Synonyms: 3,4-Dihydroxy-9,10-dioxo-2-anthracenesulfonic acid sodium salt, Alizarin Carmine, Alizarin Red water soluble, Alizarin sodium monosulfonate, Alizarin sulfonate sodium, Alizarinsulfonic acid sodium salt, Sodium alizarinsulfonate, C.I. 58005
CAS: 130-22-3
Empirical Formula: C14H7NaO7S
Molecular Weight: 342.26 g/mol
TestSpecification
DescriptionYellow to orange to brown powder
Identification (IR)Conforms to structure and standard
Assay70% min.
Loss on Drying at 110 °C6% max.
SpectroscopyAs per BSC
Solubility (0.1% in H2O)Clear yellow solution
Solubility (1.0g/L in H2O)6 NTU
Visual Transition IntervalFrom pH 3.5 (yellow) to pH 6.5 (pink) and from pH 9.4 (orange-brown) to pH 12.0 (violet)