Skip to Content
Merck

30315-M

Potassium iodide

puriss. p.a., reag. ISO, reag. Ph. Eur., ≥99.0%

Sign In to View Organizational & Contract Pricing.

Select a Size

About This Item

Linear Formula:
KI
CAS Number:
7681-11-0
Molecular Weight:
166.00
NACRES:
NA.21
PubChem Substance ID:
329753460
UNSPSC Code:
12352302
EC Number:
231-659-4
MDL number:
MFCD00011405
Assay:
≥99.0%, 99.0-100.5% (calc. to the dried substance)
Form:
crystalline
Solubility:
water: complete (ca.1,430 g/l at 25 °C (77 °F))

Key Documents

View All Documentation
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist

InChI

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

InChI key

NLKNQRATVPKPDG-UHFFFAOYSA-M

SMILES string

[K+].[I-]

agency

reag. ISO, reag. Ph. Eur.

vapor pressure

1 mmHg ( 745 °C)

grade

puriss. p.a.

assay

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

form

crystalline

impurities

Reducing substances, complies, ≤0.0005% heavy metals (as Pb), ≤0.005% thiosulfate (S2O3), ≤0.02% free alkali (as KOH), ≤10 ppm total nitrogen (N)

loss

≤0.2% loss on drying, 105 °C

pH

6-8 (20 °C, 5%)

mp

681 °C (lit.)

Quality Level

100

solubility

water: complete (ca.1,430 g/l at 25 °C (77 °F))

anion traces

bromide, chloride (as Cl-): ≤100 ppm, iodate (IO3-): ≤2 ppm, phosphate (PO43-): ≤10 ppm, sulfate (SO42-): ≤10 ppm

cation traces

As: ≤0.00001%, Ba: ≤0.002%, Ca: ≤0.001%, Fe: ≤0.0003%, Mg: ≤0.001%, Na: ≤0.03%

Looking for similar products? Visit Product Comparison Guide

Application

Potassium iodide is used:
  • As a solid base catalyst loaded with alumina for transesterification of soybean oil with methanol.
  • As a iodide source in the solvothermal synthesis of BiOI (bismuth oxyiodide) microspheres using ethylene glycol solvent.
  • In the synthesis of RGO (reduced graphene oxide) from GO (graphite oxide) in presence of HCl–KI mixture.

General description

Potassium iodide (KI) is an inorganic potassium salt. It is used as an iodide ion source for nucleophilic displacement reactions and acts as a mediator during the electrochemical oxidations of aldehydes. In presence of an acid, KI cleaves some ethers. KI reacts with sulfonyl chlorides to produce symmetrical thiosulfonic S-esters. In the presence of oxidizing agents, KI iodinates aromatic compounds and organothallium compounds.

pictograms

Health hazard
GHS08

signalword

Danger

hcodes

H372

Hazard Classifications

STOT RE 1 Oral

target_organs

Thyroid

Storage Class

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
STBK6467
STBG8319
STBK6466
STBK6241
STBK5500

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

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