Citric Acid 99.5% ACS Reagent 12 Kg
- CAS Number 77-92-9
- Linear Formula HOC(COOH)(CH2COOH)2
- Molecular Weight 192.12
- Beilstein/REAXYS Number 782061
- EC Number 201-069-1
- MDL number MFCD00011669
- eCl@ss 39021801
- PubChem Substance ID 24855122
| Quality Level | 200 |
| Grade | ACS reagent |
| InChI Key | KRKNYBCHXYNGOX-UHFFFAOYSA-N |
| Assay | ≥99.5% |
| 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 (C2O42-): passes test (limit about 0.003%) phosphate (PO43-): ≤0.001% sulfate (SO42-): ≤0.002% |
| cation traces | Fe: ≤3 ppm Pb: ≤2 ppm |
| Gene Information | human … SRC(6714) |
General description
Citric acid is an organic acid commonly used as a chelating agent, a buffering agent, for pH adjustment and derivatization.
Application
Citric acid has been used to prepare:
- Phosphate citrate buffer for use in enzyme-linked immunosorbent assay.
- Citrate-stabilized ceria aqueous sol, which was employed in the synthesis of cerium oxide nanoparticles.
- Citric acid-Na2HPO4-buffered stock solution for use in the determination of fecal urease activity.
- Anticoagulant citrate dextrose solution A (ACD-A), which is employed during the isolation of blood-derived endothelial progenitor cells.
Citric acid has also been used:
- In a novel process which allows controlling of the particle size during the synthesis of palladium cuboctahedrons.
- To prepare citric acid-derived carbon nanodots (CNDs) by bottom-up carbonization method.[5]
- As a bi-component chelating agent for the synthesis of Li4Ti5O12 (lithium titanate oxide) by a novel sol–gel method.
Safety Information
Signal word Warning
Hazard statements H319
Precautionary statements P264-P280-P305 + P351 + P338-P337 + P313
Personal Protective Equipment dust mask type N95 (US), Eyeshields, Gloves
RIDADR NONH for all modes of transport
WGK Germany 1RTECS GE7350000





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