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Potassium sodium tartrate tetrahydrate

ACS reagent, 99%

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Synonym(s):
L(+)-Tartaric acid potassium Sodium salt, Rochelle salt, Seignette 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

grade

ACS reagent

Quality Level

agency

suitable for SM 4500 - NH3

assay

99%
99.0-102.0% (ACS specification)

form

powder or crystals

impurities

≤0.005% insolubles

pH

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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This Item
S23772550832312
assay

99%, 99.0-102.0% (ACS specification)

assay

≥99%

assay

99.0-101.0% (calc. on H2O free substance)

assay

≥99.5% (perchloric acid titration)

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

grade

ACS reagent

grade

-

grade

-

grade

ACS reagent, puriss. p.a.

cation traces

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

cation traces

-

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

cation traces

Ca: ≤40 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, Pb: ≤2 mg/kg, Zn: ≤5 mg/kg

pH

6.0-8.5

pH

-

pH

6.5-8.5 (20 °C, 1%)

pH

7.0-8.5 (20 °C, 5%)

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.

Storage Class

11 - Combustible Solids

wgk_germany

WGK 1

ppe

Eyeshields, Gloves, type N95 (US)


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Sodium tartrate dihydrate United States Pharmacopeia (USP) Reference Standard

USP

1614909

Sodium tartrate dihydrate

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