1,4-Dihydroxyanthraquinone
1,4-Dihydroxyanthraquinone (CAS: 81-64-1), a key organic compound with the molecular formula C14H8O4, presents as a red-brown powder. This anthraquinone derivative is a valuable intermediate in chemical synthesis, particularly for the production of dyes and pigments. Its structural features lend themselves to various chemical transformations, making it a useful building block in organic chemistry research and industrial applications requiring specific chromophoric properties.
- IUPAC
- Quinizarin
- Synonyms
- QuinizarinC.I. Solvent Orange 86C.I. 580501,4-Anthracenediol

Dye and Pigment Intermediate
1,4-Dihydroxyanthraquinone serves as a crucial precursor in the synthesis of various anthraquinone dyes and pigments. Its chemical structure allows for functionalization to create a spectrum of colours used in textiles, inks, and coatings.
Organic Synthesis Building Block
As a versatile organic building block, this compound is employed in complex chemical syntheses. Its reactive hydroxyl groups and aromatic core facilitate a range of chemical reactions for the creation of novel compounds.
Research and Development
It is utilised in laboratory settings for research into new materials and chemical processes. Its well-defined structure and properties make it suitable for academic and industrial R&D projects.
| Molecular weight | 240.21 |
|---|---|
| Empirical formula | C14H8O4 |
| Assay | ≥98.0% (HPLC) |
| Grade | purum |
| Form | powder |
| Colour | red-brown |
| Vapour pressure | 1 mmHg (196.7 °C) |
| Melting point | 195-200 °C |
| Vapour density | 8.3 (vs air) |

Hazard statements
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P273Avoid release to the environment
- P501Dispose of contents and container per local regulations
| Protective equipment | Eyeshields, Faceshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Transport (UN / ADR) | UN 3077 9 / PGIII |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | N |
| Risk statements (R) | 50/53 |
| Safety statements (S) | 60-61 |
| Ignition residue | ≤1.0% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
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 1,4-Dihydroxyanthraquinone used for?
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1,4-Dihydroxyanthraquinone is primarily used as an intermediate in the synthesis of dyes and pigments, and as a versatile building block in organic synthesis for research and development purposes.
What are the CAS number and formula for 1,4-Dihydroxyanthraquinone?
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The CAS number is 81-64-1, and its molecular formula is C14H8O4.
What grade and purity does Tech Serve Solutions supply for 1,4-Dihydroxyanthraquinone?
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Tech Serve Solutions supplies 1,4-Dihydroxyanthraquinone with a purity of ≥98.0% (HPLC) at a purum grade. We do not represent this product as USP, BP, or EP grade.
What are the key safety and handling considerations for 1,4-Dihydroxyanthraquinone?
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1,4-Dihydroxyanthraquinone is classified with GHS09 and carries hazard statement H410, indicating it is toxic to aquatic life with long-lasting effects. Handling requires appropriate personal protective equipment, including eyeshields, faceshields, gloves, and a type N95 or P1 respirator filter. Ensure it is not released into the environment.
How is 1,4-Dihydroxyanthraquinone packed, shipped, and exported by TSS?
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1,4-Dihydroxyanthraquinone is packed as a red-brown powder, adhering to all relevant shipping regulations. As a global supplier and exporter, TSS ensures compliant and secure shipment worldwide.
How can I request a quote or sample for 1,4-Dihydroxyanthraquinone?
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To request a quote or sample of 1,4-Dihydroxyanthraquinone, please contact the TSS sales department through our website or by phone, referencing CAS 81-64-1.
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