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Merck

248649

Hydriodic acid

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

Synonym(s):

Hydriotic acid

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About This Item

Empirical Formula (Hill Notation):
HI
CAS Number:
10034-85-2
Molecular Weight:
127.91
NACRES:
NA.21
PubChem Substance ID:
329752753
UNSPSC Code:
12352106
MDL number:
MFCD00011347
Concentration:
≥47.0%
Form:
liquid
Grade:
ACS reagent

Key Documents

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InChI

1S/HI/h1H

SMILES string

I

InChI key

XMBWDFGMSWQBCA-UHFFFAOYSA-N

grade

ACS reagent

form

liquid

contains

≤1.5% hypophosphorous acid as stabilizer

concentration

≥47.0%

Quality Level

200

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

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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
GHS05,GHS09

signalword

Danger

Hazard Classifications

Aquatic Chronic 2 - 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

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Certificates of Analysis (COA)

Lot/Batch Number
MKCX9802
MKCW2432
MKCK0311
SHBH5158V
SHBF1238V

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Siegfried Eigler et al.
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Viscosities of aqueous hydrochloric acid solutions, and densities and viscosities of aqueous hydroiodic acid solutions.
Nishikata E, et al.
Journal of Chemical and Engineering Data, 26(3), 254-256 (1981)
Relationships between circulating and intracellular thyroid hormones: physiological and clinical implications.
P R Larsen et al.
Endocrine reviews, 2(1), 87-102 (1981-01-01)
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Pigment cell & melanoma research, 22(4), 474-486 (2009-06-06)
Pheomelanogenesis is a complex pathway that starts with the oxidation of tyrosine (or DOPA, 3,4-dihydroxyphenylalanine) by tyrosinase in the presence of cysteine, which results in the production of 5-S-cysteinyldopa and its isomers. Beyond that step, relatively little has been clarified
Hailong Li et al.
Journal of agricultural and food chemistry, 60(21), 5307-5310 (2012-05-15)
The paper reports on a headspace gas chromatographic (HS-GC) method for the determination of methoxyl in lignin. The method involves the quantitive cleavage of methoxyl with hydroiodic acid (HI) to form methyl iodide in a closed headspace sample vial at
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