118-76-3

Basic information

• Product Name: RHODIZONIC ACID DIHYDRATE
• Synonyms: rhodizonicacid;1,2-Dihydroxy-3,4,5,6-tetraoxocyclohexene;5,6-dihydroxycyclohex-5-ene-1,2,3,4-tetraone;DIHYDROXYDIQUINOYL;5,6-Dihydroxy-1,2,3,4-benzodiquinone;13021-40-4 (Di-potassium salt);16833-52-6 (Barium salt);523-21-7 (Hydrochloride salt)
• CAS NO: 118-76-3
• Molecular Formula: C₆H₂O₆
• Molecular Weight: 170.07648
• EINECS: 204-276-5
• Mol File: 118-76-3.mol
• Article Data: 3

Chemical Properties

• Melting Point: 248 °C (dec.)(lit.)
• Boiling Point: 259.67°C (rough estimate)
• Flash Point: 177.7°C
• Appearance: /
• Density: 1.7636 (rough estimate)
• Vapor Pressure: 3.5E-06mmHg at 25°C
• Refractive Index: 1.7540 (estimate)
• Storage Temp.: -20°C
• PKA: 2.62±0.50(Predicted)
• BRN: 2047007
• CAS DataBase Reference: RHODIZONIC ACID DIHYDRATE(CAS DataBase Reference)
• NIST Chemistry Reference: RHODIZONIC ACID DIHYDRATE(118-76-3)
• EPA Substance Registry System: RHODIZONIC ACID DIHYDRATE(118-76-3)

Safety Data

• Safety Statements: 22-24/25
• WGK Germany: 3
• Hazardous Substances Data: 118-76-3(Hazardous Substances Data)

Usage

Description

Rhodizonic acid dihydrate, with the chemical formula H4C6N4O6, is a white crystalline solid that is soluble in water and other polar solvents. It is a highly toxic and reactive compound, primarily used as a reagent in chemical analysis for the detection of metals such as lead and silver. Known for its potent oxidizing properties, it requires careful handling due to its toxic and corrosive nature.

Uses

Used in Chemical Analysis:
Rhodizonic acid dihydrate is used as a reagent for the detection of metals, particularly lead and silver, in chemical analysis. Its potent oxidizing properties make it effective in identifying these metals in various samples.
Used in Laboratory Settings:
Due to its highly toxic and reactive nature, rhodizonic acid dihydrate has limited industrial use and is primarily utilized in laboratory settings for analytical purposes. It is essential to handle this compound with extreme caution to avoid potential hazards and ensure safety in the laboratory environment.

InChI:InChI=1/C6H2O6.2H2O/c7-1-2(8)4(10)6(12)5(11)3(1)9;;/h7-8H;2*1H2

Upstream product

• 54890-03-8 dodecahydroxycyclohexane 
• 87-89-8 D-myo-inositol 
• 7697-37-2 nitric acid 
• 64-17-5 ethanol 
• 7732-18-5 water 
• 131543-46-9 Glyoxal 
• 63183-44-8 2,3,5,5,6,6-hexahydrocyclohex-2-ene-1,4-dione 
• 319-89-1 tetrahydroxy-1,4-quinone 

Downstream Products

• 54890-03-8 dodecahydroxycyclohexane 
• 23774-14-3 7-Methyl-2.3-dihydroxy-phenazin-1.4-chinon 
• 23774-13-2 2.3-Dihydroxy-phenazin-1.4-chinon 
• 319-89-1 tetrahydroxy-1,4-quinone 
• 19920-56-0 1-Benzyl-3-carbamoyl-pyridinium; hydroxide 
• 608-80-0 benzenehexol 
• 5096-13-9 1-benzylnicotinamide chloride 
• 488-86-8 croconic acid 
• 14379-00-1 croconic acid disodium salt 
• 63183-44-8 2,3,5,5,6,6-hexahydrocyclohex-2-ene-1,4-dione 
• 4358-87-6 (RS)-methyl mandelate 
• 104286-48-8 2,3,4,5,6-Pentahydroxy-phenolate1-benzyl-3-carbamoyl-pyridinium; 
• 1262234-98-9 C₈₂H₁₀₄N₄O₆ 
• 523-21-7 sodium rhodizonate dibasic 

Relevant articles and documents

-

-

Reversible solid-state interconversion of rhodizonic acid H2C6O6 into H6C6O8 and the solid-state structure of the rhodizonate dianion C6O62- (aromatic or non-aromatic?)

Anhydrous rhodizonic acid H2C6O6 is obtained by (fully reversible) thermal dehydration of solid 2,3,5,5,6,6-hexahydroxycyclohex-2-ene-1,4-dione, H6C6O8, commonly known as rhodizonic acid dihydrate. Treatment of H6C6O8 with RbOH yields crystals of Rb2C6O6; the oxocarbon dianion C6O62- is shown to possess a flat, benzene-type structure, with C-C bonds shorter than expected for a (non-aromatic) ketonic-type structure.

Chemical components of Pyrostegia venusta flowers

-