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Merck

695017

Phosphoric acid

greener alternative

ACS reagent, ≥85 wt. % in H2O

Synonym(s):

Orthophosphoric acid

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About This Item

Linear Formula:
H3PO4
CAS Number:
7664-38-2
Molecular Weight:
98.00
UNSPSC Code:
12352106
NACRES:
NA.21
PubChem Substance ID:
329761708
EC Number:
231-633-2
Beilstein/REAXYS Number:
1921286
MDL number:
MFCD00011340
eCl@ss:
38070202
Assay:
≥85% H3PO4 basis (by NaOH, titration)
Concentration:
≥85 wt. % in H2O
Form:
liquid
Grade:
ACS reagent

Key Documents

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InChI key

NBIIXXVUZAFLBC-UHFFFAOYSA-N

InChI

1S/H3O4P/c1-5(2,3)4/h(H3,1,2,3,4)

grade

ACS reagent

vapor density

3.4 (vs air)

vapor pressure

2.2 mmHg ( 20 °C), 5 mmHg ( 25 °C)

Quality Level

200

Gene Information

human ... SRC(6714)

SMILES string

OP(O)(O)=O

assay

≥85% H3PO4 basis (by NaOH, titration)

form

liquid

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concentration

≥85 wt. % in H2O

technique(s)

NMR: suitable

impurities

reducing substances, passes test, ≤0.001% volatile acids (as CH3COOH)

color

APHA: ≤10

bp

158 °C (lit.)

mp

~40 °C (lit.)

solubility

water: soluble (98 g/l at 20 °C)

density

1.685 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤3 ppm, nitrate (NO3-): ≤5 ppm, sulfate (SO42-): ≤0.003%

cation traces

As: ≤1 ppm, Ca: ≤0.002%, Fe: ≤0.003%, K: ≤0.005%, Mg: ≤0.02%, Mn: ≤0.5 ppm, Na: ≤0.025%, Sb: ≤0.002%, heavy metals: ≤0.001% (by ICP)

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Enabling

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General description

Phosphoric acid (H3PO4) is useful in industry for treating the metal surfaces to obtain better adhesion of paint and resin coatings.
We are committed to bringing you Greener Alternative Products that adhere to one of the four categories of Greener Alternatives. Phosphoric acid is an enabling product which enhances the sustainability of lithium-ion batteries by improving the ionic conductivity of solid-state electrolytes through water-mediated synthesis. This process reduces reliance on harmful solvents, minimizes waste, and promotes the formation of structures that facilitate lithium ion transport, demonstrating a commitment to greener chemistry and efficient energy storage solutions. Click here for more information.

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.

Other Notes

Concentrated phosphoric acid is approx. 85% H3PO4 (aqueous).

pictograms

CorrosionExclamation mark
GHS05,GHS07

signalword

Danger

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B

Storage Class

8B - Non-combustible corrosive hazardous materials

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

Substances Subject to be Indicated Names

ishl_indicated

Substances Subject to be Notified Names

ishl_notified

695017-500ML:4548173925950 + 695017-100ML-PW: + 695017-2.5L: + 695017-BULK: + 695017-201L: + 695017-12X100ML: + 695017-12X100ML-PW: + 695017-H: + 695017-201L-MULTI: + 695017-500ML-PW: + 695017-2.5L-PW: + 695017-VAR: + 695017-100ML:4548173925943

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A simple method of increasing the adhesion of acrylic filling materials to enamel surfaces.
Buonocore MG.
Journal of Dental Research, 34(6), 849-853 (1955)
FTIR and 31 P-NMR spectroscopic analyses of surface species in phosphate-catalyzed lactic acid conversion.
Gunter GC, et al.
J. Catal., 164(1), 207-219 (1996)
Internal versus external surface active sites in ZSM-5 zeolite: Part 1. Fries rearrangement catalyzed by modified and unmodified H3PO4/ZSM-5.
Ghiaci M, et al.
Applied Catalysis A: General, 298, 32-39 (2006)
D S Marinier et al.
Journal of lipid research, 29(9), 1237-1243 (1988-09-01)
In order to study the lipid composition of human white matter, we have developed a 31P NMR spectroscopy method, which allows the determination and quantitation of the main phospholipids found in biological membranes. The technique is based upon the use
P Meneses et al.
Journal of lipid research, 29(5), 679-689 (1988-05-01)
The common phospholipids from biological sources were quantitated using phosphorus-31 nuclear magnetic resonance (NMR) spectroscopy in conjunction with an analytical reagent composed of two parts: 1) 2 ml of reagent chloroform in which was dissolved 0.01-100 mg of crude tissue
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