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79617

Sigma-Aldrich

Phosphoric acid

BioUltra, ≥85% (T)

Synonym(s):

Orthophosphoric acid

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About This Item

Linear Formula:
H3PO4
CAS Number:
7664-38-2
Molecular Weight:
98.00
Beilstein:
1921286
EC Number:
231-633-2
MDL number:
MFCD00011340
UNSPSC Code:
12352301
PubChem Substance ID:
57652809
NACRES:
NA.26

vapor density

3.4 (vs air)

vapor pressure

2.2 mmHg ( 20 °C)
5 mmHg ( 25 °C)

product line

BioUltra

Assay

≥85% (T)

form

viscous liquid

impurities

insoluble matter, passes filter test
≤0.001% KMnO4-reducing matter (as O)
≤0.001% volatile acids (as CH3COOH)

refractive index

n20/D 1.433

bp

158 °C (lit.)

mp

~40 °C (lit.)

solubility

H2O: 1 M at 20 °C, clear, colorless

density

1.685 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤2 mg/kg
fluoride (F-): ≤1 mg/kg
nitrate (NO3-): ≤5 mg/kg
phosphite, hypophosphite (as H3PO3): ≤50 mg/kg
sulfate (SO42-): ≤30 mg/kg

cation traces

Ag: ≤1 mg/kg
Al: ≤1 mg/kg
As: ≤0.5 mg/kg
Ba: ≤1 mg/kg
Bi: ≤1 mg/kg
Ca: ≤10 mg/kg
Cd: ≤1 mg/kg
Co: ≤1 mg/kg
Cr: ≤1 mg/kg
Cu: ≤1 mg/kg
Fe: ≤10 mg/kg
K: ≤5 mg/kg
Li: ≤1 mg/kg
Mg: ≤1 mg/kg
Mn: ≤1 mg/kg
Mo: ≤1 mg/kg
Na: ≤20 mg/kg
Ni: ≤1 mg/kg
Pb: ≤1 mg/kg
Sb: ≤2 mg/kg
Sr: ≤1 mg/kg
Tl: ≤1 mg/kg
Zn: ≤1 mg/kg

SMILES string

OP(O)(O)=O

λ

1 M in H2O

UV absorption

λ: 260 nm Amax: ≤0.05
λ: 280 nm Amax: ≤0.04

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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Application

Phosphoric acid has been used in the preparation of anolyte, a constituent of the capillary isoelectric focusing (CIEF) solutions. It has also been used as a chemical oxidation reagent in flow injection analysis-chemical oxidation-isotope ratio mass spectrometry (FIA-CO-IRMS).

Other Notes

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

Caution

product may become solid; becomes liquid on heating to 50°C.

Pictograms

CorrosionExclamation mark
GHS05,GHS07

Signal Word

Danger

Hazard Statements

H290,H302,H314

Hazard Classifications

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

Storage Class Code

8A - 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

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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