L-(+)-Tartaric acid

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L-(+)-Tartaric acid Specification

Smell
Odorless

Taste
Acidic taste

Structural Formula
HOOC-CHOH-CHOH-COOH

Molecular Formula
C4H6O6

HS Code
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Molecular Weight
150.09 g/mol

Boiling point
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Refractive Rate
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Classification
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Organic Acid Types
Carboxylic Acid

Inorganic Acid Types
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Grade
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Purity
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Application
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Appearance
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CAS No
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EINECS No
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Other Names
L-Tartaric acid

Usage
Primarily in food and beverage as an additive; in pharmaceuticals and industrial applications

Melting Point
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Density
Gram per cubic centimeter(g/cm3)

Solubility
Soluble in water

Raw Material
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About L-(+)-Tartaric acid

The L-(+)-tartaric acid isomer of tartaric acid is industrially produced in the largest amounts. It is obtained from lees, a solid byproduct of fermentations. The former byproducts mostly consist of potassium bitartrate (KHC4H4O6). This potassium salt is converted to calcium tartrate (CaC4H4O6) upon treatment with milk of lime (Ca(OH)2): [19]

KO2CCH(OH)CH(OH)CO2H + Ca(OH)2 Ca(O2CCH(OH)CH(OH)CO2) + KOH + H2O

In practice, higher yields of calcium tartrate are obtained with the addition of calcium chloride. Calcium tartrate is then converted to tartaric acid by treating the salt with aqueous sulfuric acid:

Ca(O2CCH(OH)CH(OH)CO2) + H2SO4 HO2CCH(OH)CH(OH)CO2H + CaSO4