SPADNS

CAS: 23647-14-5

Ref. 02-A16933

Product Information

• Name: SPADNS
• Synonyms: trisodium (3E)-5-hydroxy-4-oxo-3-[2-(4-sulfonatophenyl)hydrazin-1-ylidene]naphthalene-2,7-disulfonate, 1,8-Dihydroxy-2-[4-sulfophenylazo]-naphthalene-3,6-disulfonic acid, 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[(4-sulfophenyl)azo]-, trisodium salt, 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[(p-sulfophenyl)azo]-, trisodium salt, 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[2-(4-sulfophenyl)diazenyl]-, sodium salt (1:3), 2-(4-Sulphophenylazo)chromotropic acid trisodium salt, 3-(4-Sulfophenylazo)-4,5-dihydroxynaphthalene-2,7-disulfonic acid trisodium salt, 4,5-Dihydroxy-3-(4-sulfophenylazo)-2,7-naphthalenedisulfonic acid, trisodium salt, 5-Hydroxy-4-Oxo-3-[(4-Sulfonatophenyl)Hydrazono]-3,4-Dihydronaphthalene-2,7-Disulfonate, Spadns, Sulphanilic acid azochromotrope, Trisodium 2-(p-sulfophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonate, Trisodium 4,5-Dihydroxy-3-(4-Sulphonatophenylazo)Naphthalene-2,7-Disulphonate, p-Sulfophenylazochromotropic acid trisodium salt, trisodium (3E)-5-hydroxy-4-oxo-3-[(4-sulfonatophenyl)hydrazono]-3,4-dihydronaphthalene-2,7-disulfonate, trisodium (3Z)-5-hydroxy-4-oxo-3-[(4-sulfonatophenyl)hydrazono]-3,4-dihydronaphthalene-2,7-disulfonate
• CAS: 23647-14-5

Description

Sulfanilic acid azochromotrop is used as an indicator for complexometric determinations of zirconium and thorium. It is used as a reagent for drinking and wastewater analysis using Hach Method 8029, Fluoride, SPADNS Method. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

• Brand: Alfa Aesar By Thermo Fisher Scientific

Chemical properties

• Molecular weight: 570.40
• Formula: C₁₆H₉N₂Na₃O₁₁S₃
• Color/Form: Dark red to brown to dark brown, Crystals or powder or crystalline powder
• InChI key: LSAWBVPBZOEGOT-ZOVWSQMSSA-K