Phosphoric acid
SIGALD/695017 - ACS reagent, ≥85 wt. % in H2O
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
| anion traces | chloride (Cl-): ≤3 ppm |
| nitrate (NO3-): ≤5 ppm | |
| sulfate (SO42-): ≤0.003% | |
| assay | ≥85% H3PO4 basis (by NaOH, titration) |
| bp | 158 °C (lit.) |
| cation traces | As: ≤1 ppm |
| Ca: ≤0.002% | |
| Fe: ≤0.003% | |
| heavy metals: ≤0.001% (by ICP) | |
| K: ≤0.005% | |
| Mg: ≤0.02% | |
| Mn: ≤0.5 ppm | |
| Na: ≤0.025% | |
| Sb: ≤0.002% | |
| color | APHA: ≤10 |
| concentration | ≥85 wt. % in H2O |
| density | 1.685 g/mL at 25 °C (lit.) |
| form | liquid |
| grade | ACS reagent |
| impurities | reducing substances, passes test |
| ≤0.001% volatile acids (as CH3COOH) | |
| InChI | 1S/H3O4P/c1-5(2,3)4/h(H3, |
| InChI key | NBIIXXVUZAFLBC-UHFFFAOYSA |
| mp | ~40 °C (lit.) |
| Quality Level | 200  |
| SMILES string | OP(O)(O)=O |
| technique(s) | NMR: suitable |
| vapor density | 3.4 (vs air) |
| vapor pressure | 2.2 mmHg ( 20 °C) |
| 5 mmHg ( 25 °C) |
| Application: | Phosphoric acid may be employed as standard for the determination of phosphorus-31 nuclear magnetic resonance (31P NMR) chemical shifts of the common phospholipids. It may be employed in the following studies: • As external standard for the analysis of lipid composition of human white matter by 31P NMR spectroscopy. • As external standard during the acid-labile phosphorylation of histone H4 by 31P NMR spectroscopy. • As reference standard to investigate the surface species present on silica/alumina-supported sodium phosphates by pre- and postreaction MAS31P-NMR and FTIR spectroscopies. • As catalyst in the vapor-phase Fries rearrangement of phenylacetate at 623K over a series of surface modified and unmodified ZSM-5. |
| General description: | Phosphoric acid (H3PO4) is useful in industry for treating the metal surfaces to obtain better adhesion of paint and resin coatings. |
| Other Notes: | Concentrated phosphoric acid is approx. 85% H3PO4 (aqueous). |
| Packaging: | 100, 12×100, 500 mL in poly bottle |
| Packaging: | 2.5 L in poly bottle |
| 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% H3PO4 basis (by NaOH, titration) |
| bp | 158 °C (lit.) |
| mp | ~40 °C (lit.) |
| Density | 1.685 g/mL at 25 °C (lit.) |
| UNSPSC | 12352106 |