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Leather Chemical Free Sample
Glutaraldehyde 25% solution

Name: glutaraldehyde
CAS No.: 111-30-8
Molecular formula: C5H8O2
Molecular weight: 100.11600
Exact quality: 100.05200
PSA: 34.14000
LogP: 0.55450
Glutaraldehyde 25% solution / Physicochemical properties
Appearance and traits: transparent to pale yellow liquid
Density: 1.063 g/mL at 20 °C
Melting point: -15 °C
Boiling point: 100 °C
Flash point: 100 ° C
Refractive index: n20/D 1.450
Water solubility: miscible
Storage conditions: The warehouse is ventilated and dried at low temperature, and stored separately from oxidants and food additives.
Steam pressure: 0.583mmHg at 25°C
Glutaraldehyde 25% solution / Production method
1, pyran method: from acrolein and vinyl ether with zinc aluminum salt as a catalyst, under 90 ° C, 0.1MPa pressure, ring synthesis of 2-ethoxy-3,4-dihydropyran, reaction pot The mixture was stirred for 1 hr and allowed to stand for half an hour to obtain a glutaraldehyde solution, and the ethanol was distilled off to obtain a 25% solution, and the conversion rate was 95%. Or neutralized with sodium hydrogencarbonate, saturated with salt, and then extracted twice with diethyl ether. After recovering diethyl ether, it was distilled under reduced pressure, and a fraction of 75-81 ° C (2 kPa) was collected to obtain a pure product.
2. Pyridine method: the pyridine is reduced to dihydropyridine, and then treated with hydroxylamine to obtain pentanediol. Finally, pentanediol is decomposed with sodium nitrite and hydrochloric acid, and the decomposition product is glutaraldehyde. The conversion rate of the law can reach 90%.
3. Oxidation method: an aldehyde is prepared by an oxidation reaction using an olefin or an alcohol as a raw material. The oxidizing agent may be hydrogen peroxide, ozone, or an organic peroxide.

Glutaraldehyde 25% solution /Application
Used as a fungicide, also used in leather tanning. Leather Chemical Free Sample

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