DL-Tartaric acid

1. Introduction of DL-Tartaric Acid
DL-Tartaric Acid is a kind of food acidifier, it is crystalline powder. The IUPAC Name of it is 2,3-Dihydroxybutanedioic acid.

2. Properties of DL-Tartaric Acid
H bond acceptors: 6
H bond donors: 4
Freely Rotating Bonds: 5
Polar Surface Area: 71.06 Å²
Index of Refraction: 1.585
Molar Refractivity: 26.69 cm³
Molar Volume: 79.5 cm3
Surface Tension: 119.4 dyne/cm
Density: 1.886 g/cm³
Flash Point: 209.4 °C
Enthalpy of Vaporization: 75.13 kJ/mol
Boiling Point: 399.3 °C at 760 mmHg
Vapour Pressure: 4.93E-08 mmHg at 25°C
Melting Point: 210-212 °C(lit.)
Solubility H₂O: 0.1 g/mL, clear
Stability: Stable. Incompatible with bases, oxidizing agents, reducing agents, silver.
Appearance: white crystalline powder
Product Categories of DL-Tartaric Acid: Food & Feed ADDITIVES  

3. Structure Descriptors of DL-Tartaric Acid
SMILES: O=C(O)C(O)C(O)C(=O)O
InChI: InChI=1/C4H6O6/c5-1(3(7)8)2(6)4(9)10/h1-2,5-6H,(H,7,8)(H,9,10)
InChIKey: FEWJPZIEWOKRBE-UHFFFAOYAZ
Std. InChI: InChI=1S/C4H6O6/c5-1(3(7)8)2(6)4(9)10/h1-2,5-6H,(H,7,8)(H,9,10)
Std. InChIKey: FEWJPZIEWOKRBE-UHFFFAOYSA-N

4.Safety Information of DL-Tartaric Acid
Hazard Symbols:Xi
Risk Codes:
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Description:
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36/37:Wear suitable protective clothing and gloves. 

5. Preparation of DL-Tartaric Acid
DL-Tartaric acid is mainly present in the form of potassium salt in a variety of plants, fruits. There also a small amount present in free species. Industrial fermentation of glucose to the system used to take D-tartaric acid; raceme fumaric acid can be obtained with the potassium permanganate oxidation; in racemic maleic acid can be obtained with the potassium permanganate oxidation; L-acid wine can be split to obtain raceme.

6. Use of DL-Tartaric Acid
1) DL-Tartaric acid is widely used as beverages and other food acidifier, similar to the use and citric acid. Combination of tartaric acid and tannin can be used as mordant acid dyes, but also for the photographic industry, and the fixation of certain imaging operations, which have a photosensitive iron salts, it can be used to produce a blueprint.
2) DL-Tartaric acid with a variety of metal ions complexation can be used for metal surface cleaning agents and polishing agents.
3) DL-Tartaric acid can be prepared Fehling, but also used in medicine as laxatives and diuretics, but also as a Sims can be fun intermediates.
4) The crystal has piezoelectric properties can be used for the electronics industry.
5) DL-Tartaric Acid is used for chromatographic analysis of reagent and a masking agent. And it also used as split agent for pharmaceutical, food additives, chemical and biological reagents.
6) DL-Tartaric Acid is widely used in food industry, such as beer foam, food sour agent, Jiao flavor agent and used in soft drinks, candy, fruit juice, sauces, cold dish, and baking powder and so on. This product is in line with Japanese food additives Kimisada book.

7. Other details of DL-Tartaric Acid
General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. This material in sufficient quantity and reduced particle size is capable of creating a dust explosion.
Extinguishing Media: Use water spray, dry chemical, carbon dioxide, or chemical foam. Handling: Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Avoid ingestion and inhalation.
Storage: Store in a cool, dry place. Store in a tightly closed container.