Phosphoric acid
SIGMA/79617 - BioUltra, ≥85% (T)
Synonym: Orthophosphoric acid
CAS Number: 7664-38-2
Empirical Formula (Hill Notation): H3O4P
Molecular Weight: 98.00
EC Number: 231-633-2
MDL Number: MFCD00011340
Linear Formula: H3PO4
Product Type: Chemical
| λ | 1 M in H2O |
| anion traces | chloride (Cl-): ≤2 mg/kg |
| fluoride (F-): ≤1 mg/kg | |
| nitrate (NO3-): ≤5 mg/kg | |
| phosphite, hypophosphite (as H3PO3): ≤50 mg/kg | |
| sulfate (SO42-): ≤30 mg/kg | |
| assay | ≥85% (T) |
| bp | 158 °C (lit.) |
| cation traces | Ag: ≤1 mg/kg |
| Al: ≤1 mg/kg | |
| As: ≤0.5 mg/kg | |
| Ba: ≤1 mg/kg | |
| Bi: ≤1 mg/kg | |
| Ca: ≤10 mg/kg | |
| Cd: ≤1 mg/kg | |
| Co: ≤1 mg/kg | |
| Cr: ≤1 mg/kg | |
| Cu: ≤1 mg/kg | |
| Fe: ≤10 mg/kg | |
| K: ≤5 mg/kg | |
| Li: ≤1 mg/kg | |
| Mg: ≤1 mg/kg | |
| Mn: ≤1 mg/kg | |
| Mo: ≤1 mg/kg | |
| Na: ≤20 mg/kg | |
| Ni: ≤1 mg/kg | |
| Pb: ≤1 mg/kg | |
| Sb: ≤2 mg/kg | |
| Sr: ≤1 mg/kg | |
| Tl: ≤1 mg/kg | |
| Zn: ≤1 mg/kg | |
| density | 1.685 g/mL at 25 °C (lit.) |
| form | viscous liquid |
| impurities | insoluble matter, passes filter test |
| ≤0.001% KMnO4-reducing matter (as O) | |
| ≤0.001% volatile acids (as CH3COOH) | |
| InChI | 1S/H3O4P/c1-5(2,3)4/h(H3, |
| InChI key | NBIIXXVUZAFLBC-UHFFFAOYSA |
| mp | ~40 °C (lit.) |
| product line | BioUltra |
| Quality Level | 200  |
| refractive index | n |
| SMILES string | OP(O)(O)=O |
| solubility | H2O: 1 M at 20 °C, clear, colorless |
| UV absorption | λ: 260 nm Amax: ≤0.05 |
| λ: 280 nm Amax: ≤0.04 | |
| vapor density | 3.4 (vs air) |
| vapor pressure | 2.2 mmHg ( 20 °C) |
| 5 mmHg ( 25 °C) |
| Application: | Phosphoric acid has been used in the preparation of anolyte, a constituent of the capillary isoelectric focusing (CIEF) solutions. It has also been used as a chemical oxidation reagent in flow injection analysis-chemical oxidation-isotope ratio mass spectrometry (FIA-CO-IRMS). |
| Caution: | product may become solid; becomes liquid on heating to 50°C. |
| Other Notes: | Concentrated phosphoric acid is approx. 85% H3PO4 (aqueous). |
| Symbol |   GHS05,GHS07 |
| Signal word | Danger |
| Hazard statements | H290 - H302 - H314 |
| Precautionary statements | P234 - P270 - P280 - P301 + P312 - P303 + P361 + P353 - P305 + P351 + P338 |
| Hazard Codes | C |
| Risk Statements | 34 |
| Safety Statements | 26-45 |
| RIDADR | UN 1805 8 / PGIII |
| WGK Germany | WGK 1 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | ≥85% (T) |
| bp | 158 °C (lit.) |
| mp | ~40 °C (lit.) |
| Density | 1.685 g/mL at 25 °C (lit.) |
| Refractive Index | n |
| UNSPSC | 12352301 |