition) |
| BRN | 3595639 |
| Stability: | Stable. Incompatible with strong oxidizing agents, halogens. Moisture sensitive. |
| Cosmetics Ingredients Functions | BUFFERING |
| FRAGRANCE | |
| InChI | 1S/C2H4O2.Na/c1-2(3)4;/h1H3,(H,3,4);/q;+1/p-1 |
| InChIKey | VMHLLURERBWHNL-UHFFFAOYSA-M |
| SMILES | [Na+].CC([O-])=O |
| LogP | -3.72 |
| CAS DataBase Reference | 127-09-3(CAS DataBase Reference) |
| NIST Chemistry Reference | Sodium ethanoate(127-09-3) |
| EPA Substance Registry System | Sodium acetate (127-09-3) |
| Absorption | ≤0.01 at 260nm in H2O at 100mM |
| ≤0.01 at 280nm in H2O at 100mM |
Safety Information
| Safety Statements | 22-24/25 |
| WGK Germany | 1 |
| RTECS | AJ4300010 |
| F | 3 |
| Autoignition Temperature | 607 °C |
| TSCA | TSCA listed |
| HS Code | 29152200 |
| Storage Class | 11 - Combustible Solids |
| Hazardous Substances Data | 127-09-3(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 3530 mg/kg LD50 dermal Rabbit > 10000 mg/kg |
Applications of Sodium Acetate CAS No. 127-09-3
Sodium acetate is a versatile sodium salt widely used across food processing, chemical analysis, textile manufacturing, photography, leather treatment, and other industrial fields due to its excellent buffering ability, stability, and functional properties.
Food Industry Applications
Sodium acetate is commonly used as a food additive, preservative, and acidity regulator in various food products. It is particularly applied in processed meat products, ready-to-eat foods, and salad dressings to help maintain product quality and extend shelf life. In preservation systems, it may be combined with other organic acid salts, such as lactates and propionates, to enhance antimicrobial performance.
Textile and Dyeing Applications
In textile processing, sodium acetate functions as a mordant to improve dye fixation and enhance the effectiveness of dyeing processes. It also plays a role in specialized dye formulations and textile treatment systems.
Laboratory and Analytical Applications
Due to its reliable buffering performance, sodium acetate is widely used in analytical chemistry for preparing buffer solutions and maintaining stable pH conditions during chemical experiments and testing procedures.
Industrial and Specialty Applications
Sodium acetate is also utilized in photography, glucose purification processes, leather tanning, and as a dehydrating agent in various industrial applications. Its chemical stability and compatibility make it suitable for a broad range of manufacturing processes.
With its multifunctional properties, excellent stability, and wide compatibility, sodium acetate remains an important material in food, chemical, textile, and industrial applications.
