MilliporeSigma
All Photos(3)

248649

Sigma-Aldrich

Hydriodic acid

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

Sign Into View Organizational & Contract Pricing

Select a Size

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

Looking for similar products? Visit Product Comparison Guide

Compare Similar Items

View Full Comparison

Show Differences

1 of 4

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


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’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).

Example:

T1503
Product Number
-
25G
Pack Size/Quantity

Additional examples:

705578-5MG-PW

PL860-CGA/SHF-1EA

MMYOMAG-74K-13

1000309185

enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Customers Also Viewed

Slide 1 of 7

1 of 7

Hydroiodic acid 67% for analysis EMSURE®

Supelco

1.00345

Hydroiodic acid 67%

2-Iodopropane contains copper as stabilizer, 99%

Sigma-Aldrich

148938

2-Iodopropane

Adipic acid 99%

Sigma-Aldrich

A26357

Adipic acid

Hydrobromic acid ACS reagent, 48%

Sigma-Aldrich

244260

Hydrobromic acid

Melamine 99%

Sigma-Aldrich

M2659

Melamine

Siegfried Eigler et al.
Chemical communications (Cambridge, England), 49(67), 7391-7393 (2013-07-19)
The efficiency of reducing agents for the reduction of graphene oxide (GO) could be probed by scanning Raman spectroscopy. A film of graphene flakes derived from GO was probed to be graphene like. We also focus on the surface quality
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)
Efficient reduction of polycyclic quinones, hydroquinones, and phenols with hydriodic acid.
Konieczny M and Harvey RG.
The Journal of Organic Chemistry, 44(26), 4813-4816 (1979)
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
S Ito et al.
Pigment cell research, 11(2), 120-126 (1998-05-19)
Melanocytes produce two chemically distinct types of melanin pigments, eumelanins and pheomelanins. These pigments can be quantitatively analyzed by acidic KMnO4 oxidation or reductive hydrolysis with hydriodic acid (HI) to form pyrrole-2,3,5-tricarboxylic acid (PTCA) or aminohydroxyphenylalanine (AHP), respectively. Dark brown

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service