Check the listing for details. Alizarin Red S, 70+% (Dye Content), 25g. Condition: New. Listed at 38.95 USD. Alizarin Red S, 70+% (Dye Content), 25gFor Research & DevelopmentNot for drug, human, animal, or food useSpecifications:Appearance (Color) Yellow to orange to brownAppearance (Form) PowderIdentification (IR) Conforms to structure and standardAssay (Dye Content) 70+%Loss on Drying @ 110 °C 6% maximumSpectroscopy Peak 596nm, ratio 0.98 @ 542/572nm Density @ peak 0.579 auSolubility (0.1% in H2O) Clear yellow solutionSolubility (1.0g/L in H2O) 6 NTUVisual Transition Interval From pH 3.5 (yellow) to pH 6.5 (pink) and from pH 9.4 (orange-brown) to pH 12.0 (violet)Satisfactory in: Dahl's method for staining soft tissue calcification.Synonyms: C.I. 58005CAS: 130-22-3FORMULA: C14H7NaO7SThis item will be shipped in accordance with FedEx/UPS carriers, per DOT 49CFR regulations, which will meet or exceed all of USPS regulations per 49CFR 172.101, published in Federal Register 10742. Note: eBay please do not delist.