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248649

Sigma-Aldrich

Hydriodic acid

contains ≤1.5% hypophosphorous acid as stabilizer, ACS reagent, ≥47.0%

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Synonym(s):
Hydriotic acid
Empirical Formula (Hill Notation):
HI
CAS Number:
Molecular Weight:
127.91
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent

Quality Level

form

liquid

contains

≤1.5% hypophosphorous acid as stabilizer

concentration

≥47.0%

bp

127 °C (lit.)

density

1.5 g/mL at 25 °C

anion traces

bromide, chloride (as Cl-): ≤0.05%
sulfate (SO42-): ≤0.005%

cation traces

Fe: ≤0.001%
heavy metals: ≤0.001%

storage temp.

2-8°C

SMILES string

I

InChI

1S/HI/h1H

InChI key

XMBWDFGMSWQBCA-UHFFFAOYSA-N

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This Item
39809858160210021
Hydriodic acid contains ≤1.5% hypophosphorous acid as stabilizer, ACS reagent, ≥47.0%

Sigma-Aldrich

248649

Hydriodic acid

Essential Grade
Hydriodic acid contains no stabilizer, ACS reagent, 55%

Sigma-Aldrich

398098

Hydriodic acid

Essential Grade
Hydriodic acid puriss. p.a., ≥67% (T)

Sigma-Aldrich

58160

Hydriodic acid

-
Hydriodic acid 57 wt. % in H2O, distilled, stabilized, 99.95%

Sigma-Aldrich

210021

Hydriodic acid

-
form

liquid

form

liquid

form

liquid

form

liquid

concentration

≥47.0%

concentration

-

concentration

≥67% (T)

concentration

57 wt. % in H2O

bp

127 °C (lit.)

bp

127 °C (lit.)

bp

127 °C (lit.)

bp

127 °C (lit.)

density

1.5 g/mL at 25 °C

density

1.7 g/mL at 25 °C

density

1.96 g/mL at 20 °C

density

1.701 g/mL at 25 °C

anion traces

bromide, chloride (as Cl-): ≤0.05%, sulfate (SO42-): ≤0.005%

anion traces

bromide, chloride (as Cl-): ≤0.05%, phosphate (PO43-): ≤0.001%, sulfate (SO42-): ≤0.005%

anion traces

bromide, chloride (as Cl-): ≤200 mg/kg, sulfate (SO42-): ≤20 mg/kg

anion traces

-

Application

Hydriodic acid is a solution of hydrogen iodide in water. It is a strong acid. It is commonly used as a reagent in various reactions such as:
  • electrophilic hydriodination of alkenes and alkynes
  • cleavage of epoxides, ethers, and acetals; conversion of alcohols to iodides   
  • reducing agent for many groups including quinones, α-diketones, α-ketols, α-halo ketones, α-diazo ketones, and sulfoxides      
  • reductive cyclization of keto acids

Hydriodic acid (hypophosphorus acid as a stabilizer) can be used for the fabrication of benzylammonium hybrid layered metal-halide perovskites for spintronic and nonlinear optical applications

Pictograms

CorrosionEnvironment

Signal Word

Danger

Hazard Statements

Hazard Classifications

Aquatic Chronic 2 - 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


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