(+/-) - 2-HYDROXYSUCCINIC ACID; (+/-) - HYDROXYBUTANEDIOIC ACID; (+/-) - HYDROXYSUCCINIC ACID; dl- 2-hydroxybutanedioic acid; DL- HYROXYBUTANEDIOIC ACID; DL- HYDROXYSUCCINIC ACID; DL- HYDROXYSUCOINIC ACID ; DL (+/-) - MALIC ACID

CAS number: 617-48-1

Molecular formula: C4H6O5

Molecular weight: 134.09

EINECS No. 210-514-9

Related Categories: MalicAcidSeries; Food Additives; Acidity Regulators; Plant Extracts; Food Additives and Acidulants; Acids; Biochemistry; Organic Acids; Organic Materials

Mol file: 617-48-1.mol

DL-malic acid

DL-malic acid properties

Melting point 131-133 ° C (lit.)

Density 1,609 g / cm3

Vapor density 4.6 (vs air)

Vapor pressure <0.1 mm Hg (20 ° C)

FEMA 2655

Flash point 203 ° C

Solubility methanol: 0.1 g / mL, clear, colorless

Stable. Incompatible with strong oxidizing agents, strong bases, amines, alkali metals, carbonates.

CAS Database 617-48-1 (CAS DataBase Reference)

EPA Chemical Information Butanedioic acid, hydroxy- (617-48-1)

DL-malic acid use and synthesis methods

Chemical Properties Malic acid is stable under normal conditions and has hygroscopicity at high humidity. Triclinic white crystals. Soluble in methanol, ethanol, acetone and many other polar solvents.

Uses Malate is internationally recognized as a safe food additive for souring agents, preservatives, and pH modifiers. It has a soft, long lasting sourness that is 20% more acidic than citric acid. Can be used for all kinds of food, according to production needs appropriate use.

Use Food industry Used as sour agent, color retention agent, preservative and egg yolk emulsion stabilizers, etc., also used in pharmaceutical

Use as biochemical reagents and experimental reagents

Uses Sour agents (pure soft drinks, concentrated soft drinks, powdered soft drinks, lactic acid bacteria drinks, milk drinks, soft drinks, cola drinks) used as soft drinks, sour agents for cold foods (fruit deodorants, ice cream), sour agents for processed foods (Chewing gum, fructose, marmalade, orange peel, tomato sauce, spicy sauce, vinegar, fruit wine, mayonnaise, margarine), antacids, color toners such as fruit drinks, preservatives Emulsion stabilizer). DL-malic acid was neutralized with sodium carbonate solution and concentrated in vacuo to yield DL-malate ([63474-37-3]). Is also a condiment, nephritis salt substitutes. Malate can be used as an additive for margarine and other edible fats. Non-food uses of malic acid include the use as raw materials for pharmaceuticals, cosmetics, dental fluids, metal cleaners, buffers, defoamers for the textile industry, industrial deodorants, optical brighteners for polyester fibers , And monomers for making alkyd resins. DL-malic acid and L-malic acid are safe and non-toxic substances. When used as a flavor enhancer, fragrance, auxiliary drug and pH control agent, the United States does not exceed 6.9% in hard candy and 0.7 in other food %, But these two kinds of malic acid can not be used for baby food, the purity of more than 99%, the melting point of 127-130 ℃, heavy metal content of 0.002% or less. Ignition residue below 0.05%. The product is a strong acid and has a pH of 2.28 at 0.1% aqueous solution at 17 ° C, which stimulates the mucosa and damages the tooth enamel.