Sodium acetate trihydrate
CAS 6131-90-4
EC 612-115-9
Formula C2H4O2.3H2O.Na
MW 136.08 g/mol
Salts & Minerals Pharmaceuticals & HealthcareFood & NutritionWater TreatmentPersonal Care & Cosmetics pH Regulation & BufferingPreservation & BiocideCatalysis
Description
Sodium Acetate Trihydrate (CAS 6131-90-4) is the hydrated sodium salt of acetic acid, also sold under the names sodium acetate 3H2O, hydrated sodium acetate, and acetic acid sodium salt. It carries no E-number designation but is recognised under EC number 612-115-9 and HS code 29152200.
In food and pharmaceutical manufacturing, it functions as a pH buffer by resisting acidic or alkaline shifts in solution, maintaining stable processing conditions across a defined pH range. In water treatment, it serves as a carbon source for biological denitrification, feeding microbial activity that reduces nitrate levels in effluent streams.
Sodium Acetate Trihydrate is available in food-grade, pharmaceutical-grade (Ph.Eur., USP/FCC), and technical-grade forms, supplied as crystalline solid or powder. It is fully registered under REACH and commonly packaged in 25 kg bags or bulk quantities to suit industrial procurement requirements.
In food and pharmaceutical manufacturing, it functions as a pH buffer by resisting acidic or alkaline shifts in solution, maintaining stable processing conditions across a defined pH range. In water treatment, it serves as a carbon source for biological denitrification, feeding microbial activity that reduces nitrate levels in effluent streams.
Sodium Acetate Trihydrate is available in food-grade, pharmaceutical-grade (Ph.Eur., USP/FCC), and technical-grade forms, supplied as crystalline solid or powder. It is fully registered under REACH and commonly packaged in 25 kg bags or bulk quantities to suit industrial procurement requirements.
Physical Properties
| Melting Point | 58.17 °C |
| Boiling Point | >400°C |
| Density | 1.5 g/cm³ (approx) |
| Flash Point | >250°C |
| Appearance | white to colourless crystals or powder |
| Color | White tranparent |
| Odor | Slight acetic acid |
| Form | Solid |
| Water Solubility | 762 g/L (20 ºC) |
| pH | 7.5-9.0 (25℃, 50mg/mL in H2O) |
| Log P | -0.285 (est) |
Trade & Regulatory
| HS Code | 29152200 |
| WGK (Germany) | 1 |
Other Names
hot icesodium acetate hydratehydrated sodium acetateSODA CAUSTICSODIUM ACETATESODIUM ACETATE 3H2OACETIC ACID SODIUM SALT
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