Pyruvic acid Chemical Properties
- Melting point:
- 11-12 °C(lit.)
- Boiling point:
- 165 °C(lit.)
- 1.272 g/mL at 20 °C
- 2970 | PYRUVIC ACID
- refractive index
- Flash point:
- 183 °F
- storage temp.
- Miscible with chloroform and methanol.
- 2.39(at 25℃)
- Clear colorless to light yellow or amber
- 1.2 (90g/l, H2O, 20℃)
- JECFA Number
- Stable. Combustible. Incompatible with strong oxidizing agents, strong bases. Refrigerate.
- CAS DataBase Reference
- 127-17-3(CAS DataBase Reference)
- NIST Chemistry Reference
- Pyruvic acid(127-17-3)
- EPA Substance Registry System
- Propanoic acid, 2-oxo- (127-17-3)
Pyruvic acid Usage And Synthesis
Colorless to light yellow liquid
Pyruvic acid has a sour, acetic odor (similar to acetic acid). It has a pleasant, sour taste with a burning, somewhat sweet note. It tends to darken and decompose unless kept free of minor contaminants and in tightly sealed containers
Isolated from cane sugar fermentation broth and from a few plants; also reported found in peppermint, raw asparagus, leaves and stalk of celery, onion, rutabaga, milk, cream, buttermilk, wheaten bread, blue cheeses, cheddar cheese, cottage cheese, provolone cheese, yogurt, beef, Virginia tobacco, beer, white wine, botrytised wine, cocoa and sake.
pyruvic acid is an alpha hydroxy acid that can be irritating and is considered difficult to work with. It has a larger molecular size than the most commonly used AHAs. Sodium pyruvate is more commonly used, and is an organic salt.
A fundamen- tal intermediate in protein and carbohydrate metabolism in the cell.
By distillation of tartaric acid in the presence of potassium acid sulfate as a dehydrating agent; from acetyl chloride and potassium cyanide to yield the nitrile, which is subsequently acid hydrolyzed to the acid; pyruvic acid must be rectified under vacuum.
Aroma threshold values
Aroma characteristics at 1.0%: acidic, sweet, caramellic and sour.
Taste threshold values
Taste characteristics at 5 ppm: sharp acidic, sour fruity, with sour creamy and caramellic nuances.
Pyruvic acid is a key position in cell metabolism and is involved in many catabolic and anabolic pathways, including glycolysis, gluconeogenesis, amino acid, and protein metabolism. Pyruvic acid is employed for the production of L-tryptophan, L-tyrosine, and 3,4-dihydroxyphenyl alanine in various industries. The diet supplementation with pyruvic acid increased fat loss and minimized the associated loss of body protein. Pyruvic acid is also used in biochemical researches and medicine as a substrate for assaying activities of such enzymes as pyruvate dehydrogenase, pyruvate carboxylase, and pyruvate decarboxylase (Nakazawa et al. 1972; Yamada et al. 1972; Stanko et al. 1992).
Y. lipolytica oxidize glucose and form pyruvic acid (75–80 %) and a-ketoglutaric acid (20–25 %) under thiamine deficiency conditions. The synthesis of the acid was triggered by a decrease in intracellular thiamine concentration to 3.0 lg per 1 g biomass. An approximately 3-fold increase in the amount of the biomass was associated with a subsequent decrease in thiamine content to the level of 1.0 lg per 1 g biomass, whose maximum production of pyruvic acid was 50 g/L in this condition. In addition to glucose, thiamine-auxotrophic yeasts are capable of synthesizing pyruvic acid when grown on glycerol and propionic acid. Technicalgrade glycerol is the most promising raw material for pyruvic acid production. Pyruvic acid was obtained at a concentration of 61 g/L with a yield of 71 % from glycerol (Morgunov et al. 2004; Finogenova et al. 2005).
Distil it twice, then fractionally crystallise it by partial freezing. [Beilstein 3 IV 1505.]
Pyruvic acid Preparation Products And Raw materials
- 3-METHYL-2-OXOPENTANOIC ACID CALCIUM
- 2-KETO-D-GLUCONIC ACID HEMICALCIUM SALT
- MESOXALIC ACID MONOHYDRATE DISODIUM SALT
- KETOMALONIC ACID
- Benzoylformic acid
- Calcium alpha-ketovaline
- Pyruvic acid, bromo-, ethyl ester
- Ethyl 2-(Chlorosulfonyl)acetate
- Ascoric Acid
- Folic acid
- Citric acid
- Stearic acid
- PYRUVIC ACID SODIUM EMBRYO TESTED,PYRUVIC ACID SODIUM SIGMAULTRA,PYRUVIC ACID SODIUM CELL CULTURE TESTED,pyruvic acid hybri-max sodium,pyruvic acid sodium plant cell*culture tested,pyruvic acid sodium,PYRUVIC ACID SODIUM SALT
- Pyruvic acid
- α-Lipoic Acid
- Hyaluronic acid
- Pyruvic acid, phenyl-
- Ethyl pyruvate
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