Tartaric acid is a white crystalline organic acid that occurs naturally in many plants, most notably in grapes. Its salt, potassium bitartrate, commonly known as cream of tartar, develops naturally in the process of winemaking. It is commonly mixed with sodium bicarbonate and is sold as baking powder used as a leavening agent in food preparation. The acid itself is added to foods as an antioxidant and to impart its distinctive sour taste.
| Chemical Name | L (+)-Tartaric Acid; 1,2-Dihydroxyethane-1,2-dicarboxylic acid |
|---|---|
| Molecular Formula | C4H6O6 |
| Structural formula | |
| Molecular Weight | 150.09 |
| CAS No | 87-69-4 |
| Character | Colorless translucent crystal, or white coarse crystalline powder, with sour taste |
| Storage | Keep in a light proof, dry, cool and air tight place |
| Quality Standard | GB 25545-2010、FCC XI、OIV |
| Term of validity | 2 years |
APPLICATIONS
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Food
L (+)- Tartaric Acid is widely used as an acidic agent for beverages and other foods. It is also used in wine, soft drinks, sweets, bread, and certain jellylike desserts.
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Science
It is used as a chemical separation agent based on its optical activity.
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Chemical engineering
Based on its acidity, it can also be used as chiral raw materials for the synthesis of Tartaric Acid derivatives;
It is used as a catalyst for the finishing of polyester fabric resin, the PH regulator of the production of glutamine;
It is used for electroplating, desulfurization, pickling, chemical analysis, complexation agent, masking agent, chelating agent, printing and dyeing agent for its complex ability.
It is used as reducing agent for chemical mirror. A photographic developer.
It can also be complexed with a variety of metal ions, which can be used as cleaning agent and polishing agent for metal surface.
| TEST ITEM | LIMIT |
|---|---|
| Character | Colourless and rhombic crystals |
| Content (%) | 99.7~100.5 |
| Specific rotatory power[a]D25 | +12.0°~+13.0° |
| Loss on drying (%) | ≤0.5 |
| Residue on ignition (%) | ≤0.05 |
| Sulfate(SO4) | qualified |
| Oxalate | qualified |
| Lead (mg/kg) | ＜2 |
| Arsenic (mg/kg) | ＜2 |
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