Name | Aurin |
Synonyms | Aurin C.I. 43800 Rosolic aci Spirit Aurin 4,4'-Dihydroxyfuchsone Corallin Spirit Soluble Rosolic acid (CI x 43800) CorallinAurinp-Rosolic Acid 4-(p,p′-Dihydroxybenzhydrylidine)-2,5-cyclohexadien-1-one 4-[bis(4-hydroxyphenyl)methylidene]cyclohexa-2,5-dien-1-one 4-[Bis(4-hydroxyphenyl)methylene]-2,5-cyclohexadienone, Aurin |
CAS | 603-45-2 |
EINECS | 210-041-8 |
InChI | InChI=1/C19H14O3/c20-16-7-1-13(2-8-16)19(14-3-9-17(21)10-4-14)15-5-11-18(22)12-6-15/h1-12,20-21H |
Molecular Formula | C19H14O3 |
Molar Mass | 290.31 |
Density | 1.2497 (rough estimate) |
Melting Point | 309°C (decompose) |
Boling Point | 372.4°C (rough estimate) |
Flash Point | 296.2°C |
Water Solubility | Soluble in alcohol, sodium hydroxide, potassium hydroxide and strong acids. Insoluble in water. |
Solubility | Solubility Practically insoluble in water, benzene; freely soluble in ethanol |
Vapor Presure | 2.11E-12mmHg at 25°C |
Appearance | Crystalline Powder |
Color | Red-brown to brownish-red |
Maximum wavelength(λmax) | ['534.6nm, 479.5nm, 482nm'] |
Merck | 14,881 |
BRN | 2055205 |
pKa | 6.98(at 25℃) |
Storage Condition | Store at room temperature. |
Stability | Stable. Incompatible with strong oxidizing agents. |
Refractive Index | 1.4200 (estimate) |
Physical and Chemical Properties | Name of Rose Red acid: Resin acid, Rose Red acid, rose acid, Gold red, deep red crystal, metallic luster. Rose acid also has yellow-brown patches with dark green metal-like. Rose color acid is soluble in alcohol as golden yellow solution, soluble in sodium hydroxide or potassium hydroxide solution as Carmine Red, soluble in concentrated sulfuric acid, 70% Sulfuric acid, hydrochloric acid or perchloric acid is yellow to orange, slightly soluble in glacial acetic acid, slightly soluble in ether and chloroform, practically insoluble in (0.12%) and benzene. |
Hazard Symbols | Xi - Irritant |
Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R36/38 - Irritating to eyes and skin. |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S37/39 - Wear suitable gloves and eye/face protection |
WGK Germany | 3 |
TSCA | Yes |
HS Code | 29145090 |