Iodine, Iodine crystals, Iodine solution, Iodine Crystals or Liquid,  7553-56-2, 12190-71-5

Iodine, Iodine crystals, Iodine solution, Iodine Crystals or Liquid,  7553-56-2, 12190-71-5

Iodine

CAS: 7553-56-2;12190-71-5

Molecular Formula: I2

Names and Identifiers

Physico-chemical Properties

Risk and Safety

Hazard Symbols	Xn - Harmful N - Dangerous for the environment
Risk Codes	R20/21 - Harmful by inhalation and in contact with skin. R50 - Very Toxic to aquatic organisms
Safety Description	S23 - Do not breathe vapour. S25 - Avoid contact with eyes. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets.
UN IDs	UN 1759/1760

Upstream Downstream Industry

Nature

blue-black phosphorus crystals or platelets with metallic luster. It is brittle and easy to sublimate, and its vapor is purple at room temperature, with spicy and stimulating smell. Melting point 113. 60 °c; Boiling point 185. 24 °c; d (solid, 25 °c) 4.93,d (liquid 120 °c) 960. Slightly soluble in water, soluble in chloroform, ethanol, benzene, carbon disulfide, carbon tetrachloride. Strong oxidant. Exposure to ammonia and acetylene can cause explosion. A strong reaction can occur with the reducing agent. Ignition is caused by contact with bromine pentafluoride, chlorine trifluoride, fluorine, metal powder, water, phosphorus, etc. A vigorous reaction occurred with acetaldehyde. Corrosive. By high heat decomposition, release of toxic smoke.

Preparation Method

1. ion exchange method: the kelp was soaked twice with 13-15 times the amount of water, and the iodine content of the soaking solution was 0.5-0.55g/L. Because the soaking solution contains a lot of fucoidan and other impurities, need to add alkali to remove, add 36% ~ 40% liquid alkali, after fully stirred, make pH 12. Clarify more than 8H. The supernatant is sent to the acidification tank, hydrochloric acid is added to adjust the pH at 1.5~2, and then sent to the oxidation tank to oxidize with chlorine gas to free iodine, which is adsorbed by 717 ion exchange resin and desorbed by adding sodium sulfite, the obtained iodine-containing desorption solution is added with potassium chlorate and sulfuric acid to precipitate iodine. The crude iodine is heated to above 150 ° C., and then fused and refined by adding concentrated sulfuric acid. Waste iodine water passed through an ion exchange column was used to extract mannitol.
2. air blowing method: the mother liquor of iodine-containing salt is added to hydrochloric acid for acidification, the pH is controlled at 1~2, and the solution is preheated to about 40 ℃, and sent to the oxidizer, at the same time, the appropriate amount of chlorine is introduced, the iodine ions in the feed liquid are oxidized into iodine molecules, and the oxidized liquid is sent to the blow-out tower, and the air preheated to 40 ° C is passed through the lower part of the blow-out tower, the iodine is blown out, and the iodine-containing air enters the absorption tower, is absorbed by the sulfur dioxide aqueous solution sprayed under the upper part of the tower, and is reduced to generate hydroiodic acid. When the concentration of the absorption solution reaches about 150g/L of iodine, it is sent to the iodine Analyzer. Under constant agitation, chlorine gas is slowly introduced to free iodine and precipitate, add concentrated sulfuric acid melt refined, cooling crystallization, crushing, iodine product.

Use

is the basic raw material for the manufacture of inorganic iodide and organic iodide, mainly used in medicine and health, for the manufacture of various iodine preparations, fungicides, disinfectants, deodorants, analgesics and antidotes of radioactive substances. It is a raw material for the production of pesticides, and it is also a feed additive for livestock. Industrial bacteriostatic agent for the synthesis of dyes, smoke extinguishing agents, photographic emulsion and cutting oil emulsion. Single-crystal prisms for the manufacture of electronic instruments, polarizers for optical instruments, and glass capable of transmitting infrared rays. For leather and special soaps. Iodine is a good catalyst for methylation, isomerization and dehydrogenation reactions in organic synthesis. It is also used as a separating agent for alkanes and alkenes. It is used as a stabilizer for Rosin, tall oil and other wood products. It is also used as a refining agent for high purity zirconium, titanium, hafnium, silicon and germanium.

Safety

rat oral LD50:14000mg/kg; Mouse oral LD50: 22000mg/kg. This product has a strong stimulating effect on the eyes, skin and mucous membranes. Human oral lethal dose is about 2~3G. Store in a cool, dry, well-ventilated non-combustible warehouse. Keep the container sealed. Protected from light. It is not allowed to be co-stored and mixed with ammonia and alkali substances. In the transport process to prevent rain, sun exposure. Handling and handling should be light. To prevent the rupture of the packaging bottle.

Introduction

Iodine is a chemical element with the chemical symbol I and atomic number 53. Iodine is a non-metallic element commonly found in nature in the oceans and soil. The following is a description of the nature, use, formulation and safety information of Iodine:

1. Nature:
-Appearance: Iodine is a blue-black crystal, common in solid state.
-Melting point: Iodine can directly change from solid to gaseous state under air temperature, which is called sub-limation. Its melting point is about 113.7 ° C.
-Boiling point: The boiling point of Iodine at normal pressure is about 184.3 ° C.
-Density: The density of Iodine is about 4.93g/cm³.
-Solubility: Iodine is insoluble in water, but soluble in some organic solvents such as alcohol, cyclohexane, etc.

2. Use:
-Pharmaceutical field: Iodine is widely used for disinfection and sterilization, and is commonly found in wound disinfection and oral care products.
-Food industry: Iodine is added as Iodine in table salt to prevent Iodine deficiency diseases, such as goiter.
-Chemical experiments: Iodine can be used to detect the presence of starch.

3. Preparation method:
- Iodine can be extracted by burning seaweed, or by extracting ore containing Iodine through chemical reaction.
-A typical reaction for preparing Iodine is to react Iodine with an oxidizing agent (such as hydrogen peroxide, sodium peroxide, etc.) to generate Iodine.

4. Safety Information:
- Iodine may be irritating to the skin and eyes at high concentrations, so you need to pay attention to the use of personal protective equipment, such as gloves and goggles, when handling Iodine.
- Iodine has low toxicity, but should avoid excessive intake of Iodine to avoid Iodine poisoning.
- Iodine can produce toxic Iodine hydrogen gas at high temperature or open flame, so avoid contact with flammable materials or oxidants.