L (+)-Sodium Tartrate

Chemical Name L(+)-Sodium Tartaric;
L (+)-Disodium Tartrate Dihydrate;
Disodium L-(+)-tartrate
Sodium Tartrate-2-Hydrate- Extra Pure, E335;
Sodium tartrate dehydrate;
Disodium (2R,3R)-2,3-Dihydroxybutanedioate;
Sal Tartar;
Sodium L-(+)-tartrate;
Bisodium tartrate;
Molecular Formula C4H4O6Na2·2H2O
Structural Formula
Molecular Weight 230.08
CAS No 868-18-8 (anhydrous)
6106-24-7 (dihydrate)
Character Transparent colorless prismatic crystal or white crystalline powder. Odourless. Salty. The air is slightly hygroscopic. Dissolved in water, the aqueous solution is left-handed, neutral. 5% aqueous solution with a pH of 7 ~ 9. Insoluble in ethanol and ether. Start losing water of crystallization when reach to 120℃, and then decomposition when keep heating. The smell like sugar when burning, its residue (ash) is a strongly alkaline, produces foam when contact acid.
Storage Ventilation, dryness, sun protection
Quality standard Japan’s Specifications and standards for food additives(7th-Ed)
Term of validity 2 years


  • In the determination of trace analysis of vanadium, calibration of Karl fischer reagent, and used as masking agent, complexing agent, biochemical reagents.
  • Used to treat hyperacidity.
  • It can also be used as chelating agent; Acid modifier; Buffer; Emulsifying salts; Antioxidants; Antioxidant synergist.
  • Used as condiment in refreshing drinks, sake and other flavoring agents. It is also used for oil, jam, jelly, margarine, meat products and sausages.
  • Combined with Tartaric Acid can make Tartaric Acid mild.
Test Item Limit
Content (C4H4O6Na2·2H2O %) ≥99.0
Description colorless and clarify
Chloride (Cl %) ≤0.005
Sulfate (SO4 %) ≤0.019
Oxalate (%) Experiment
Heavy metal (Pb %) ≤0.001
Iron (%) ≤0.005
Zinc (%) ≤0.005
PH 7~9
Arsenic (%) 0.0004
Clarity Qualified
Loss on drying (%) 14-17
Phosphate (PO4 %) ≤0.005
Specific rotatory power[a]D25 +25.0°~+27.5°