Potassium benzoate
Potassium benzoate
CAS: 582-25-2
Molecular Formula: C7H5KO2
Potassium benzoate - Names and Identifiers
| Name | Potassium benzoate |
| Synonyms | POTASSIUM BENZOATE Potassium benzoate benzoic acid potassium PotassiumBenzoateC7H5KO2 Kaliumbenzoat,wasserfrei POTASSIUM BENZOATE REAGENT BENZOIC ACID POTASSIUM SALT Benzoicacidpotassiumsaltanhydrous POTASSIUMBENZOATE,CRYSTAL,REAGENT |
| CAS | 582-25-2 |
| EINECS | 209-481-3 |
| InChI | InChI=1/C7H6O2.K/c8-7(9)6-4-2-1-3-5-6;/h1-5H,(H,8,9);/q;+1/p-1 |
| InChIKey | XAEFZNCEHLXOMS-UHFFFAOYSA-M |
Potassium benzoate - Physico-chemical Properties
| Molecular Formula | C7H5KO2 |
| Molar Mass | 160.21 |
| Density | 1.558 g/cm3 |
| Melting Point | >300°C |
| Boling Point | 450℃[at 101 325 Pa] |
| Flash Point | 111.4°C |
| Water Solubility | 492g/L at 20℃ |
| Solubility | Soluble in ethanol, slightly soluble in methanol, insoluble in ether. |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | White crystal |
| Merck | 14,1091 |
| BRN | 3719165 |
| PH | pH(50g/l, 25℃) : 7.0～9.0 |
| Storage Condition | Inert atmosphere,Room Temperature |
| Sensitive | 0: forms stable aqueous solutions |
| MDL | MFCD00013061 |
| Physical and Chemical Properties | White particles, flakes or crystalline powder. Odorless or nearly odorless. The melting point was 121.5-123.5 °c. Soluble in water, soluble in ethanol. |
| Use | Used as a food preservative |
Potassium benzoate - Risk and Safety
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 1 |
| FLUKA BRAND F CODES | 3 |
| TSCA | No |
| HS Code | 2916310002 |
Potassium benzoate - Introduction
It's hygroscopic. Loss of moisture at 110 ℃. Soluble in water and ethanol. The pH of 0-1mol/L aqueous solution is 8-2.
Last Update：2022-10-16 17:26:37
Potassium benzoate - Reference Information
| LogP | -2.3 at 20℃ |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | in the food feed industry as preservatives, antimicrobial agents. preservatives; Antimicrobial agents. Mainly used for margarine, thin margarine, wine. used as food preservative analytical reagent. Preservatives. Pharmaceutical. Food industry as a preservative; Antimicrobial agents. Potassium benzoate is also used as a chiming agent for pyrotechnic materials. |
| solubility in water (g/100ml) | grams dissolved per 100ml of water at different temperatures (℃): 65.8g/10 ℃;70.7g/20 ℃;76.7g/30 ℃;82.1g/40 ℃ |
| identification test | benzoate test (IT-5) positive. Or in 10% of the sample solution to add ferric chloride solution (TS-101), should generate a light yellow precipitate. Potassium test (IT-27) was positive. Or acidify 10% of the sample solution with dilute hydrochloric acid test solution (TS-117) and filter. The filtrate was adjusted to Neutral with a sodium hydroxide solution (TS-224), and 1 part by volume of a saturated sodium hydrogen tartrate solution and 1 part by volume of ethanol were added thereto, followed by shaking. A white crystalline precipitate should be formed. |
| content analysis | take sample 105% ~ 3G (accurate to 2.5 mg) pre-dried to constant weight 0.1, dissolved in 50ml water. After neutralization with 0.1mol/L hydrochloric acid [phenolphthalein test solution (TS-167) as indicator]. A few drops of diethyl ether (50ml) and bromophenol blue solution (TS-53) were added, and the mixture was titrated with 0.5mol/L hydrochloric acid under constant shaking until discoloration began. The lower aqueous layer was separated, the ether layer was washed with 10ml of water, and the washings and an additional 20ml of ether were added to the separated aqueous layer. Titrate with 0.5mol/L hydrochloric acid under constant shaking. Each ml of 80.1 mol/L hydrochloric acid corresponds to mg of potassium benzoate (C7H5KO2). |
| toxicity | ADI 0~5 mg/kg (calculated as benzoic acid, including the total ADI value of its salts and esters; FAO/WHO,2001). HACSG is listed as a restricted list. |
| usage limit | FAO/WHO(1984): Same as "07019, sodium benzoate". |
| production method | is obtained by neutralizing benzoic acid with potassium bicarbonate solution. The benzoic acid was neutralized by bicarbonate solution. |
Last Update：2024-04-09 21:00:56
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