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Iodine monochloride

Iodine monochloride Structure
Iodine monochloride structure
CAS No.
7790-99-0
Chemical Name:
Iodine monochloride
Synonyms
ICl;IODINE CHLORIDE;IODINE CHLORIDE;WIJS REAGENT;WIJS SOLUTION;Iodine Monochlorid;IODOCHLORIDE;iodochlorane;CHLORINE IODIDE;IODOMONOCHLORIDE
CBNumber:
CB8664819
Molecular Formula:
ClI
Lewis structure
icl lewis structure
Crystal structure
iodine-monochloride crystal structure
Molecular Weight:
162.36
MDL Number:
MFCD00011354
MOL File:
7790-99-0.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-06-24 18:39:39
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Iodine monochloride Properties

Melting point 25-27°C
Boiling point 97.4 °C (lit.)
Density 3.24 g/mL at 25 °C (lit.)
vapor density 5.5 (vs air)
Flash point 96-98°C
storage temp. 2-8°C
solubility acetic acid: soluble(lit.)
form Liquid
color Red-brown
PH <1 (H2O, 20°C)
Water Solubility decomposes
Specific Heat Capacity Cp(gas): 0.22 J/(g·K), at 25℃
Sensitive Moisture Sensitive
Merck 14,5017
BRN 3902972
Henry's Law Constant 1.1×100 mol/(m3Pa) at 25℃, Wagman et al. (1982)
Stability Stable. Incompatible with organic materials, strong bases, metals. Air, light and moisture sensitive.
InChI 1S/ClI/c1-2
InChIKey QZRGKCOWNLSUDK-UHFFFAOYSA-N
SMILES ClI
Indirect Additives used in Food Contact Substances IODINE MONOCHLORIDE
FDA 21 CFR 178.1010
CAS DataBase Reference 7790-99-0(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII 0SMG5NLU45
NIST Chemistry Reference Iodine monochloride(7790-99-0)
EPA Substance Registry System Iodine chloride (ICl) (7790-99-0)
UNSPSC Code 12352402
NACRES NB.24

SAFETY

Risk and Safety Statements

Symbol(GHS)  Corrosion (GHS05)Skull and Crossbones (GHS06)
GHS05,GHS06
Signal word  Danger
Hazard statements  H300-H311-H314-H335-H290
Precautionary statements  P501-P270-P261-P234-P271-P264-P280-P390-P361+P364-P303+P361+P353-P301+P330+P331-P301+P310+P330-P304+P340+P310-P305+P351+P338+P310-P403+P233-P406-P405
target organs Respiratory system
PPE Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter
Hazard Codes  C
Risk Statements  34-42-35-10-40-67-37
Safety Statements  26-36/37/39-45-23
RIDADR  UN 1792 8/PG II (IODINE MONOCHLORIDE, SOLID)
RIDADR  UN 3498 8/PG II (IODINE MONOCHLORIDE, LIQUID)
WGK Germany  3
RTECS  NN1650000
F  1-8-10
TSCA  TSCA listed
HS Code  3822 00 00
HazardClass  8
PackingGroup  II
Storage Class 8A - Combustible corrosive hazardous materials
Hazard Classifications Eye Dam. 1
Skin Corr. 1B
STOT SE 3
Hazardous Substances Data 7790-99-0(Hazardous Substances Data)
REACH Registrations Active
NFPA 704
0
3 1

Iodine monochloride price More Price(52)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 8.04771 Iodine monochloride for synthesis 7790-99-0 100g $165 2026-04-30 Buy
Sigma-Aldrich 8.04771 Iodine monochloride for synthesis 7790-99-0 250g $333 2026-04-30 Buy
Sigma-Aldrich 208221 Iodine monochloride reagent grade, ≥95% 7790-99-0 5g $64.3 2026-04-30 Buy
Sigma-Aldrich 208221 Iodine monochloride reagent grade, ≥95% 7790-99-0 100g $193 2026-04-30 Buy
Sigma-Aldrich 1.09163 Wijs solution for determination of the iodine number c(ICl) = 0.1 mol/l Titripur? 7790-99-0 1L $102 2026-03-19 Buy
Product number Packaging Price Buy
8.04771 100g $165 Buy
8.04771 250g $333 Buy
208221 5g $64.3 Buy
208221 100g $193 Buy
1.09163 1L $102 Buy

Iodine monochloride Chemical Properties, Uses, Production

Chemical Properties

Iodine monochloride is a reddish brown liquid or black crystals, there are two variants of crystals. α-type is black needles, stable, ruby red under light. β-type is black flakes, unstable, brownish red under light. It has the odor of chlorine and iodine. It does not absorb moisture but can form iodine pentoxide when contacting air. Soluble in water, ethanol, ether, carbon disulfide, and acetic acid, relative density (d0) α-type 3.1822, (d34) β-type 3.24. Melting point α-type 27.2 ℃, β-type 13.9 ℃. Boiling point α-type 97.4°C, β-type 97.4, 100°C (decomposition). It also exhibits corrosive properties. It has the flavor of chlorine and iodine, and it is oxidative and strongly corrosive, and iodination with organic matter, it also shows chlorination, and it can be used for the substitution of the aromatic ring. Iodine monochloride

Uses

Iodine monochloride is used to estimate theiodine values of fats and oils and as a topicalanti-infective (Merck 1996). For determination of iodine absorption number of fats Iodine monochloride is used as a catalyst in organic synthesis. It is the source of electrophilic iodine in the synthesis of certain aromatic iodides.

Preparation

Iodine monochloride is prepared by the action of liquid or dry chlorine on astoichiometric quantity of solid iodine. Aqueous solutions of ICl are preparedby passing chlorine gas into a suspension of iodine in moderately stronghydrochloric acid:
5I2 + 4HCl + 3Cl2 → 10ICl + 2H2
Alternatively, iodine monochloride may be made by oxidation of iodine withiodic acid in strong hydrochloric acid solution:
2I2 + HIO3 + 2HCl → 2ICl + 3HIO

Air & Water Reactions

Reacts with air to form iodine pentaoxide (I2O5), which decomposes into iodine (I2) and oxygen (O2) with heat beginning at 275°C and proceeding rapidly at 350°C. Soluble in water; reacts with water or steam to produce toxic and corrosive fumes [Lewis].

Reactions

Iodine monochloride is moderately explosive when heated [Lewis]. Reacts with rubber and many organic materials. Enflames (after a period of delay) with aluminum foil [Mellor 2:119(1946-1947)]. Reacts dangerously with other active metals. Reacts vigorously with cadmium sulfide, lead sulfide, silver sulfide, and zinc sulfide [Mellor 2, Supp. 1:502(1956)]. Combines very exothermically with phosphorus trichloride [Mellor 2, Supp. 1:502(1956)]. Forms Iodine pentaoxide in air which reacts explosively when warmed with carbon, sulfur, sugar, resin, or powdered combustible elements [Mellor 8: 841(1946-1947)].

Hazard

Toxic by ingestion and inhalation, strong irritant to eyes and skin. Reaction with water or moist air will release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.

Health Hazard

Iodine monochloride is highly corrosive tothe skin. Contact with the skin causes burns and dark patches. Upon contact, washimmediately with 15-20% HCl. Vapors areirritating to the skin, eyes, and mucous mem branes. The compound is moderate to highlytoxic by an oral route. The lethal dose in ratsis 59 mg/kg (NIOSH 1986).

Fire Hazard

Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.

reaction suitability

reaction type: Redox Reactions

Purification Methods

Purify it by repeated fractional crystallisation from its melt at low temperatures. The black crystals melt to a red-brown liquid. [Cornog & Karges Inorg Synth I 165 1939.]

Iodine monochloride Preparation Products And Raw materials

Raw materials

Preparation Products

5-Iodoisatin 6,10,12-trichloronaphth[2,3-c]acridine-5,8,14(13H)-trione 5-Amino-2,4,6-triiodo-N-methylisophthalamic Acid 2-Amino-5-iodobenzoic acid 3,5-Diiodosalicylic acid
2,6-Diiodo-4-nitroaniline N-Acetyl-3,5-diiodo-L-tyrosine ethyl ester 3-Amino-2,4,6-triiodobenzoic acid 4-Iodoanisole 3-(3-Amino-2,4,6-triiodophenyl)propionic acid
2,4-Dichloro-5-iodopyrimidine 3-Cyano-4-hydroxybenzoic acid Sulfuric acid CYANOGEN IODIDE 5,7-Diiodo-8-quinolinol
3-Bromo-5-iodophenylboronic acid

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Iodine monochloride Suppliers

Global Suppliers ( 298)
Supplier Tel Email Country ProdList Advantage
Shanghai Aladdin Bio-Chem Technology Co.,LTD 400-6206333 13167063860 anhua.mao@aladdin-e.com China 29985 65
Energy Chemical 400-0056266 sales8178@energy-chemical.com China 44850 61
Qingdao Tocean iodine products co. LTD 18669835223 tuohaidian@163.com China 49 58
Shanghai Qiao Chemical Science Co., Ltd 021-58892003 info@qiaochem.com China 6065 65
Chengdu HuaXia Chemical Reagent Co. Ltd 400-1166-196 13458535857 cdhxsj@163.com China 13323 58
Shanghai Likai Chemical Technology Co., Ltd. 16628776521 noname2@shanghailikai.com China 2840 58
Meryer (Shanghai) Chemical Technology Co., Ltd. 4006356688 18621169109 market03@meryer.com China 40202 62
Alfa Aesar 400-6106006 saleschina@alfa-asia.com China 30103 84
Beijing dtftchem Technology Co., Ltd. 010-60275820 13031183356 elainezt@sina.com China 1386 62
JinYan Chemicals(ShangHai) Co.,Ltd. 13817811078 sales@jingyan-chemical.com China 9963 60
Supplier Advantage
Shanghai Aladdin Bio-Chem Technology Co.,LTD 65
Energy Chemical 61
Qingdao Tocean iodine products co. LTD 58
Shanghai Qiao Chemical Science Co., Ltd 65
Chengdu HuaXia Chemical Reagent Co. Ltd 58
Shanghai Likai Chemical Technology Co., Ltd. 58
Meryer (Shanghai) Chemical Technology Co., Ltd. 62
Alfa Aesar 84
Beijing dtftchem Technology Co., Ltd. 62
JinYan Chemicals(ShangHai) Co.,Ltd. 60

Related articles

View Latest Price from Iodine monochloride manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
Iodine monochloride pictures 2019-07-12 Iodine monochloride
7790-99-0
 $1.00 1KG 99% 25kg Career Henan Chemical Co

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