Iodic acid

HCID 24345CAS 25659-31-8

Substructure search Find similar structures

Basic information

Standard SMILES: [O-][I+2]([O-])O
InChIKey: ICIWUVCWSCSTAQ-UHFFFAOYSA-N
Molecular formula: HIO3
Average molar mass: 175.911 g/mol
Monoisotopic mass: 175.89704189

Overview

Iodic acid is an iodine oxoacid. It has a role as an astringent. It is a conjugate acid of an iodate.

Names & identifiers

Preferred name: Iodic acid
IUPAC: iodic acid
English name: LEAD IODATE
Molecular formula: H3IO3Pb
Molecular weight: 385.13

Names & synonyms

Iodic acid7782-68-5Monoiodic acidIodic acid (HIO3)6U8J18JSBMCHEBI:24857DTXSID2064812RefChem:923486DTXCID9048013231-962-1HIO3Iodsaeure

Show more names

LEAD IODATELead(Ⅱ)iodatelead diiodateLEAD(II) IODATElead(2+),diiodateLEAD(II) IODATE, 99.99%Bisiodic acid lead(II) saltiodicacid(hio3),lead(2++)saltLEAD IODATE ISO 9001：2015 REACHIodicacid (HIO3), lead(2+) salt (2:1)

trioxoiodic acidtrioxidoiodine(.)MFCD00011348hydrogen trioxoiodatehydroxidodioxidoiodineHOIO2hydroxy-lambda(5)-iodanedione[IO2(OH)]

Database identifiers

CAS: 25659-31-8、7782-68-5
PubChem CID: 24345
DTXSID: DTXSID2064812
ChEMBL: CHEMBL1161636
ChEBI: CHEBI:24857
UNII: 6U8J18JSBM
EC Number: 231-962-1
Nikkaji: J43.589I

Properties

Computed structural properties

XLogP: -0.3
Topological polar surface area: 54.4 Å²
Hydrogen bond donors: 1
Hydrogen bond acceptors: 3
Rotatable bonds: 0
Heavy atoms: 4
Formal charge: 0
Complexity: 46.2

Experimental & physicochemical properties

Chemical ClassesToxic Gases & Vapors -> Acids, Inorganic

SpringerMaterials Propertiesdielectric constant

Density4.629 @25 °C

Physical Description · 2 items

Dry Powder

Colorless solid; [Hawley] Colorless or light yellow powder; [MSDSonline] Forms rhombohedral crystals--decompose at 110 deg C; [Ullmann]

Physicochemical properties

Melting point: 300 °C · 300 °C (dec.)(lit.)
Density: 6.5 g/mL · 6.5 g/mL at 25 °C(lit.)
form: white orthorhombic crystals
color: white orthorhombic crystals, crystalline
Water Solubility: 2 O: · g/L solution H2O: 0.0254 (25°C) [KRU93]
Solubility Product Constant (Ksp): 12.43 · pKsp: 12.43
REACH Annex XVII Substances List: Lead diiodate (25659-31-8)
EPA Substance Registry System: Lead(II) iodate (25659-31-8)
Symbol(GHS): 3 · GHS03,GHS07,GHS08,GHS09
Signal word: Danger
Hazard statements: 272 · H272-H302-H332-H360-H373-H410
Precautionary statements: 264 · P264-P270-P261-P271-P201-P202-P280-P260-P273-P301+P312-P330-P304+P340-P312-P308+P313-P314-P391-P405-P501
Hazard Codes: O,T,N
Risk Statements: 61 · 61-8-20/22-33-50/53-62
Safety Statements: 53 · 53-45-60-61
RIDADR: 3087 · UN 3087 5.1/PG 3
WGK Germany: 3 · 3
TSCA: TSCA listed

Safety & regulation

GHS classification

GHS Classification · 6 items

Danger

H272 (100%): May intensify fire; oxidizer [Danger Oxidizing liquids; Oxidizing solids]

P210, P220, P260, P264, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P321, P363, P370+P378, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 50 reports by companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Danger

H302: Harmful if swallowed [Warning Acute toxicity, oral]

Hazard information

Regulatory Information · 4 items

Chemical: Iodic acid (HIO3)

Iodic acid (HIO3) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Iodic acid (HIO3) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

Status: Active Update: 25-04-2018 https://echa.europa.eu/registration-dossier/-/registered-dossier/24252

Iodic acid: Does not have an individual approval but may be used under an appropriate group standard

Other Safety InformationIMAP assessments - Iodic acid and selected salts: Human health tier II assessment

Hazards Summary · 1 item

Reacts vigorously with organic matter; Oxidizes iodide to iodine, sulfite to sulfate, and hydrogen sulfide to sulfur; [Ullmann] Corrosive to skin and eyes; [eChemPortal: ERMA] May cause fire on contact with combustible materials; A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; Inhalation may cause chemical pneumonitis; [MSDSonline]

Hazard Classes and Categories · 2 items

Ox. Sol. 2 (100%)

Acute toxicity (ingestion) - category 4

Safety & protection

Protective Action Criteria (PAC) · 3 items

1.5 [ppm]

17 [ppm]

100 [ppm]

Toxicology

Adverse EffectsDermatotoxin - Skin burns.

Safety data

wgk: 3
tsca: TSCA listed
ridadr: UN 3087 5.1/PG 3
risk_code: 61-8-20/22-33-50/53-62
Signal word: Danger
Symbol(GHS): GHS03,GHS07,GHS08,GHS09
hazard_code: O,T,N
safety_code: 53-45-60-61
Hazard statements: H272-H302-H332-H360-H373-H410
Precautionary statements: P264-P270-P261-P271-P201-P202-P280-P260-P273-P301+P312-P330-P304+P340-P312-P308+P313-P314-P391-P405-P501