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SPADNS

Basic information Safety Supplier Related

SPADNS Basic information

Product Name:
SPADNS
Synonyms:
  • 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
  • SPADNS 4,5-Dihydroxy-3-(4-sulfophenylazo)-2,7-naphthalenedisulfonic Acid Trisodium Salt Trisodium 1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6-disulfonate 1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6-disulfonic Acid Trisodium Salt
  • 1,8-DIHYDROXY-2-(4-SULFOPHENYLAZO)NAPHTH
  • SPADNS, Reagent, ACS
  • 2-(4-Sulfophenylazo)chroMotropic acid trisodiuM salt, indicator
  • 1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6- disulfonic acid trisodium salt GR for analysis (reagent for fluoride, zirconium, thorium)
  • SPADNS
CAS:
23647-14-5
MF:
C16H13N2NaO11S3
MW:
528.45
EINECS:
245-803-9
Product Categories:
  • Analytical Chemistry
  • Azo Compounds
  • Organics
  • Chelating Reagents
  • Naphthylazo Compounds
Mol File:
23647-14-5.mol
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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
PH
6.0 (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 System
2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[(4-sulfophenyl)azo]-, trisodium salt (23647-14-5)
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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

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SPADNS Usage And Synthesis

Chemical Properties

dark red-brown crystalline powder

Uses

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.

SPADNSSupplier

J & K SCIENTIFIC LTD.
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010-82848833 400-666-7788
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Meryer (Shanghai) Chemical Technology Co., Ltd.
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Alfa Aesar
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400-6106006
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TCI (Shanghai) Development Co., Ltd.
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Energy Chemical
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021-58432009 400-005-6266
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sales8178@energy-chemical.com