Alizarin Red is an orange to brown powder and can be used in a biochemical assay to determine, quantitatively by colorimetry, the presence of calcific deposition by cells of an osteogenic lineage

Biological Staining
pH Indicator

C.I. 58005
Molecular Formula: C14H7O7SNa
Molecular Weight: 342.26
Loss on drying @110degc: <6%
Solubility: Soluble in water at 0.1% – Clear Yellow Solution

Visual Transition Interval:
from pH 3.5 (yellow) to pH 6.5(Pink)
from pH 9.4 (orange) to pH 12.0 (violet)