217255

Sigma-Aldrich

Potassium sodium tartrate tetrahydrate

ACS reagent, 99%

Synonym(s):
Seignette salt, Rochelle salt, L(+)-Tartaric acid potassium Sodium salt
Linear Formula:
KOCOCH(OH)CH(OH)COONa · 4H2O
CAS Number:
Molecular Weight:
282.22
Beilstein/REAXYS Number:
6113568
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

Quality Level

grade

ACS reagent

assay

99%
99.0-102.0% (ACS specification)

form

powder or crystals

impurities

≤0.005% insolubles

pH

6.0-8.5

pH range

6.0 - 8.5

anion traces

chloride (Cl-): ≤0.001%
phosphate (PO43-): ≤0.002%
sulfate (SO42-): ≤0.005%

cation traces

Ca: ≤0.005%
Fe: ≤0.001%
NH4+: ≤0.002%
heavy metals: ≤5 ppm (by ICP)

SMILES string

O.O.O.O.[Na+].[K+].O[C@H]([C@@H](O)C([O-])=O)C([O-])=O

InChI

1S/C4H6O6.K.Na.4H2O/c5-1(3(7)8)2(6)4(9)10;;;;;;/h1-2,5-6H,(H,7,8)(H,9,10);;;4*1H2/q;2*+1;;;;/p-2/t1-,2-;;;;;;/m1....../s1

InChI key

VZOPRCCTKLAGPN-ZFJVMAEJSA-L

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General description

Potassium sodium tartrate tetrahydrate is a ferroelectric crystal with a high piezoelectric effect and electromechanical coupling coefficient.

Application

Potassium sodium 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. It 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.

Packaging

2.5 kg in poly bottle
12 kg in fiber drum
100, 500 g in poly bottle

storage_class_code

13 - Non Combustible Solids

WGK Germany

WGK 3

Flash Point F

Not applicable

Flash Point C

Not applicable

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

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