MilliporeSigma
All Photos(5)

221945

Sigma-Aldrich

Potassium iodide

ACS reagent, ≥99.0%

Sign Into View Organizational & Contract Pricing

Select a Size

Linear Formula:
KI
CAS Number:
Molecular Weight:
166.00
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent

Quality Level

vapor pressure

1 mmHg ( 745 °C)

Assay

≥99.0%

form

crystals

impurities

≤0.001% N compounds
≤0.005% insolubles

loss

≤0.2% loss on drying

pH

6.0-9.2 (25 °C, 5%)

mp

681 °C (lit.)

anion traces

chloride, bromide (as Cl)-: ≤0.01%
iodate (IO3-): ≤3 ppm
phosphate (PO43-): ≤0.001%
sulfate (SO42-): ≤0.005%

cation traces

Ba: ≤0.002%
Ca: ≤0.002%
Fe: ≤3 ppm
Mg: ≤0.001%
Na: ≤0.005%
heavy metals (as Pb): ≤5 ppm

SMILES string

[K+].[I-]

InChI

1S/HI.K/h1H;/q;+1/p-1

InChI key

NLKNQRATVPKPDG-UHFFFAOYSA-M

Looking for similar products? Visit Product Comparison Guide

Related Categories

Compare Similar Items

View Full Comparison

Show Differences

1 of 4

This Item
30315PHR1360793582
Potassium iodide ACS reagent, ≥99.0%

Sigma-Aldrich

221945

Potassium iodide

Essential Grade
Potassium iodide puriss. p.a., reag. ISO, reag. Ph. Eur., ≥99.0%

Sigma-Aldrich

30315

Potassium iodide

-
Potassium Iodide Pharmaceutical Secondary Standard; Certified Reference Material

Supelco

PHR1360

Potassium Iodide

-
Potassium iodide anhydrous, free-flowing, Redi-Dri™, ReagentPlus®, 99%

Sigma-Aldrich

793582

Potassium iodide

-
vapor pressure

1 mmHg ( 745 °C)

vapor pressure

1 mmHg ( 745 °C)

vapor pressure

1 mmHg ( 745 °C)

vapor pressure

1 mmHg ( 745 °C)

assay

≥99.0%

assay

≥99.0%, 99.0-100.5% (calc. to the dried substance)

assay

-

assay

99%

form

crystals

form

solid

form

-

form

powder or crystals

impurities

≤0.001% N compounds, ≤0.005% insolubles

impurities

≤0.0005% heavy metals (as Pb), ≤0.001% total nitrogen (N), ≤0.005% thiosulfate (S2O3), ≤0.02% free alkali (as KOH)

impurities

-

impurities

-

pH

6.0-9.2 (25 °C, 5%)

pH

6.0-8.0 (20 °C, 5%)

pH

-

pH

~6.9 (20 °C, 50 g/L)

General description

Potassium iodide is a water soluble inorganic salt that can be prepared by reacting hydrogen iodide and potassium bicarbonate.

Application

Potassium iodide may be used as a catalyst in the following processes: Conversion of aromatic primary amines to the corresponding nitro compounds in the presence of tert-butyl hydroperoxide as oxidant. Conversion of aryl halide to aryl iodides in the presence of nickel catalysts. Preparation of sulfonated oxindoles from activated alkenes and sulfonylhydrazides in water and in the presence of 8-crown-6 and tert-butyl hydroperoxide.

Legal Information

Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

Pictograms

Health hazard

Signal Word

Danger

Hazard Statements

Precautionary Statements

Hazard Classifications

STOT RE 1 Oral

Target Organs

Thyroid

Storage Class Code

6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

WGK

WGK 3

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 4

1 of 4

Iodine ACS reagent, ≥99.8%, solid

Sigma-Aldrich

207772

Iodine

Potassium iodate ACS reagent, 99.5%

Sigma-Aldrich

215929

Potassium iodate

Potassium iodide 99.995 Suprapur®

Supelco

1.05044

Potassium iodide

Potassium iodide crystals, Meets ACS Specifications, Meets Reagent Specifications for testing USP/NF monographs GR ACS

Supelco

PX1505

Potassium iodide

Selective Oxidation of Aromatic Amines to Nitro Derivatives using Potassium Iodide-tert-Butyl Hydroperoxide Catalytic System
Reddy KR, et al
Advanced Synthesis & Catalysis, 351(1-2), 93-96 (2009)
Synthesis of Aryl Iodides from Aryl Halides and Potassium Iodide by Means of Nickel Catalyst
Takagi K, et al
Chemistry Letters (Jpn), 7(2), 191-192 (1978)
Synthesis of sulfonated oxindoles by potassium iodide catalyzed arylsulfonylation of activated alkenes with sulfonylhydrazides in water.
<BIG>Li X, et al. </BIG>
The Journal of Organic Chemistry, 78(14), 7343-7348 (2013)
Eagleson M.
Concise Encyclopedia Chemistry, 889-889 (1994)
H B Li et al.
Journal of chromatography. A, 918(2), 335-339 (2001-06-16)
A novel method for the determination of iodide by size exclusion chromatography was established. The method was simple and highly sensitive with good precision. Iodide was converted to iodine, then sequestered with starch, and separated from the matrix using a

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