Potassium sodium tartarate
potassium sodium tartrate
CAS: 304-59-6
Molecular Formula: C4H4KNaO6
Potassium sodium tartarate - Names and Identifiers
Potassium sodium tartarate - Physico-chemical Properties
| Molecular Formula | C4H4KNaO6 |
| Molar Mass | 210.16 |
| Density | 1.24 |
| Melting Point | 70~80℃ |
| Boling Point | 100 °C |
| Flash Point | 209.4°C |
| Water Solubility | g anhydrous/100 g H2O: 31.9 (0°C), 67.8 (20°C), 102 (30°C) [LAN05]; slightly soluble alcohol [MER06] |
| Solubility | Methanol, Water |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | Liquid |
| Color | Clear Colorless |
| Maximum wavelength(λmax) | ['λ: 260 nm Amax: 0.03', , 'λ: 280 nm Amax: 0.025'] |
| PH | 7.0-8.5 (25℃, 1.5M in H2O) |
| Storage Condition | Room Temperature |
| Physical and Chemical Properties | Character tetrahydrate is white crystalline powder. melting point 70~80 ℃ relative density 1.79g/cm3 solubility: soluble in 0.9 parts of water, almost insoluble in ethanol. |
| Use | In the food industry as baking powder, plate-making, mirror-making in the printing industry, hot water bottle industry as reducing agent |
Potassium sodium tartarate - Risk and Safety
| WGK Germany | WGK 3 |
Potassium sodium tartarate - Upstream Downstream Industry
Potassium sodium tartarate - Nature
Open Data Verified Data
The tetrahydrate was a white crystalline powder. At 60 ℃, partial crystal water was lost; At 100 ℃, trimolecular crystal water was lost; At 130-140 ℃, it became anhydrous; And at 220 ℃, it began to decompose. Soluble in 0.9 water, almost insoluble in ethanol, aqueous solution was slightly alkaline pH 7~8. Slightly weathered in hot air.
Last Update：2025-06-10 22:55:16
Potassium sodium tartarate - Preparation Method
Open Data Verified Data
with tartaric acid as raw material and sodium, potassium and potassium base neutralization of potassium sodium tartrate crude product, crude product after crystallization refined to get the finished product.
Last Update：2022-01-01 09:25:32
Potassium sodium tartarate - Application
Open Data Verified Data
It is used for the preparation of the philin solution, the determination of the masking agent and the reducing agent, and the biochemical test of the serum protein. Also used in the printing industry plate I electroplating industry as a complexing agent; Medicine as laxative; Telecommunications industry for crystal horn and microphone; Chemical fertilizer industrial desulfurization agent.
Last Update：2025-08-19 16:24:40
Potassium sodium tartarate - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Application | Using its piezoelectric properties, it can be made into piezoelectric elements, which are used in radios and radio radio radios and pickups, but it has It has the disadvantages of easy decomposition, brittle performance, and easy solubility in water. It is also used to make baking powder, medicine, plating mirror and chemical reagent. |
| Overview | Potassium sodium tartrate (molecular formula KNaC4H4O6 · 4H2O) is also called sodium tartrate potassium, Roche salt, Roche salt, and Rochelle salt. It is a double salt formed by sodium tartrate and potassium tartrate. It is a colorless to blue-white orthorhombic crystal, soluble in water, slightly soluble in alcohol, salty and cool, and the aqueous solution is slightly alkaline. The specific gravity is 1.79, the PH value is 6.8-8, the melting point is 70-80°C, and it is slightly weathered in hot air. Part of the crystal water is lost at 60°C, 3 water molecules are lost at 100°C, and all the crystal water is lost at 215°C and becomes anhydrous salt. Potassium sodium tartrate is divided into two types: D type and DL type, D type is colorless Transparent crystal, the solubility in water is 138.3g at 100 ml at 30 ℃. Insoluble in alcohol. It has complexability and can form soluble complexes with copper, iron, lead, chromium, brocade and other metal ions in alkaline solution. DL type is white fine crystal with density of 1.783g/cm3. Melting point 100 ℃. Weathering in hot air, losing part of crystal water at 60 ℃ and all crystal water at 215 ℃. The solubility in water at 30 ℃ is 117.62g, which is insoluble in alcohol. It has complexation. Two moles of potassium hydrogen tartrate are dissolved in water and heated, one mole of sodium carbonate is added, filtered while hot, and the insoluble matter is dried and crystallized to obtain potassium sodium tartrate. It can be used as a laxative, food additive, piezoelectric element, and also as a chemical reagent for preparing film reagent, biuret reagent and reducing agent for lens making. |
| reference quality index | [U.S. food chemistry code (III)] project index content% ≥ 99.0-102.0 alkalinity qualified arsenic (as)%≤ 0.0003 heavy metal (Pb)%≤ 0.001 moisture% 21-26 [enterprise standard Zhejiang Q/HG079-81 (plating grade)] project index potassium sodium tartrate content% ≥ 98.0 chloride (Cl)%≤ 0.005 heavy metal (in Pb)%≤ 0.001 sulfate (SO4)%≤ 0.03 iron (Fe)%≤ 0.002 arsenic (in As)%≤ 0.0002 aqueous solution reaction qualified water insoluble% ≤ 0.01 |
| preparation method and production process | put the raw tartaric acid into the cylinder, add twice the amount of water, heat and boil with steam, and slowly add dry sodium carbonate to neutralize under constant stirring until no bubbles are generated. At this time, the solution was neutral with litmus paper test. Filter in a cloth bag while it is hot. The filtrate should be transparent or nearly transparent. Move the filtrate into an enamel barrel, heat and evaporate until the concentration of the solution is 38-42 bomet, take it out and place it in a shallow disk (the thickness is appropriate to be 15-20cm), and let it stand at room temperature for 24 hours to crystallize naturally. The mother liquor is separated, the crystallization is taken out, and the crystal is washed once with cold water (the washing water and the mother liquor are combined and recovered) to obtain a crude product of potassium sodium tartrate. Add a proper amount of water (1-2 times) to heat and dissolve the crude product, add activated carbon to decolorize (the amount of activated carbon added is 5-15% of the sample amount) and stir for 10 minutes, then filter (the filtrate is treated with crude crystallization, recrystallized, and the crystals should be colorless and transparent) to separate the mother liquor, and air dry after washing or dry at 50 ℃ to obtain the finished product. |
| the function and use of potassium sodium tartrate | used to prepare Fei Lin's solution, biuret reagent, masking agent, reducing agent determination, food additive, biochemical test of serum protein. It is also used in printing industry plate making and mirror making. Hot water bottle industry as reducing agent; Electroplating industry as complexing agent; As a laxative in medicine; It is used to make crystal speakers and microphones in telecommunication industry. ADA desulfurizer in fertilizer industry, etc. |
| content analysis | determined by GT-2 method. 0.5mol/L sulfuric acid per Ml is equivalent to 70.56mg of potassium sodium tartrate (C4H4KNaO6?4H2O). |
| toxicity | non-toxic. GRAS(FDA,§ 184.1804,2000). ADI 0~30 mg/kg(FAO/WHO,2001). |
| use limit | FDA,§ 184.1804.(2000): GMP is limited. |
| Use | Used as baking powder in the food industry, plate making and mirror making in the printing industry Used for the preparation of Ferlin solution and Banshi solution, and also used as piezoelectric element Used as baking powder in the food industry, plate making and mirror making in the printing industry, and reducing agent in the thermos industry |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 02:00:05
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View History
Raw Materials for Potassium sodium tartarate
Sodium carbonate
Potassium hydroxide
Sodium hydroxide
Maleic anhydride
Potassium carbonate
Sodium carbonate
Potassium hydroxide
Sodium hydroxide
Maleic anhydride
Potassium carbonate
Sodium carbonate
Downstream Products for Potassium sodium tartarate