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345245

Sigma-Aldrich

Phosphoric acid

greener alternative

85 wt. % in H2O, 99.99% trace metals basis

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Synonym(s):
Orthophosphoric acid
Linear Formula:
H3PO4
CAS Number:
Molecular Weight:
98.00
Beilstein:
1921286
MDL number:
PubChem Substance ID:
NACRES:
NA.23

vapor density

3.4 (vs air)

Quality Level

vapor pressure

2.2 mmHg ( 20 °C)
5 mmHg ( 25 °C)

Assay

99.99% trace metals basis

form

liquid

greener alternative product characteristics

Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.

concentration

85 wt. % in H2O

bp

158 °C (lit.)

mp

~40 °C (lit.)

density

1.685 g/mL at 25 °C (lit.)

application(s)

battery manufacturing

greener alternative category

SMILES string

OP(O)(O)=O

InChI

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

InChI key

NBIIXXVUZAFLBC-UHFFFAOYSA-N

Gene Information

human ... SRC(6714)

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This Item
43808145228979617
Phosphoric acid 85 wt. % in H2O, 99.99% trace metals basis

Sigma-Aldrich

345245

Phosphoric acid

-
Phosphoric acid ACS reagent, ≥85 wt. % in H2O

Sigma-Aldrich

438081

Phosphoric acid

-
Phosphoric acid ≥85 wt. % in H2O, ≥99.999% trace metals basis

Sigma-Aldrich

452289

Phosphoric acid

-
Phosphoric acid BioUltra, ≥85% (T)

Sigma-Aldrich

79617

Phosphoric acid

Premium Grade
form

liquid

form

liquid

form

liquid

form

viscous liquid

bp

158 °C (lit.)

bp

158 °C (lit.)

bp

158 °C (lit.)

bp

158 °C (lit.)

mp

~40 °C (lit.)

mp

~40 °C (lit.)

mp

~40 °C (lit.)

mp

~40 °C (lit.)

application(s)

battery manufacturing

application(s)

-

application(s)

battery manufacturing

application(s)

-

Quality Level

200

Quality Level

200

Quality Level

100

Quality Level

200

General description

In aqueous solutions, phosphoric acid behaves as a triprotic acid. The triprotic acid has three ionizable hydrogen atoms, which are lost sequentially.
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.

Application

Industrially, phosphoric acid may be used in fertilizers, detergents, pharmaceuticals, water softeners.
Phosphoric acid (85 wt. % in H2O) can be used for a variety of applications, such as:
  • a medium for corrosion inhibition on mild steel
  • an activating agent in the preparation of activated carbon
  • enhancement of electrochemical performance for energy devices
  • in the development of polymeric membranes for proton exchange membrane based fuel cells

Phosphoric acid has been used as an acid solution for pH adjustment of the fermentation broth in a protocol for the acetone-butanol-ethanol (ABE) fermentation of sugars in a bioreactor.

Packaging

Packaged in clear glass bottles

Other Notes

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

Pictograms

CorrosionExclamation mark

Signal Word

Danger

Hazard Statements

Hazard Classifications

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

Storage Class Code

8B - Non-combustible, corrosive hazardous materials

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Preparation and characterization of activated carbon from bamboo by microwave-induced phosphoric acid activation
Liu Q, et al.
Industrial Crops and Products, 31(2), 233-238 (2010)
Production of an acetone-butanol-ethanol mixture from Clostridium acetobutylicum and its conversion to high-value biofuels.
Sreekumar S, et al.
Nature Protocols, 10(3), 528-537 (2015)
Physicochemical properties of phosphoric acid doped polybenzimidazole membranes for fuel cells
He R, et al.
Journal of Membrane Science , 277(1-2), 38-45 (2006)
Activation of graphene aerogel with phosphoric acid for enhanced electrocapacitive performance
Sun X, et al.
Carbon, 92, 1-10 (2015)
Proton-conducting membranes based on benzimidazole polymers for high-temperature PEM fuel cells. A chemical quest
Asensio JA, et al.
Chemical Society Reviews, 39(8), 3210-3239 (2010)

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