ChemicalBook CAS DataBase List Citric acid

Citric acid synthesis

8synthesis methods

Product Name:Citric acid
CAS Number:77-92-9
Molecular formula:C6H8O7
Molecular Weight:192.12

By mycological fermentation using molasses and strains of Aspergillus niger; from citrus juices and pineapple wastes

533-76-6
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77-92-9
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Yield:77-92-9 85%

Reaction Conditions:

Stage #1: 3,4-dioxo-adipic acidwith N-benzyl-trimethylammonium hydroxide in water at 45; for 6 h;
Stage #2: with hydrogenchloride in water; pH=2.9;

Steps:

9

Example 9 Synthesis of 2-Hydroxypropane-1,2,3-Tricarboxylic Acid A solution of 3,4-dioxohexanedioic acid (0.1 mol) in Triton B (0.2 mol in 5 ml of water) was heated at 45° C. for 6 hrs. The mixture was cooled and acidified with 30% hydrochloric acid up to pH 2.9. The solid filtered and wash with cold water to obtained 2-hydroxypropane-1,2,3-tricarboxylic acid in 85% yield.

References:

US2010/249451,2010,A1 Location in patent:Page/Page column 3-4

β-D-Glucopyranoside, [[3-hydroxy-1,5-dioxo-3-[[[4-[(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)oxy]phenyl]methoxy]carbonyl]-1,5-pentanediyl]bis(oxymethylene-4,1-phenylene)]bis-, 2,2',3,3',4,4',6,6'-octaacetate

77182-75-3
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77-92-9
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(2R,3R,4S,5R,6S)-2-(acetoxymethyl)-6-(p-tolyloxy)tetrahydro-2H-pyran-3,4,5-triyl triacetate

14581-78-3
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References

99-14-9
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$16.00/1g

77-92-9
1588 suppliers
$5.00/10g

References

922-84-9
17 suppliers
$2849.96/50G

77-92-9
1588 suppliers
$5.00/10g

References

3-carboxy-2,3-dideoxy-1-hydroxypropan-1,2,3-tricarboxylic acid

320-77-4
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77-92-9
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References

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