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Merck
CN

60537

Potassium tartrate dibasic hemihydrate

BioUltra, ≥99.5% (NT)

Synonym(s):

L-(+)-Tartaric acid dipotassium salt, Dipotassium tartrate hemihydrate

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About This Item

Linear Formula:
KOOC(CHOH)2COOK · 0.5H2O
CAS Number:
Molecular Weight:
235.28
UNSPSC Code:
12352200
Beilstein/REAXYS Number:
6121656
MDL number:
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InChI key

BUCMCXRUIRJPKS-QXMMYYGRSA-L

SMILES string

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

InChI

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

product line

BioUltra

assay

≥99.5% (NT)

impurities

Insoluble matter, passes filter test

pH

7.0-8.5 (25 °C, 1 M in H2O)

solubility

H2O: 1 M at 20 °C, clear, colorless

anion traces

chloride (Cl-): ≤50 mg/kg, sulfate (SO42-): ≤50 mg/kg

cation traces

Al: ≤5 mg/kg, As: ≤0.1 mg/kg, Ba: ≤5 mg/kg, Bi: ≤5 mg/kg, Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, Li: ≤5 mg/kg, Mg: ≤5 mg/kg, Mn: ≤5 mg/kg, Mo: ≤5 mg/kg, Na: ≤3000 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Sr: ≤5 mg/kg, Zn: ≤5 mg/kg

λ

1 M in H2O

UV absorption

λ: 260 nm Amax: 0.15, λ: 280 nm Amax: 0.10

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