Citric acid

Product Name

Citric acid, anhydrous, free-flowing, Redi-Dri^™, ACS reagent, ≥99.5%

InChI key

KRKNYBCHXYNGOX-UHFFFAOYSA-N

InChI

1S/C6H8O7/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)

SMILES string

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

grade

ACS reagent
anhydrous

product line

Redi-Dri^™

assay

≥99.5%

form

crystals

quality

free-flowing

expl. lim.

8 %, 65 °F

impurities

Substances carbonizable by hot sulfuric acid, passes test

ign. residue

≤0.02%

pKa 

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

mp

153-159 °C (lit.)

anion traces

chloride (Cl^-): ≤0.001%
oxalate (C₂O₄^2-): passes test (limit about 0.003%)
phosphate (PO₄^3-): ≤0.001%
sulfate (SO₄^2-): ≤0.002%

cation traces

Fe: ≤3 ppm
Pb: ≤2 ppm

functional group

carboxylic acid
hydroxyl

Quality Level

200