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345245

Sigma-Aldrich

Phosphoric acid

greener alternative

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

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
466123695017438081
Phosphoric acid 85 wt. % in H2O, 99.99% trace metals basis

Sigma-Aldrich

345245

Phosphoric acid

Phosphoric acid crystalline, ≥99.999% trace metals basis

Sigma-Aldrich

466123

Phosphoric acid

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

Sigma-Aldrich

695017

Phosphoric acid

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

Sigma-Aldrich

438081

Phosphoric acid

assay

99.99% trace metals basis

assay

≥99.999% trace metals basis

assay

≥85% H3PO4 basis (by NaOH, titration)

assay

≥85% (with NaOH, titration)

form

liquid

form

crystalline

form

liquid

form

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.), 41-44 °C

mp

~40 °C (lit.)

mp

~40 °C (lit.)

application(s)

battery manufacturing

application(s)

-

application(s)

-

application(s)

-

Quality Level

200

Quality Level

200

Quality Level

200

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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