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118-76-3

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.

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  • 118-76-3 Structure

  • Basic information

    1. Product Name: RHODIZONIC ACID DIHYDRATE
    2. 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)
    3. CAS NO:118-76-3
    4. Molecular Formula: C6H2O6
    5. Molecular Weight: 170.07648
    6. EINECS: 204-276-5
    7. Product Categories: N/A
    8. Mol File: 118-76-3.mol

  • Chemical Properties

    1. Melting Point: 248 °C (dec.)(lit.)
    2. Boiling Point: 259.67°C (rough estimate)
    3. Flash Point: 177.7°C
    4. Appearance: /
    5. Density: 1.7636 (rough estimate)
    6. Vapor Pressure: 3.5E-06mmHg at 25°C
    7. Refractive Index: 1.7540 (estimate)
    8. Storage Temp.: -20°C
    9. Solubility: N/A
    10. PKA: 2.62±0.50(Predicted)
    11. BRN: 2047007
    12. CAS DataBase Reference: RHODIZONIC ACID DIHYDRATE(CAS DataBase Reference)
    13. NIST Chemistry Reference: RHODIZONIC ACID DIHYDRATE(118-76-3)
    14. EPA Substance Registry System: RHODIZONIC ACID DIHYDRATE(118-76-3)

  • Safety Data

    1. Hazard Codes: N/A
    2. Statements: N/A
    3. Safety Statements: 22-24/25
    4. WGK Germany: 3
    5. RTECS:
    6. HazardClass: N/A
    7. PackingGroup: N/A
    8. Hazardous Substances Data: 118-76-3(Hazardous Substances Data)

118-76-3 Usage

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.

Check Digit Verification of cas no

The CAS Registry Mumber 118-76-3 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,1 and 8 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 118-76:
(5*1)+(4*1)+(3*8)+(2*7)+(1*6)=53
53 % 10 = 3
So 118-76-3 is a valid CAS Registry Number.
InChI:InChI=1/C6H2O6.2H2O/c7-1-2(8)4(10)6(12)5(11)3(1)9;;/h7-8H;2*1H2

118-76-3SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 15, 2017

Revision Date: Aug 15, 2017

1.Identification

1.1 GHS Product identifier

Product name RHODIZONIC ACID DIHYDRATE

1.2 Other means of identification

Product number -
Other names DIHYDROXYDIQUINOYL

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:118-76-3 SDS

118-76-3Relevant 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?)

Braga,Cojazzi,Maini,Grepioni

, p. 1221 - 1223 (2007/10/03)

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.

SYNTHESIS, STRUCTURE, AND PROPERTIES OF COMPOUNDS WITH A CHALCOGEN-NITROGEN BOND XIII. THE EFFECT OF THE NATURE OF THE CHALCOGEN ATOM ON THE ABILITY OF N-SULFONYLCHALCOGENIMIDES TO OXIDIZE HYDROQUINONE AND ITS DERIVATIVES

Naddaka, V. I.,Avanesyan, K. V.,Cherkinskaya, M. L.

, p. 705 - 711 (2007/10/02)

N-Sulfonyldiphenylsulfimides do not react with hydroquinone, 2,5-di(tert-butyl)hydroquinone, and tetrahydroxy-p-benzoquinone even with prolonged heating above 150 deg C.Selenimides and tellurimides with analogous structures oxidize these compounds to the corresponding quinones.The oxidizing power of the tellurimides in the investigated reations is higher than that of the selenimides.This is explained by the increased polarity of the chalcogen-nitrogen bond and, consequently, the ease of its cleavage in N-sulfonylchalcogenimides in the series: S Se Te.The intermediate products from the reaction of the tellurium derivatives with hydroquinone, i.e., polymeric diaryltellurium p-hydroxyphenolates, were isolated.

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