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CAS#110-94-1, Glutaric acid, C5H8O4

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Preparation methode of Glutaric acid CAS 110-94-1
Industrially, it can be recovered from the by-product of the production of adipic acid. There are many methods for laboratory preparation.
1. Preparation of glutaric acid from γ-butyrolactone: Heat γ-butyrolactone and potassium cyanide to 190~195°C, stir and react for 2h. Cool, add concentrated hydrochloric acid to acidify to generate glutaric acid monoamide, and then heat to hydrolyze to obtain glutaric acid. The yield is 71~75%.
2. Preparation of glutaric acid from dihydropyran: heating and dissolving dihydropyran and 0.2N nitric acid on a boiling water bath, then cooling on an ice water bath, adding concentrated nitric acid, dihydropyran hydrolyzing and releasing nitrogen dioxide When the temperature drops to 0℃, add sodium nitrate and stir vigorously for 3h. No longer cooling, so that the temperature rises to 25 ~ 30 ℃. Evaporate under reduced pressure and cool to obtain glutaric acid with a yield of 70~75%.
3. Preparation of glutaric acid from glutaronitrile: heat glutaronitrile and hydrochloric acid at reflux for 4h, then evaporate to dryness, the residue contains glutaric acid and ammonium chloride, extract with hot ether, and recover the ether from the extract to obtain glutaric acid Acid, can be recrystallized with chloroform or benzene.
4. Cyclohexanone oxidation method: glutaric acid is by-produced when cyclohexanone is oxidized by nitric acid to produce adipic acid.
5. By-product recovery method: glutaric acid is recovered when paraffin is oxidized to produce oxidized paraffin. The recovery method generally adopts water extraction method (or distillation, flash evaporation and steam distillation, etc.) and crystallization method.
6. Liquid phase oxidation of cyclopentanone.
7. Dihydrofuran method. 1,3-Propanediol is also used in the laboratory to prepare glutaric acid.

 

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Name: Glutaric acid
CAS: 110-94-1
Molecular Formula: C5H8O4
Molecular Weight: 132.116
CAS 110-94-1

 

Names and Identifiers
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Synonyms 1,3-Propanedicarboxylic acid
1,5-Pentanedioic acid
Glutaric acid,(Pentanedioic acid
1,3-Propane-dicarboxylic acid)
pentanedioic acid
pentanedioate
CAS 110-94-1
EINECS 203-817-2
InChI InChI=1/C5H8O4/c6-4(7)2-1-3-5(8)9/h1-3H2,(H,6,7)(H,8,9)/p-2

 

Physico-chemical Properties
Molecular Formula C5H8O4
Molar Mass 132.116 g/mol
Melting Point 92-99℃
Boling Point 302.9°C at 760 mmHg
Flash Point 151.2°C
Solubility 430 g/L (20℃)
Vapor Presure 0.000223mmHg at 25°C

 

Risk and Safety
Hazard Symbols Xi – Irritant
Irritant
Risk Codes R36/37/38 – Irritating to eyes, respiratory system and skin.
Safety Description S26 – In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S37/39 – Wear suitable gloves and eye/face protection

 

 

 

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