Hydroxy Naphthol Blue Disodium Salt is a synthetic dye that has been used as a calcium indicator, which has a λmax = 650nm.Synonyms:Hydroxy Naphthol Blue Disodium Salt; 3-Hydroxy-4-[(2-hydroxy-4-sulfo-1-naphthalenyl)azo]-2,7-naphthalenedisulfonic Acid Disodium SaltCAS Number:165660-27-5Molecular Formula:C₂₀H₁₂N₂Na₂O₁₁S₃Molecular Weight:598.49Appearance:Supplied as a blue to dark bluish black powder or crystalAbsorptivity (1%/1cm, in ammonia buffer pH 12.0 and 2ml 0.05M ETDA, at 647nm):≥350Storage and Stability:May be stored at RT for short-term only. Long-term storage is recommended at 4°C. Stable for 6 months after receipt. For maximum recovery of product, centrifuge the original vial prior to removing the cap. Light sensitiveImportant Note: This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.Toxicity and Hazards: All products should be handled by qualified personnel only, trained in laboratory procedures.
