Product Description
L(+)-Tartaric acid occurs as colourless monoclinic crystals or a white-to-almost-white crystalline powder. It is odourless and possesses an intensely tart taste.
L(+)-Tartaric acid is a naturally occurring compound present in grapes, berries and various wines. It exhibits antioxidant properties and imparts the characteristic sour flavour to these products.
Properties
| Melting point | 170-172 °C(lit.) |
| alpha | 12 º (c=20, H2O) |
| Boiling point | 191.59°C (rough estimate) |
| bulk density | 1000kg/m3 |
| density | 1.76 |
| vapor density | 5.18 (vs air) |
| vapor pressure | <5 Pa (20 °C) |
| FEMA | 3044 | TARTARIC ACID (D-, L-, DL-, MESO-) |
| refractive index | 12.5 ° (C=5, H2O) |
| Fp | 210 °C |
| storage temp. | Store at +5°C to +30°C. |
| solubility | H2O: soluble1M at 20°C, clear, colorless |
| form | Solid |
| pka | 2.98, 4.34(at 25℃) |
| color | White or colorless |
| Odor | at 100.00 %. odorless |
| PH | 3.18(1 mM solution);2.55(10 mM solution);2.01(100 mM solution); |
| biological source | Vitis vinifera |
| Odor Type | odorless |
| Optical Rotation | [α]20/D +13.5±0.5°, c = 10% in H2O |
| Water Solubility | 1390 g/L (20 ºC) |
| Merck | 149070 |
| JECFA Number | 621 |
| BRN | 1725147 |
| Dielectric constant | 35.9（-10℃） |
| Stability: | Stable. Incompatible with oxidizing agents, bases, reducing agents. Combustible. |
| InChIKey | FEWJPZIEWOKRBE-JCYAYHJZSA-N |
| LogP | -1.43 |
| CAS DataBase Reference | 87-69-4(CAS DataBase Reference) |
| NIST Chemistry Reference | Butanedioic acid, 2,3-dihydroxy- [r-(r*,r*)]-(87-69-4) |
| EPA Substance Registry System | Tartaric acid (87-69-4) |
Product Application
Within soft-drink, confectionery, bakery and gelatin-dessert industries, L(+)-tartaric acid finds broad application as an acidulant for flavour and acidity enhancement.
It is also utilised in photography, leather tanning, ceramics, and the manufacture of tartrate-based compounds. Its common commercial esters, including diethyl and dibutyl derivatives, are employed in lacquers and textile printing.
Furthermore, it functions as a pharmaceutical excipient and acts as a buffering agent.
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