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: 2026-01-13 11:26:37
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) |
 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
SPADNS manufacturer
JSK Chemicals
3Y
Phone:+91-9879767984
Whatsapp: +91-9879767970
product: 23647-14-5 Sulfanilic acid azochromotrop 99%
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