Potassium tartrate dibasic hemihydrate

Quality Level

200

assay

99-102% (perchloric acid titration)

form

solid

quality

meets analytical specification of DAC, E336

impurities

≤0.001% ammonium (NH₄)
≤0.001% heavy metals (as Pb)

loss

≤4% loss on drying, 150 °C, 4 h

pH

7-9 (20 °C, 0.1%)

anion traces

chloride (Cl^-): ≤500 mg/kg
oxalate (as oxalic acid): ≤100 mg/kg
sulfate (SO₄^2-): ≤1000 mg/kg

cation traces

As: ≤3 mg/kg
Ca: ≤100 mg/kg
Cu: ≤10 mg/kg
Fe: ≤20 mg/kg
Hg: ≤1 mg/kg
Pb: ≤5 mg/kg
Zn: ≤10 mg/kg

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

InChI key

BUCMCXRUIRJPKS-QXMMYYGRSA-L