Phosphoric acid
SIGALD/438081 - 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% (with 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 |
| greener alternative category | Enabling  , |
| greener alternative product characteristics | Design for Energy Efficiency Learn more about the Principles of Green Chemistry . |
| 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.) |
| pH | <1 (100%) |
| Quality Level | 200 |
| SMILES string | OP(O)(O)=O |
| sustainability | Greener Alternative Product |
| 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. • As an eco-friendly reagent for the removal of protecting groups like tert-butyl carbamates, tert-butyl esters and tert-butyl ethers. |
| General description: | Phosphoric acid (H3PO4), also known as orthophosphoric acid, is an inorganic acid. It has a wide range of industrial applications such as an intermediate to produce animal feedstock, to prepare stock solutions for workup procedures and to treat the metal surfaces for better adhesion of paint and resin coatings. In the food industry it is used as a preservative, an acidulant and flavor enhancer. |
| General description: | We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has been enhanced for energy efficiency. Find details here . |
| Other Notes: | Concentrated phosphoric acid is approx. 85% H3PO4 (aqueous). |
| Packaging: | 2.5, 6×2.5 L in PVC-coated bottle |
| Packaging: | 500, 6×500 mL in PVC-coated 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% (with NaOH, titration) |
| bp | 158 °C (lit.) |
| mp | ~40 °C (lit.) |
| Density | 1.685 g/mL at 25 °C (lit.) |
| UNSPSC | 12352106 |