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Chloranilic acid

HCID 66604
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Basic informationOverviewNames & identifiersPropertiesSafety & regulationChemistry & industryRelated reactionsCompound notes
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Basic information

CAS
87-88-7
Standard SMILES
O=C1C(O)=C(Cl)C(=O)C(O)=C1Cl
InChIKey
IPPWILKGXFOXHO-UHFFFAOYSA-N
Molecular formula
C6H2Cl2O4
Average molar mass
208.98 g/mol
Monoisotopic mass
207.9330139

Overview

structure

Names & identifiers

Preferred name
Chloranilic acid
IUPAC
2,5-dichloro-3,6-dihydroxycyclohexa-2,5-diene-1,4-dione
English name
Chloranilic acid
Molecular formula
C6H2Cl2O4
Molecular weight
208.98

Names & synonyms

Chloranilic acid87-88-7p-Chloranilic acid2,5-Dichloro-3,6-dihydroxy-p-benzoquinone2,5-Cyclohexadiene-1,4-dione, 2,5-dichloro-3,6-dihydroxy-YJ8L3BB7Y4NSC-6108DTXSID3058959NSC-97383RefChem:125280DTXCID0048557201-780-7
Show more names
NSC 97383chloranilicp-chloranilicacidTIMTEC-BB SBB008913CHLORANILIC ACID AR
2,5-dichloro-3,6-dihydroxycyclohexa-2,5-diene-1,4-dioneCHLORANILICACIDNSC 61082,5-dichloro-3,6-dihydroxy-1,4-benzoquinone2,5-Dichloro-3,6-dihydroxybenzoquinone2,5-Dihydroxy-3,6-dichlorobenzoquinoneBRN 1875040p-Quinone, 2,5-dichloro-3,6-dihydroxy-

Database identifiers

CAS
87-88-7
PubChem CID
66604
DTXSID
DTXSID3058959
UNII
YJ8L3BB7Y4
EC Number
201-780-7
Nikkaji
J1.055.803D、J9.875B

Properties

Computed structural properties

XLogP
1.4
Topological polar surface area
74.6 Ų
Hydrogen bond donors
2
Hydrogen bond acceptors
4
Rotatable bonds
0
Heavy atoms
12
Formal charge
0
Complexity
305

Experimental & physicochemical properties

Chemical ClassesOther Classes -> Aromatic Ketones, Halogenated
SpringerMaterials PropertiesCrystal structure
Physical DescriptionRed solid; [Merck Index] Orange powder; [Alfa Aesar MSDS]

Physicochemical properties

Melting point
300 °C · ≥300 °C (lit.)
Boiling point
300.11 °C · 300.11°C (rough estimate)
Density
1.93 · 1.93
refractive index
1.457 · 1.4570 (estimate)
storage temp.
Amber Vial, Refrigerator
solubility
DMSO (Slightly), Methanol (Slightly)
pka
1 · pK1:1.09;pK2:2.42 (25°C)
form
Fine Powder
color
Orange to red
Odor
Odorless

Safety & regulation

Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.

GHS classification

GHS Classification · 4 items

Warning

H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]

P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 55 reports by companies from 6 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Hazard information

Regulatory Information · 2 items

Chemical: 2,5-Cyclohexadiene-1,4-dione, 2,5-dichloro-3,6-dihydroxy-

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

Hazards SummaryA skin and strong eye irritant; [Alfa Aesar MSDS]
Hazard Classes and CategoriesSkin Irrit. 2 (100%)

Safety data

PPE
dust mask type N95 (US), Eyeshields, Gloves
wgk
3
tsca
TSCA listed
rtecs
DK4005000
hs_code
29147000
risk_code
36/37/38
Signal word
Warning
Symbol(GHS)
GHS07
hazard_code
Xi
safety_code
26-36

Chemistry & industry

Uses & manufacturing

UsesReacts with metal cations forming stable salts; Used in spectrophotometry; [Merck Index]
General Manufacturing Information2,5-Cyclohexadiene-1,4-dione, 2,5-dichloro-3,6-dihydroxy-: ACTIVE
Applications · 3 items

UsesChloranilic acid is the reactant involved in:Acting as a proton donor in reactions studying dimensionality controlSynthesis of dimethylbipyridyl complexesSynthesis of (nonylbenzimidazolylmethyl)benzene for preparation of neutral altitudinal rotor-shaped dirhenium metallacyclesCharge-transfer reactions with metoprolol tartrateSalt formation with organic basesSynthesis of osmium metalla-rectangles with anticancer activity

UsesChloranilic acid is a strong dibasic organic acid which exhibits electron-acceptor properties on one hand and acidic properties leading to formation of hydrogen bonds on the other hand.Chloranilic acid is used in spectrophotometry. It reacts with metal ions to form stable complexes. It is also used as a reactant in the preparation of dimethylbipyridyl complexes and (nonylbenzimidazolylmethyl)benzene. Further, it is used in charge-transfer reactions with metoprolol tartrate. It is also employed in the synthesis of osmium metalla-rectangles with anticancer activity. In addition to this, it has potential antibacterial activities against methicillin-resistant Staphylococcus aureus.

UsesReacts with metal cations to form stable salts. Used in spectrophotometry: Hart, organic. Chem. Bull. 33, no. 3 (1961).

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Compound notes

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On this pageBasic informationOverviewNames & identifiersPropertiesSafety & regulationChemistry & industryRelated reactionsCompound notes
Water Solubility
Soluble in hot water and methanol. Insoluble in organic solvents.
Merck
14 · 14,2079
BRN
1875040 · 1875040
Stability
Stable. Incompatible with strong oxidizing agents.
InChI
1S/C6H2Cl2O4/c7-1-3(9)5(11)2(8)6(12)4(1)10/h9,12H
InChIKey
IPPWILKGXFOXHO-UHFFFAOYSA-N
SMILES
OC1=C(Cl)C(=O)C(O)=C(Cl)C1=O
CAS DataBase Reference
87 · 87-88-7(CAS DataBase Reference)
EWG's Food Scores
1 · 1
FDA UNII
8 L3BB7Y4 · YJ8L3BB7Y4
EPA Substance Registry System
2 · 2,5-Cyclohexadiene-1,4-dione, 2,5-dichloro-3,6-dihydroxy- (87-88-7)
UNSPSC Code
12352100 · 12352100
NACRES
22 · NA.22
Symbol(GHS)
7 · GHS07
Signal word
Warning
Hazard statements
315 · H315-H319-H335
Precautionary statements
261 · P261-P264-P271-P280-P302+P352-P305+P351+P338
target organs
Respiratory system
PPE
95 · dust mask type N95 (US), Eyeshields, Gloves
Hazard Codes
Xi
Risk Statements
36 · 36/37/38
Safety Statements
26 · 26-36
WGK Germany
3 · 3
RTECS
4005000 · DK4005000
TSCA
TSCA listed
HS Code
29147000 · 29147000
Storage Class
11 · 11 - Combustible Solids
Hazard Classifications
2 Skin · Eye Irrit. 2Skin Irrit. 2STOT SE 3
Storage Class
11 - Combustible Solids
target organs
Respiratory system
Hazard statements
H315-H319-H335
Hazard Classifications
Eye Irrit. 2Skin Irrit. 2STOT SE 3
Precautionary statements
P261-P264-P271-P280-P302+P352-P305+P351+P338