byname: Left-hand tartaric Acid, rare tartaric Acid
scientific name: D (-)-2,3-dihydroxy succinic acid ;D-(-)Tartaric Acid
1.Properties: Colorless, without smell, crystal, or white powder, with strong smell, left hand, lustrous; Specific gravity is D204=1.76; It is soluble in water,alcohol,and diethyl ether.
2.Uses: It is mainly used as sour agent, biochemical reagents, racemic materials splitting agent, medicine splitting agent of beverage, sugar, bread, gelatin. Besides it can also be used as splitting agent, salt and ester of photography , can-making, printing, dyeing, and ceramics.
3.Packing and storage: Pack it in 25 kg fiber paperboard pail and store it in ventilated, dry places.
4.Standard:
| Test Item |
Specification |
Result |
| Description |
White crystals or white powder |
White crystals or white powder |
| Specific Rotation [alpha/20/D] |
-12 - -12.8 |
|
| Sulphate(SO4) |
Not more than 0.05% |
|
| Heavy Metals (Pb) |
Not more than 0.001% |
|
| Residue on Ignition |
Not more than 0.1% |
|
| Loss on drying |
Not more than 0.5% |
|
| Assay |
Not less than 99% |
|
| Optical purity (ee value) |
Not less than 99.0% |
|
| Clarity |
Qualified |
|
| Conclusion |
First grade |
|
| Test Item |
Specification |
Result |
| Description |
White crystals or white powder |
White crystals or white powder |
| Specific Rotation [alpha/20/D] |
-11.8 - -12.8 |
|
| Sulphate(SO4) |
Not more than 0.05% |
|
| Heavy Metals (Pb) |
Not more than 0.001% |
|
| Residue on Ignition |
Not more than 0.1% |
|
| Loss on drying |
Not more than 0.5% |
|
| Assay |
Not less than 99% |
|
| Conclusion |
Second grade |
|
|
