Sodium rhodizonate dibasic
Sodium rhodizonate dibasic (CAS: 523-21-7; Formula: C6Na2O6; Molar Mass: 214.04 g/mol) is a versatile organic compound primarily utilised as an analytical reagent. It is recognised for its application as a metal titration indicator, particularly for barium and strontium. This compound serves as a key building block in chemical synthesis, offering specific reactivity for various organic transformations. Supplied by TSS since 1998, it is available for research and industrial applications.
- IUPAC
- 3,4,5,6-Tetraoxocyclohexene-1,2-diol disodium salt,Rhodizonic acid disodium salt
- Synonyms
- 3,4,5,6-Tetraoxocyclohexene-1,2-diol disodium saltRhodizonic acid disodium salt

Metal Titration Indicator
Sodium rhodizonate dibasic is widely employed as an indicator in the complexometric titration of certain metal ions. It is especially effective for determining the concentration of barium (Ba2+) and strontium (Sr2+) ions due to distinct colour changes at the titration endpoint.
Analytical Chemistry Reagent
This compound functions as a valuable reagent in analytical chemistry procedures. Its properties allow for its use in qualitative and quantitative analyses, contributing to the precise determination of various substances.
Organic Synthesis Building Block
As a functionalised organic molecule, sodium rhodizonate dibasic can serve as a starting material or intermediate in the synthesis of more complex organic compounds. Its unique structure offers opportunities for diverse chemical transformations.
| Molecular weight | 214.04 |
|---|---|
| Empirical formula | C6Na2O6 |
| Assay | 97% |
| Melting point | >300 °C(lit.) |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Sodium rhodizonate dibasic used for?
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Sodium rhodizonate dibasic is primarily used as a metal titration indicator, particularly for barium and strontium, and as a reagent in analytical chemistry and organic synthesis.
What are the CAS number and formula for Sodium rhodizonate dibasic?
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The CAS number is 523-21-7 and the molecular formula is C6Na2O6.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Sodium rhodizonate dibasic with an assay of 97%. We do not represent this product as USP, BP, or EP grade.
How should Sodium rhodizonate dibasic be handled safely?
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Sodium rhodizonate dibasic is classified with Hazard Statements H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation). Handle with appropriate personal protective equipment in a well-ventilated area.
Is Sodium rhodizonate dibasic a controlled substance?
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No, the provided data does not indicate that Sodium rhodizonate dibasic is a controlled substance.
How is Sodium rhodizonate dibasic packed and exported?
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Tech Serve Solutions is a global supplier and exporter of chemicals, packing and shipping products according to international regulations.
How can I request a quote or sample for Sodium rhodizonate dibasic?
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Please contact our sales team or use the online enquiry form to request a quote or a sample of Sodium rhodizonate dibasic.
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