柠檬酸 一水合物

等级

ACS reagent
puriss. p.a.

质量水平

200

Agency

USP/NF
reag. ISO
reag. Ph. Eur.

方案

99.5-100.5% (calc. on anhydrous substance)
99.5-102%

表单

solid

杂质

≤0.005% insolubles in water
≤2 ppm heavy metals (as Pb)
7.5-9.0% water (Karl Fischer)

灼烧残渣

≤0.01% (as SO₄)

pKa 

(1) 3.13, (2) 4.76, (3) 6.4

痕量阴离子

chloride (Cl^-): ≤5 mg/kg
oxalate (C₂O₄^2-): ≤100 ppm
phosphate (PO₄^3-): ≤10 mg/kg
sulfate (SO₄^2-): ≤20 ppm

痕量阳离子

Ca: ≤50 mg/kg
Cu: ≤5 mg/kg
Fe: ≤3 ppm
Pb: ≤2 ppm
Zn: ≤5 mg/kg

适用性

complies for appearance of solution
complies for reaction against H₂SO₄

官能团

carboxylic acid

SMILES字符串

OC(CC(O)(C(O)=O)CC(O)=O)=O.O

InChI

1S/C6H8O7.H2O/c7-3(8)1-6(13,5(11)12)2-4(9)10;/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12);1H2

InChI key

YASYEJJMZJALEJ-UHFFFAOYSA-N