Citric acid
SIGMA/27487 - BioUltra, anhydrous, ≥99.5% (T)
CAS Number: 77-92-9
Empirical Formula (Hill Notation): C6H8O7
Molecular Weight: 192.12
EC Number: 201-069-1
MDL Number: MFCD00011669
Linear Formula: HOC(COOH)(CH2COOH)2
Product Type: Chemical
| λmax | 260 nm (Amax: ≤0.20) |
| 280 nm (Amax: ≤0.10) | |
| λ | 1 M in H2O |
| anion traces | chloride (Cl-): ≤5 mg/kg |
| oxalate (C2O42-): ≤0.05% | |
| phosphate (PO43-): ≤5 mg/kg | |
| sulfate (SO42-): ≤20 mg/kg | |
| tartrate (C4H4O62-): ≤0.20% | |
| assay | ≥99.5% (T) |
| cation traces | Al: ≤5 mg/kg |
| As: ≤0.1 mg/kg | |
| Ba: ≤5 mg/kg | |
| Bi: ≤5 mg/kg | |
| Ca: ≤10 mg/kg | |
| Cd: ≤5 mg/kg | |
| Co: ≤5 mg/kg | |
| Cr: ≤5 mg/kg | |
| Cu: ≤5 mg/kg | |
| Fe: ≤5 mg/kg | |
| K: ≤50 mg/kg | |
| Li: ≤5 mg/kg | |
| Mg: ≤5 mg/kg | |
| Mn: ≤5 mg/kg | |
| Mo: ≤5 mg/kg | |
| Na: ≤50 mg/kg | |
| Ni: ≤5 mg/kg | |
| Pb: ≤5 mg/kg | |
| Sr: ≤5 mg/kg | |
| Zn: ≤5 mg/kg | |
| expl. lim. | 8 %, 65 °F |
| form | powder or crystals |
| ign. residue | ≤0.05% (as SO4) |
| impurities | insoluble matter, passes filter test |
| InChI | 1S/C6H8O7/c7-3(8)1-6(13,5 |
| InChI key | KRKNYBCHXYNGOX-UHFFFAOYSA |
| loss | ≤0.5% loss on drying, 110 °C |
| mp | 153-159 °C (lit.) |
| pH | 1.0-2.0 (25 °C, 1 M in H2O) |
| pKa | (1) 3.13, (2) 4.76, (3) 6.4 |
| product line | BioUltra |
| Quality Level | 200  |
| SMILES string | OC(=O)CC(O)(CC(O)=O)C(O)= |
| solubility | H2O: 1 M at 20 °C, clear, colorless |
| technique(s) | cell culture | hybridoma: suitable |
| UV absorption | λ: 260 nm Amax: 0.20 |
| λ: 280 nm Amax: 0.10 |
).