Potassium sodium tartrate tetrahydrate
SIAL/25508 - puriss., 99.0-101.0% (calc. on H2O free substance), meets analytical specification of Ph. Eur., BP, USP, FC, E 337
Synonym: L(+)-Tartaric acid potassium Sodium salt; Rochelle salt; Seignette salt
CAS Number: 6381-59-5
Empirical Formula (Hill Notation): C4H4KNaO6 · 4H2O
Molecular Weight: 282.22
EC Number: 206-156-8
MDL Number: MFCD00150989
Linear Formula: KOCOCH(OH)CH(OH)COONa · 4H2O
Product Type: Chemical
| anion traces | chloride (Cl-): ≤20 mg/kg |
| sulfate (SO42-): ≤50 mg/kg | |
| assay | 99.0-101.0% (calc. on H2O free substance) |
| cation traces | As: ≤1 mg/kg |
| Ba:, in accordance | |
| Ca: ≤50 mg/kg | |
| Cu: ≤10 mg/kg | |
| Fe: ≤10 mg/kg | |
| Hg: ≤1 mg/kg | |
| Pb: ≤2 mg/kg | |
| Zn: ≤10 mg/kg | |
| form | solid |
| grade | puriss. |
| impurities | acidity or alkalinity, in accordance |
| residual solvent, complies | |
| ≤0.001% heavy metals (as Pb) | |
| ≤0.003% total nitrogen (N) | |
| ≤0.004% ammonium (NH4) | |
| ≤0.004% free alkali (as NaOH) | |
| ≤0.0075% free acid (as C4H6O6) | |
| 24-26% water (Karl Fischer) | |
| InChI | 1S/C4H6O6.K.Na.4H2O/c5-1( |
| InChI key | VZOPRCCTKLAGPN-ZFJVMAEJSA |
| loss | 21-26% loss on drying, 150 °C, 3 h |
| optical activity | [α]20/D +28.0 to +30.0° |
| pH | 6.5-8.5 (20 °C, 1%) |
| quality | meets analytical specification of Ph. Eur., BP, USP, FC, E 337 |
| Quality Level | 200  |
| SMILES string | O.O.O.O.[Na+].[K+].O[C@H] |
| suitability | passes test for appearance of solution |
| Application: | Potassium sodium tartrate tetrahydrate has been used in the β-1,3-glucanase activity assay. |
| Application: | Potassium sodium tartrate tetrahydrate may be used as a component to prepare DNS (3,5- dinitrosalicylic acid) reagent and Fehling’s solution B, which are used in the determination of reducing sugar. |
| General description: | Potassium sodium tartrate tetrahydrate (Rochelle salt) exists in the ferroelectric phase in the temperature range of 255 to 297K. In this phase, it crystallizes in the monoclinic system and exhibits space group P21. Saturated aqueous solution of potassium sodium tartrate (Rochelle salt) has been used for the preparation of its tetrahydrate crystals. |
| General description: | Potassium sodium tartrate tetrahydrate is a ferroelectric crystal with a high piezoelectric effect and electromechanical coupling coefficient. |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 3 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | 99.0-101.0% (calc. on H2O free substance) |
| UNSPSC | 12352100 |