Potassium iodide potassium iodate solution

Beijing Huakesheng Fine Chemical Products Trading Co., LtdPotassium iodide potassium iodate solutionPotassium iodide is an inorganic compound with the chemical formula KI. It is a colorless or white crystal, odorless, and has a strong bitter and salty taste. As a medicinal agent, add an appropriate amount to table salt. Chinese name: Potassium iodide [8]

Foreign name: Potassium Iodide [8]

Chemical formula KI

Molecular weight 166.003 [8]

CAS login number 7681-11-0 [8]

EINECS login number 231-659-4

Melting point 680 ℃ [8]

Boiling point 1345 ℃ [7]

Water soluble and easily soluble

Density 3.13 g/cm3

Appearance: Colorless or white crystals

Safety description S26; S24/25; S45; S36/37/39; S53 [8]

Hazard symbol C [8]

Hazard Description R36/37/38 [8]

UN Dangerous Goods Number 2056 [8]

Physicochemical properties

physical properties

Colorless or white crystalline powder, density 3.13g/cm3, melting point 680 ℃ [8], boiling point 1345 ℃, easily soluble in water and ethanol. The aqueous solution darkens upon exposure to light and releases iodine.

chemical property

It can undergo chemical reactions with many substances, all of which are carried out through the I - in KI. The radius of I - in halide ions makes it easy for I - to form complexes with transition metal ions and d-region metal ions; The reducibility of I - is stronger than that of Br - and Cl -, and it is easily oxidized to elemental I2; The solubility of iodides is similar to that of chlorides and bromides. Iodides of Ag+, Cu+, Hg2+, and Pb2+are difficult to dissolve, and the precipitate is mostly colored. Analysis method:

The silver content method is an analytical method that uses AgNO3 as a titrant to determine the formation of insoluble silver salt drugs with Ag. According to the different indicators used to determine the endpoint, there are usually three measurement methods, namely potassium chromate indicator method (Mohr method), ferric ammonium sulfate indicator method (Volhard method), and adsorption indicator method (Fajans method). The adsorption indicator method is widely used in drug analysis, such as the determination of drugs such as sodium chloride and ammonium cyanide. [5]

1. In a solution with pH=4-7, titrate with potassium chromate as an indicator.

2. Reagent: Potassium Chromate Saturated Solution; 0.1mol/L standard titration solution. [6]

3. Analysis method: Take 1mL of the test solution into a 250mL conical flask, add 80mL of water and 5 drops of saturated potassium chromate, titrate with 0.1mol/L standard titration solution until the precipitate turns light red as the endpoint, and calculate the mass concentration of: ρ KI=cV x166 [6]

The concentration of standard titration solution c in the formula (mol/L) [6]

V - Volume of standard titration solution consumed (mL); [6]

166- Relative molecular weight (KI).Potassium iodide potassium iodate solution

Security terminology

S17：Keep away from combustible material.

Stay away from flammable materials.

S23：Do not breathe gas/fumes/vapour/spray.

Do not breathe gas/smoke/vapor/spray.

S24/25：Avoid. contact with skin and eyes.

Avoid skin and eye contact.

S26：In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

Immediately rinse with plenty of water and seek medical advice after eye contact.

S37/39：Wear suitable gloves and eye/face protection.

Wear appropriate gloves and eye/face protection.