Molekula
Purpurin (C.I.58205)
Purpurin (C.I. 58205) is a natural anthraquinone dye used in pigments, dyes, and as a pH indicator in analytical chemistry. It appears as a red crystalline powder with a molecular formula of C14H8O5 and a molecular weight of 256.21 g/mol. CAS number: 81-54-9. Store at ambient temperature. Signal word: Warning. Molekula supplies Purpurin (C.I. 58205) from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Overview
Purpurin (C.I. 58205) is a natural anthraquinone dye used in pigments, dyes, and as a pH indicator in analytical chemistry. It appears as a red crystalline powder with a molecular formula of C14H8O5 and a molecular weight of 256.21 g/mol. CAS number: 81-54-9. Store at ambient temperature. Signal word: Warning. Molekula supplies Purpurin (C.I. 58205) from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Specifications
| Property | Value |
|---|---|
| Appearance | Dark red to orange brown to brown powder |
| Melting Point | 253-256°C |
| pH | 3.8-4.5 (50mg in 100m/l, 50/50 THF & H2O) |
| Solubility | (1mg/ml NH4OH) Red to very dark red to purple solution. |
| Assay (HPLC) | ≥94% |
| Impurity HPLC | ≤3% Alizarin |
| Loss on drying ( 150°C 1 hrs ) | ≤1.0% |
| For research use only, not for human use | research use only, not for human use |
| Spectrophotometric Assay Conc. 0.01g/l in methanol Extinction Co-efficient | E (237nm +/- 3nm) = 17000, E (257nm +/- 3nm) = 17000, E (514nm +/- 3nm) = 7000 |
| Manganese (Mn) ICP | ≤500ppm |
| Sulphur (S) ICP | ≤1500ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Shelf Life | 24 months |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| CAS Number | 81-54-9 |
| Molecular Formula | C14H8O5 |
| Molecular Weight | 256.21 |
| REACH Code | Y110 |
| Tariff Code | 29146980 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
For research and industrial use only
Documents
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Pricing & pack sizes
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is Purpurin (C.I.58205) used for?
Purpurin is primarily used as a natural dye and pigment in textile and cosmetic applications, and it also serves as a research chemical in studies involving anthraquinone derivatives.
What is the chemical formula and molecular weight of Purpurin?
The chemical formula of Purpurin is C14H8O5, and its molecular weight is 256.21 g/mol.
How should Purpurin be stored?
Purpurin should be stored at ambient temperature, protected from light and moisture, in a tightly sealed container.
What grade of Purpurin is available from Molekula?
Molekula supplies Purpurin in research-grade quality, suitable for laboratory and non-pharmaceutical applications.
Can Molekula supply Purpurin in bulk quantities?
Yes, Molekula can supply Purpurin in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with a Purpurin order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS); additional documentation can be provided upon request.
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