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HomeProduct name listSPADNS

SPADNS

Synonym(s):1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6- disulfonic acid trisodium salt;1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6-disulfonic acid trisodium salt;2-(4-Sulfophenylazo)-1,8-dihydroxy-3,6-naphthalene disulfonic acid trisodium salt;2-(4-Sulfophenylazo)chromotropic acid trisodium salt;SPADNS

  • CAS NO.:23647-14-5
  • Empirical Formula: C16H13N2NaO11S3
  • Molecular Weight: 528.45
  • MDL number: MFCD00003952
  • EINECS: 245-803-9
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2023-04-23 13:52:06
SPADNS Structural

What is SPADNS?

Chemical properties

dark red-brown crystalline powder

The Uses of SPADNS

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.

What are the applications of Application

Sulfanilic acid azochromotrop is an indicator for Zr and Th complexation

Properties of SPADNS

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)

Safety information for SPADNS

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H315:Skin corrosion/irritation
H319:Serious eye damage/eye irritation
H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes P261:Avoid breathing dust/fume/gas/mist/vapours/spray.
P264:Wash hands thoroughly after handling.
P264:Wash skin thouroughly after handling.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405:Store locked up.

Computed Descriptors for SPADNS

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