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E337 (Sodium potassium tartrate)
CAS NO.: 6381-59-5
EC/LIST .:206-156-8
E337 (Sodium potassium tartrate), also known as Rochelle salt, is a double salt of tartaric acid first prepared (in about 1675) by an apothecary, Pierre Seignette, of La Rochelle, France.
E337 (Sodium potassium tartrate) and monopotassium phosphate were the first materials discovered to exhibit piezoelectricity.
This property led to its extensive use in "crystal" gramophone (phono) pick-ups, microphones and earpieces during the post-World War II consumer electronics boom of the mid-20th century.
Such transducers had an exceptionally high output with typical pick-up cartridge outputs as much as 2 volts or more.
E337 (Sodium potassium tartrate) is deliquescent so any transducers based on the material deteriorated if stored in damp conditions.
E337 (Sodium potassium tartrate) has been used medicinally as a laxative.
E337 (Sodium potassium tartrate) has also been used in the process of silvering mirrors.
E337 (Sodium potassium tartrate) is an ingredient of Fehling's solution (reagent for reducing sugars).
E337 (Sodium potassium tartrate) is used in electroplating, in electronics and piezoelectricity, and as a combustion accelerator in cigarette paper (similar to an oxidizer in pyrotechnics).
In organic synthesis, E337 (Sodium potassium tartrate)is used in aqueous workups to break up emulsions, particularly for reactions in which an aluminium-based hydride reagent was used.
E337 (Sodium potassium tartrate) is also important in the food industry.
E337 (Sodium potassium tartrate)is a common precipitant in protein crystallography and is also an ingredient in the Biuret reagent which is used to measure protein concentration.
This ingredient maintains cupric ions in solution at an alkaline pH.
E337 (Sodium potassium tartrate)e is a ferroelectric crystal with a high piezoelectric effect and electromechanical coupling coefficient.
E337 (Sodium potassium tartrate)is a colourless to white crystalline powder with a cool and saline taste.
E337 (Sodium potassium tartrate)has a pH value of 6.5 – 8.5.
E337 (Sodium potassium tartrate)has a large piezometric effect which makes it widely useful in sensitive vibrational and acoustic devices.
This article deals with E337 (Sodium potassium tartrate), also known as E337 (Sodium potassium tartrate), which is a double salt of tartaric acid.
E337 (Sodium potassium tartrate)was first prepared in the year 1672 by an apothecary, Pierre Seignette, of La Rochelle, France.
E337 (Sodium potassium tartrate) is a white crystalline powder and a slightly bitter taste.
E337 (Sodium potassium tartrate)has a pH range of 6.5 – 8.5. It is obtained by the reaction of Sodium Hydroxide on the crude Cream of Tartar which is a by-product of the Wine Industry.
E337 (Sodium potassium tartrate)is almost insoluble in alcohol and ether.
E337 (Sodium potassium tartrate)/ Rochelle salt contains ten oxygen atoms, twelve hydrogen atoms, four carbon atoms, one potassium atom, and one sodium atom.
E337 (Sodium potassium tartrate) is a white crystalline powder or colourless crystal, which is obtained by treating the natural raw tartaric material.
Our E337 (Sodium potassium tartrate) is manufactured in a completely automatic unit plant.
From this optimum automation, we are able to control every step at the production process and guarantee a natural product of high quality, which conforms to the latest requirements of the international pharmacopoeias.
Because of its widely diversified applications, we offer the product in colorless crystals and also in white crystalline powder.
E337 (Sodium potassium tartrate) is included in the list of FOOD ADDITIVES under code E-337.
E337 (Sodium potassium tartrate) has been used in organic synthesis to break up emulsions in aqueous workups.
The compound is an ingredient of Fehling's solution and of the reagent Biuret (sc-239384).
Fehling's solution tests for aldose and ketose functional groups.
Biuret reagent measures protein concentrations.
E337 (Sodium potassium tartrate) tetrahydrate is a component in the technique to produce micrometer sized aerosol particles.
The compound has been used as a precipitant in the crystallization and preliminary X-ray analysis of strictosidine synthase.
E337 (Sodium potassium tartrate) (C4H4KNaO6·4H2O, CAS Reg. No. 304-59-6) is the sodium potassium salt of l−(+)−tartaric acid and is also called the Rochelle salt.
E337 (Sodium potassium tartrate)occurs as colorless crystals or as a white, crystalline powder and has a cooling saline taste.
E337 (Sodium potassium tartrate) is obtained as a byproduct of wine manufacture.
E337 (Sodium potassium tartrate) Tetrahydrate, a crystalline solid having a large piezoelectric effect (electric charge induced on its surfaces by mechanical deformation due to pressure, twisting, or bending), making it useful in sensitive acoustical and vibrational devices.
Like other piezoelectric materials, E337 (Sodium potassium tartrate) crystals (KNaC4H4O6·4H2O) become strained when subjected to electric fields.
They decompose at moderately high temperatures (55° C [131° F]) and require protection against moisture.
Piezoelectric deformation is directly proportional to the applied electric field and reverses as the polarity of the applied field is reversed.
These basic properties are put to use in electromechanical transducers such as ultrasonic generators, microphones, and phonograph pickups and in electromechanical resonators.
Sodium and Potassium Tartrate, also known as Rochelle Salt, comes in the form of translucent crystals.
Randi Group is a supplier and producer of sodium and potassium tartrate for industrial use, particularly in the food industry, where it is known by the code E337, and in the pharmaceutical, galvanic and construction industries.
E337 (Sodium potassium tartrate) is used in food processing as an emulsifier and pH control agent It has been used medicinally as a laxative.
E337 (Sodium potassium tartrate) has also been used in the process of silvering mirrors.
E337 (Sodium potassium tartrate) is an ingredient of Fehling's solution, formerly used in the determination of reducing sugars in solutions.;
E337 (Sodium potassium tartrate) is a colorless to blue-white salt crystallizing in the orthorhombic system.
E337 (Sodium potassium tartrate) molecular formula is KNaC4H4O6·4H2O.
E337 (Sodium potassium tartrate) is slightly soluble in alcohol but more completely soluble in water.
E337 (Sodium potassium tartrate) has a specific gravity of about 1.79, a melting point of approximately 75 °C, and has a saline, cooling taste.
As a food additive, its E number is E337.;
E337 (Sodium potassium tartrate) is a double salt first prepared (in about 1675) by an apothecary, Pierre Seignette, of La Rochelle, France. As a result the salt was known as Seignette's salt or Rochelle salt.
E337 (Sodium potassium tartrate) is not to be confused with rock salt, which is simply the mineral form of sodium chloride.
E337 (Sodium potassium tartrate) and monopotassium phosphate were the first materials discovered to exhibit piezoelectricity.
This property led to its extensive use in "crystal" gramophone (phono) pick-ups, microphones and earpieces during the post-War consumer electronics boom of the mid-20th Century.
Such transducers had an exceptionally high output with typical pick-up cartridge outputs as much as 2 volts or more.
E337 (Sodium potassium tartrate) is deliquescent so any transducers based on the material deteriorated if stored in damp conditions.
E337 (Sodium potassium tartrate) is the potassium salt of tartaric acid and is produced by the reaction of tartaric acid with E337 (Sodium potassium tartrate) (Rochelle Salt) and potassium sulfate.
E337 (Sodium potassium tartrate) is a colorless crystal or white crystalline powder soluble in water.
This tartrate is used in food, medicine, chemical industry and light industry
E337 (Sodium potassium tartrate) Tetrahydrate or Rochelle salt is a double salt of tartaric acid first prepared by an apothecary
E337 (Sodium potassium tartrate) is a colorless to blue-white salt crystallizing in the orthorhombic system.
E337 (Sodium potassium tartrate) molecular formula is KNaC4H4O6·4H2O.
E337 (Sodium potassium tartrate) is slightly soluble in alcohol but more completely soluble in water.
E337 (Sodium potassium tartrate) has a specific gravity of about 1.79, a melting point of approximately 75 °C, and has a saline, cooling taste.
As a food additive, its E number is E337.
E337 (Sodium potassium tartrate) has been used medicinally as a purgative but in more recent years its piezoelectric properties have been more important and it has found usage in phonograph pickups and other sensing devices.
E337 (Sodium potassium tartrate) has also been used in the process of silvering mirrors.
E337 (Sodium potassium tartrate) is an ingredient of Fehling's solution, formerly used in the determination of reducing sugars in solutions.
In organic synthesis, it is used in aqueous workups to break up emulsions, particularly for reactions in which an aluminum-based hydride reagent was used.
E337 (Sodium potassium tartrate) is also an ingredient in the Biuret reagent which is used to measure protein concentration.
E337 (Sodium potassium tartrate) is a disodium salt of l-( + )-tartaric acid that is identified by transparent, colorless, and odorless crystals.
E337 (Sodium potassium tartrate) is obtained as a byproduct of wine manufacturing.
E337 (Sodium potassium tartrate) is generally recognized as safe (GRAS) as a direct human food ingredient.
E337 (Sodium potassium tartrate) acts as an emulsifier and pH control agent in food products
E337 (Sodium potassium tartrate) , also known as Rochelle salt, is a double salt of tartaric acid first prepared by an apothecary, Pierre Seignette, of La Rochelle, France.
E337 (Sodium potassium tartrate) and monopotassium phosphate were the first materials discovered to exhibit piezoelectricity.
This property led to its extensive use in "crystal" gramophone pick-ups, microphones and earpieces during the post-World War II consumer electronics boom of the mid-20th Century.
Such transducers had an exceptionally high output with typical pick-up cartridge outputs as much as 2 volts or more.
E337 (Sodium potassium tartrate) is deliquescent so any transducers based on the material deteriorated if stored in damp conditions.
E337 (Sodium potassium tartrate) has been used medicinally as a laxative.
E337 (Sodium potassium tartrate) has also been used in the process of silvering mirrors.
E337 (Sodium potassium tartrate) is an ingredient of Fehling's solution.
E337 (Sodium potassium tartrate) is used in electroplating, in electronics and piezoelectricity, and as a combustion accelerator in cigarette paper.
In organic synthesis, E337 (Sodium potassium tartrate) is used in aqueous workups to break up emulsions, particularly for reactions in which an aluminium-based hydride reagent was used.
E337 (Sodium potassium tartrate) is also important in the food industry.
E337 (Sodium potassium tartrate)easy to make Rochelle salt using two common kitchen ingredients.
E337 (Sodium potassium tartrate) is E337 (Sodium potassium tartrate) tetrahydrate or potassium sodium tetrahydrate (KNaC4H4O6·4H2O).
E337 (Sodium potassium tartrate) yields large piezoelectric crystals, used for science experiments and as transducers in microphones and gramophone pickups.
The chemical is a food additive that imparts a cooling, salty flavor.
E337 (Sodium potassium tartrate) also an ingredient in chemistry reagents, including Biuret reagent and Fehling’s solution.
You can purchase E337 (Sodium potassium tartrate), but it’s fairly expensive.
The starting material is tartar with a minimum tartaric acid content 68 %.
This is first dissolved in water or in the mother liquor of a previous batch.
E337 (Sodium potassium tartrate) is then basified with hot saturated sodium hydroxide solution to pH 8, decolorized with activated charcoal, and chemically purified before being filtered.
The filtrate is evaporated to 42 °Bé at 100 °C, and passed to granulators in which Seignette's salt crystallizes on slow cooling.
The salt is separated from the mother liquor by centrifugation, accompanied by washing of the granules, and is dried in a rotary furnace and sieved before packaging.
Commercially marketed grain sizes range from 2000 μm to < 250 μm (powder).
Larger crystals of E337 (Sodium potassium tartrate) have been grown under conditions of reduced gravity and convection on board Skylab .
E337 (Sodium potassium tartrate) crystals will begin to dehydrate when the relative humidity drops to about 30 per cent and will begin to dissolve at relative humidities above 84 per cent
In 1824, Sir David Brewster demonstrated piezoelectric effects using E337 (Sodium potassium tartrate)s, which led to him naming the effect pyroelectricity.
In 1919, Alexander McLean Nicolson worked with E337 (Sodium potassium tartrate) developing audio related inventions like microphones and speakers at Bell Labs.
CAS number : 6381-59-5
EC number :206-156-8
Grade :ACS,ISO,Reag. Ph Eur
Hill Formula :C₄H₄KNaO₆ * 4 H₂O
Molar Mass :282.23 g/mol
HS Code 2918 13 :00
Melting Point :70 - 80 °C
pH value :7.0 - 8.5 (H₂O)
Bulk density :1000 kg/m3
Solubility :630 g/l
Assay (alkalimetric) :99.0 - 102.0 %
Insoluble matter :≤ 0.005 %
pH-value (5 %; water; 250 °C) :7.0 - 8.5
Chloride (Cl) :≤ 0.0005 %
Phosphate (PO₄) :≤ 0.001 %
Sulfate (SO₄) :≤ 0.005 %
Heavy metals (as Pb) :≤ 0.0005 %
Ca (Calcium) :≤ 0.004 %
Cu (Copper) :≤ 0.0005 %
Fe (Iron) :≤ 0.0005 %
NH₄ (Ammonium) :≤ 0.002 %
Pb (Lead) :≤ 0.0005 %
The first step involves the Conversion of sodium bicarbonate to sodium carbonate
2NaHCO₃ → Na₂CO₃ + CO₂ + H₂O
Potassium bitartrate reacts with sodium carbonate to generate E337 (Sodium potassium tartrate) / Rochelle salt:
KHC₄H₄O₆ + Na₂CO₃ → C₄H₄O₆KNa . 4H₂O
Sodium-potassium tartrate (seignette salt, rochelle salt) is colorless rhombic crystals. Sodium-potassium tartrate melts at 70-80°С in crystallization water.
At 100°С, it turns into monohydrate KNaC4H4O6·H2O, at 130°С, it loses the last water molecule.
Under stronger heating, the reagent disintegrates releasing CO and H2O; when ignited, remaining charred mass forms KNaCO3.
E337 (Sodium potassium tartrate) (E337 (Sodium potassium tartrate), NaKC4H4O6) can easily be prepared from potassium bitartrate (KHC4H4O6) and sodium carbonate (Na2CO3).
First heat a potassium bitartrate solution.
Add sodium carbonate to the still hot solution.
Add sodium carbonate until no more reacts (Effervescence will occur).
Filter the solution while hot and then heat to evaporate the water.
After continued heating E337 (Sodium potassium tartrate) will precipitate
E337 (Sodium potassium tartrate) tetrahydrate has been used in the preparation of Lowry reagent for the determination of microsomal protein concentration in rat hepatic microsomes by Lowry method.
E337 (Sodium potassium tartrate) may be used as a constituent to prepare DNS (3,5- dinitrosalicylic acid) reagent and Fehling′s solution B, which are used in the determination of reducing sugar.
Used in Laboratory reagent, one of the ingredients in Biuret reagent to measure the concentration of protein.
E337 (Sodium potassium tartrate) is used in the electroplating process (Increases cathode efficiency.), in electronics, and piezoelectricity.
E337 (Sodium potassium tartrate) is used in cigarette paper. (Delays the consumption of cigarette paper.)
E337 (Sodium potassium tartrate) helps in maintaining alkaline pH.
E337 (Sodium potassium tartrate) is used in the silvering of mirrors. (Act as a reducing agent)
E337 (Sodium potassium tartrate) is also used in the Pharmaceutical Industry.
E337 (Sodium potassium tartrate) is used in gas purification.
E337 (Sodium potassium tartrate) is an ingredient in Fehling's solution test (reagent used in reducing sugars) and determination of uric acid.
IUPAC NAME:
Butanedioic acid, 2,3-dihydroxy-, [R-(R*,R*)]-, monopotassium monosodium salt
Kaliumnatriumtartrat
Potasio Sodio Tartrato 4-hidrato
Potassium sodium tartarate
potassium sodium tartarate
POTASSIUM SODIUM TARTRATE
potassium sodium tartrate
SYNONYMS:
Potassium sodium tartrate
Butanedioic acid, 2,3-dihydroxy-, monopotassium monosodium salt
Butanedioic acid, 2,3-dihydroxy-, potassium sodium salt (1:1:1)
Fehling's reagent (B)
Kaliumnatrium-2,3-dihydroxysuccinat (1:1:1)
MFCD00012467
MONOPOTASSIUM MONOSODIUM TARTRATE
Potassium sodium 2,3-dihydroxysuccinate (1:1:1)
Potassium sodium tartrate anhydrous
Sodium potassium (dl)-tartrate
