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Description
Disodium L-(+)-Tartrate Dihydrate is the disodium salt of L-tartaric acid in its dihydrate form, a highly versatile material used in both analytical laboratories and organic synthesis. As a member of the chiral pool, this compound is derived from natural sources and already carries two defined stereocentres, which makes it a widely used, economical starting material for constructing chiral molecules and ligands. On the analytical side, the tartrate dihydrate salt is broadly recognised as a water reference material for Karl Fischer titration, because its water of crystallisation is fixed in amount and can be released in a controlled manner.
The properties that make this compound a preferred choice begin with its stability as a crystalline solid that is not excessively hygroscopic, together with its good solubility in water and its consistent water of crystallisation content, which is exactly what a reference standard requires. The ability of the tartrate ion to bind metals through its hydroxyl and carboxylate groups also makes the compound useful as a complexing agent that prevents metal ions from precipitating in alkaline solution. The combination of inherent chirality, complexing behaviour, and storage stability explains why it is rarely absent from the shelves of an analytical chemistry laboratory.
In Indonesian laboratories, this material is typically found wherever routine moisture determination and asymmetric synthesis work are carried out — university teaching and research laboratories, quality control laboratories in the pharmaceutical and food sectors, and analytical service laboratories that operate Karl Fischer titrators. Its role is usually a supporting one: standardising instruments, keeping metal ions in solution during sample preparation, or serving as an inexpensive chiral starting point for further synthetic work.
Laboratory Applications
Karl Fischer water standard — the fixed and reproducible water of crystallisation is released in a controlled way, allowing analysts to verify and calibrate the titre of Karl Fischer reagent reliably.
Chiral building block in asymmetric synthesis — the two naturally defined stereocentres provide ready-made stereochemical information, so chemists can build chiral ligands and target molecules without a separate resolution step.
Complexing agent for metal ions — the hydroxyl and carboxylate groups chelate metals and keep them dissolved in alkaline media, preventing the hydroxide precipitation that would otherwise disturb an analysis.
Preparation of chiral ligands for catalysis — because it comes from the chiral pool at low cost, it serves as an economical entry point for synthesising tartrate-derived ligands used in stereoselective reactions.
General analytical reagent preparation — good water solubility and crystalline stability make it straightforward to weigh accurately and dissolve when preparing buffer or masking solutions in routine laboratory work.
Specifications
Brand: TCI
Product code: D4027
CAS number: 6106-24-7
Category: Chemistry > Asymmetric Synthesis > Chiral Building Blocks
Physical form: crystalline solid (dihydrate)
Pack sizes: available in standard TCI catalogue pack sizes; please confirm the required size when ordering
Storage: store in a tightly closed container at room temperature, protected from moisture
Handling and Storage
Store the material in a tightly closed original container at ambient room temperature, in a dry and well-ventilated area away from direct sunlight and sources of heat. Glass or chemically compatible plastic containers with a secure closure are suitable; keeping the container properly sealed is particularly important when the material is used as a water reference, since uncontrolled uptake or loss of moisture would compromise its water content. Handle it in a clean, dry working area, use a clean dry spatula for weighing, and close the container immediately after use. Observe standard laboratory practice: wear a laboratory coat, safety glasses, and gloves, avoid generating dust, and wash hands after handling. Always consult the manufacturer's safety data sheet before use.
