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Potassium benzoate

CAS Number
582-25-2
EC Number
209-481-3
Chemical Formula
C7H6O2.K
Molecular Weight
160.21 g/mol

Description

Potassium benzoate (CAS 582-25-2 ), also known as E212 , is the potassium salt form of benzoic acid used as a broad-spectrum preservative across food, beverage, cosmetic, and pharmaceutical applications. It inhibits the growth of mold, yeast, and bacteria, extending shelf life in acidic formulations where microbial control is critical. In food and beverage manufacturing, it is used to preserve acidic products. Common applications include carbonated drinks, fruit juices, condiments, and pickled goods, where it is preferred over sodium benzoate for its lower sodium contribution to the final product formulation. Cosmetic formulators incorporate it into rinse-off and leave-on products, including shampoos, lotions, and wipes, as a preservative active often in combination with other antimicrobials for efficacy. Pharmaceutical manufacturers use it as a preservative in oral liquid formulations and topical preparations where pH conditions support its antimicrobial activity. It also functions as a buffering agent. This material is supplied as a white crystalline powder or granules. Standard grades include food-grade ( FCC ), pharmaceutical-grade ( USP / BP ), and technical-grade for industrial applications. Packaging typically ranges from 25 kg bags to bulk quantities depending on grade and application requirements. It provides reliable stability and performance in formulations requiring mild pH stabilization. Contact us for supply of Potassium benzoate Request Quote

Other Names (Synonyms)

Benzoic acid, potassium salt | 763YQN2K7K | INS NO.212 | INS-212 | E--212 | RefChem:175422 | Benzoic acid, potassium salt (1:1) | E212

Key Technical Features

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

Physical Properties

Melting Point>300°C
Boiling Point450°C[at 101 325 Pa]
Density1.558 g/cm³ @ Temp: 20 °C
ColorWhite to off-white
FormSolid
Water Solubility492g/L at 20℃
Vapor Pressure0Pa at 25℃
pHpH(50g/l, 25℃) : 7.0~9.0
Log P-2.3 at 20℃

Safety & Handling

Warning
GHS07· Irritant

Hazard Statements

H315Causes skin irritation
H319Causes serious eye irritation

Precautionary Statements

P264Wash … thoroughly after handling.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P321Specific treatment (see … on this label).
P265Wash … thoroughly after handling.
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.

Trade & Regulatory

HS Code2916310002
Storage Class13 - Non Combustible Solids
WGK (Germany)1