D‑(-) Tartaric Acid

D‑(-) Tartaric Acid

CAS Number: 147‑71‑7

Synonyms: (2S,3S)-(-)-Tartaric acid; D‑Threaric acid; D‑(-)-Tartaric acid

Chemical Formula:C₃H₃NO₂

Product Introduction

D‑(-) Tartaric Acid is the levorotatory enantiomer of tartaric acid, appearing as white crystalline powder. It’s commonly used in chiral resolution, analytical chemistry, food acidification, and as a chelating/stabilizing agent in metal processing.

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Physical & Chemical Properties

Property Value
Appearance White crystalline powder
Purity ≥ 99 %, ≥ 98 % ee (enantiomeric purity)
Melting Point ~166–169 °C
Density ~1.6–1.9 g/cm³ (solid)
Solubility Soluble in water; also in ethanol and ethyl acetate
Molecular Weight 150.09 g/mol
Optical Rotation [α]₂₀ᴅ ≈ —12° (c=1, H₂O)

Applications

  • Chiral auxiliary/resolution: Common in asymmetric synthesis and enantiomeric separations.
  • Food & beverage: Used as an acidifier and stabilizer.
  • Metal processing: Acts as chelating agent in copper oxide, tin plating.
  • Analytical chemistry: Component of buffer solutions and pH calibration.

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