柠檬酸 一水合物

产品名称

柠檬酸 一水合物, ACS reagent, ≥99.0%

InChI key

YASYEJJMZJALEJ-UHFFFAOYSA-N

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

SMILES string

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

grade

ACS reagent

assay

≥99.0%

form

powder

impurities

Substances carbonizable by hot sulfuric acid, passes test
≤0.005% Insoluble matter

ign. residue

≤0.02%

Quality Level

200

pH

(1.8 at 50 g/l at 20 °C)

pKa 

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

solubility

H₂O: soluble 54 % (w/w) at 10 °C (Citric acid in water)
H₂O: 59.2 % (w/w) at 20 °C (Citric acid in water)
H₂O: 84.0 % (w/w) at 100 °C (Citric acid in water)

anion traces

chloride (Cl^-): ≤0.001%
oxalate (C₂O₄^2-): passes test (limit about 0.05%)
phosphate (PO₄^3-): ≤0.001%
sulfate (SO₄^2-): ≤0.002%

cation traces

Fe: ≤3 ppm
Pb: ≤2 ppm

functional group

carboxylic acid