Difference between revisions of "Rubiadin"
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1,3-hydroxy-2-methylanthraquinone; CI 75350; rubiadina (Port.) | 1,3-hydroxy-2-methylanthraquinone; CI 75350; rubiadina (Port.) | ||
| − | == | + | ==Risks== |
| + | * Millipore Sigma: [https://www.sigmaaldrich.com/US/en/product/sial/74553 SDS] | ||
| + | ==Physical and Chemical Properties== | ||
| − | Soluble in ethanol, ether, benzene. Insoluble in boiling water, lime water. | + | * Soluble in ethanol, ether, benzene. Insoluble in boiling water, lime water. |
| − | + | * Absorption max = 246, 280, 415 nm. | |
| − | Absorption max = 246, 280, 415 nm. | ||
{| class="wikitable" | {| class="wikitable" | ||
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! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | 302 | + | | 302 C |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
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|} | |} | ||
| − | == | + | ==Resources and Citations== |
| − | |||
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* ''Artists' Pigments: A Handbook of their History and Characteristics'', Elisabeth West FitzHugh, Oxford University Press, Oxford, Vol. 3, 1997 Comment: H.Schweppe, J.Winter, "Madder and Alizarin" | * ''Artists' Pigments: A Handbook of their History and Characteristics'', Elisabeth West FitzHugh, Oxford University Press, Oxford, Vol. 3, 1997 Comment: H.Schweppe, J.Winter, "Madder and Alizarin" | ||
Latest revision as of 09:39, 28 June 2022
Description
Yellow plate-like crystals. Rubiadin is one of the natural dyes extracted from madder roots and other Rubiaceae family plants. It dissolves in alkalis to form a red solution and turns yellow in acids.
Synonyms and Related Terms
1,3-hydroxy-2-methylanthraquinone; CI 75350; rubiadina (Port.)
Risks
- Millipore Sigma: SDS
Physical and Chemical Properties
- Soluble in ethanol, ether, benzene. Insoluble in boiling water, lime water.
- Absorption max = 246, 280, 415 nm.
| Composition | C15H10O4 |
|---|---|
| Melting Point | 302 C |
| Molecular Weight | mol. wt. = 254.24 |
Resources and Citations
- Artists' Pigments: A Handbook of their History and Characteristics, Elisabeth West FitzHugh, Oxford University Press, Oxford, Vol. 3, 1997 Comment: H.Schweppe, J.Winter, "Madder and Alizarin"