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
New Products
Cyclopentane-1,2-dione 2,6-Dibromoaniline (RS)-beta-Amino-beta-(4-bromophenyl)propionic acid 1-AMino-cyclobutaneMethanol HCl TETRABUTYLAMMONIUM CYANIDE 3-Amino-3-(3-fluorophenyl)propanoic acid 3-Amino-3-(4-methylphenyl)propionic acid 3-AMINO-3-(3-CHLORO-PHENYL)-PROPIONIC ACID Cefuroxime EP Impurity-A N-Nitroso hydroxy Cetrizine EP Impurity-A Noradrenaline EP Impurity D/Noradrenaline Methyl Ether Cetirizine EP Impurity A/Cetirizine CBHP Impurity Lantanoprost rc B Clidinium Bromide Impurity 4 - fluoro- 2 - methoxy- 5 - nitroaniline 1-(2-amino-5-hydroxy phenyl)propan-1-one tert-butyl 4-(6-((7-cyclo pentyl -6-(dimethyl carbamoyl) -7H-pyrrolo [2,3-d]pyrimidin-2-yl) amino)pyridin-3-yl) piperazine-1-carboxylate 2-amino-5-nitrobenzonitrile (4-Fluoro-2-methoxy-5-nitro- phenyl)-[4- (1-methyl-1H- indol-3- yl)-pyrimidin-2-yl]- amine (3R,4R)-1-benzyl-N,4-dimethylpiperidin-3- amine 2-Chloro Benzylcyanide 3,4 Diethoxy Benzylcyanide 3,4 Dimethoxy Benzylcyanide 3-chlorobenzyl cyanideRelated products of tetrahydrofuran
You may like
-
23647-14-5 2-(4-Sulfophenylazo)-1,8-dihydroxy-3,6-naphthalenedisulfonic acid trisodium salt 98%View Details
23647-14-5 -
SPADNS CAS 23647-14-5View Details
23647-14-5 -
SPADNS, extra spezial, GR CAS 23647-14-5View Details
23647-14-5 -
SPADNS extrapure AR CAS 23647-14-5View Details
23647-14-5 -
Trisodium 2-(4-Sulfophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonate CAS 23647-14-5View Details
23647-14-5 -
SPADNS, GR (a complexometric indicator for zirconium, thorium & fluoride) CAS 23647-14-5View Details
23647-14-5 -
Sulfanilic acid azochromotrop CAS 23647-14-5View Details
23647-14-5 -
SPADNS AR CAS 23647-14-5View Details
23647-14-5
Statement: All products displayed on this website are only used for non medical purposes such as industrial applications or scientific research, and cannot be used for clinical diagnosis or treatment of humans or animals. They are not medicinal or edible.