SPADNS

SPADNS Basic information
Product Name:SPADNS
Synonyms:4,5-Dihydroxy-3-(4-sulfophenylazo)naphthalene-2,7-disulfonic acid;4,5-Dihydroxy-3-[(4-sulfophenyl)azo]-2,7-naphthalenedisulfonic acid;3-[[4-(Sodiooxysulfonyl)phenyl]azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid disodium salt;Sulfanilic acid azochromtrop;2-(4-Sulfophenylazo)1,8-dihydroxy-3,6-naphthalenedisulfonic acid, trisodium salt,indicator;2-(4-Sulfophenylazo)1,8-dihydroxy-3,6-naphthalenedisulfonic acid;2-(4-Sulfophenylazo)1,8-dihydroxy-3,6-naphthalenedisulfonic acid, trisodiuM salt, indicator grade 10GR;2-(4-Sulfophenylazo)1,8-dihydroxy-3,6-naphthalenedisulfonic acid, trisodiuM salt, indicator grade 25GR
CAS:23647-14-5
MF:C16H13N2NaO11S3
MW:528.45
EINECS:245-803-9
Product Categories:Analytical Chemistry;Azo Compounds;Chelating Reagents;Naphthylazo Compounds;Organics
Mol File:23647-14-5.mol
SPADNS Structure
SPADNS Chemical Properties
Melting point >300°C
storage temp. Store at +15°C to +25°C.
solubility 220g/l
form Crystalline Powder
color Dark red-brown
PH6.0 (10g/l, H2O, 22℃)
Water Solubility Soluble in water (10 mg/ml), and ethanol (1 mg/ml). very slightly soluble or insoluble in alcohol and organic solvents.
EPA Substance Registry System2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[(4-sulfophenyl)azo]-, trisodium salt (23647-14-5)
Safety Information
Hazard Codes Xi
Risk Statements 36/37/38
Safety Statements 26-36
WGK Germany 3
TSCA Yes
HS Code 2927 00 00
MSDS Information
ProviderLanguage
ACROS English
SigmaAldrich English
ALFA English
SPADNS Usage And Synthesis
Chemical Propertiesdark red-brown crystalline powder
UsesSulfanilic 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.
SPADNS Preparation Products And Raw materials
2,7-Naphthalenedisulfonic acid disodium salt SODIUM SULFANILATE CHROMOTROPIC ACID SODIUM SALT 1-Naphthol-3,6-disulfonic acid disodium salt 3-AMINO-2,7-NAPHTHALENEDISULFONIC ACID MONOSODIUM SALT 6-Amino-4-hydroxy-2-naphthalenesulfonic acid Naphthalene-2,7-disulfonic acid Sodium 5-hydroxynaphthalene-1-sulphonate 2-AMINO-1-NAPHTHOL Disodium 3-aminonaphthalene-2,7-disulphonate 8-Hydroxy-2-naphthylamine-3,6-disulfonic acid DI-SNADNS 1,8-Dihydroxynaphthylene-3,6-disulfonic acid 2,7-NAPHTHALENEDITHIOL 3-Hydroxythiophenol CHROMOTROPIC ACID DISODIUM SALT 1-NAPHTHOL-3-SULFONIC ACID SODIUM SALT amino-R acid

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