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SPADNS

SPADNS Structure
SPADNS structure
CAS No.
23647-14-5
Chemical Name:
SPADNS
Synonyms
SPADNS;SpadnsGr;SPADNS reagent;SPADNS SOLUTION;SPADNS extrapure AR;SPADNS, Reagent, ACS;SPADNS extrapure AR, ACS;2,7-naphthalenedisulfonic;Sulfanilic acid azochromtrop;SULFANILIC ACID-AZOCHROMOTROP
CBNumber:
CB8205751
Molecular Formula:
C16H13N2NaO11S3
Molecular Weight:
528.45
MDL Number:
MFCD00003952
MOL File:
23647-14-5.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-05-28 03:29:41
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SPADNS Properties

Melting point >300°C
bulk density 810kg/m3
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.
λmax 505-510 nm
Major Application diagnostic assay manufacturing
hematology
histology
InChIKey AEHGQXKBQBMQEK-GLCFPVLVSA-K
SMILES [Na+].[Na+].[Na+].Oc1cc(cc2cc(c(\N=N\c3ccc(cc3)S([O-])(=O)=O)c(O)c12)S([O-])(=O)=O)S([O-])(=O)=O
FDA UNII 8C9EXU0M2M
EPA Substance Registry System 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[(4-sulfophenyl)azo]-, trisodium salt (23647-14-5)
UNSPSC Code 12352107
NACRES NB.21

SAFETY

Risk and Safety Statements

Symbol(GHS)  Exclamation Mark (GHS07)
GHS07
Signal word  Warning
Hazard statements  H315-H319-H335
Precautionary statements  P261-P280a-P304+P340-P305+P351+P338-P405-P501a-P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313
PPE dust mask type N95 (US), Eyeshields, Gloves
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-36
WGK Germany  3
TSCA  TSCA listed
HS Code  2927 00 00
Storage Class 11 - Combustible Solids
NFPA 704
1
2 0

SPADNS price More Price(28)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich S9256 Sulfanilic acid azochromotrop ≥80% 23647-14-5 10g $65.6 2026-04-30 Buy
Sigma-Aldrich S9256 Sulfanilic acid azochromotrop ≥80% 23647-14-5 25g $142 2026-04-30 Buy
Sigma-Aldrich 1.07998 1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6- disulfonic acid trisodium salt GR for analysis (reagent for fluoride, zirconium, thorium) 23647-14-5 25g $230 2026-04-30 Buy
TCI Chemical D0604 Trisodium 2-(4-Sulfophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonate Hydrate >95.0%(HPLC) 23647-14-5 5g $87 2026-04-30 Buy
TCI Chemical D0604 Trisodium 2-(4-Sulfophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonate Hydrate >95.0%(HPLC) 23647-14-5 25g $253 2026-04-30 Buy
Product number Packaging Price Buy
S9256 10g $65.6 Buy
S9256 25g $142 Buy
1.07998 25g $230 Buy
D0604 5g $87 Buy
D0604 25g $253 Buy

SPADNS Chemical Properties, Uses, Production

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.

SPADNS Preparation Products And Raw materials

Raw materials

Preparation Products

SPADNS Suppliers

Global Suppliers ( 190)
Supplier Tel Email Country ProdList Advantage
J & K SCIENTIFIC LTD. 18210857532 18210857532 jkinfo@jkchemical.com China 96815 76
Meryer (Shanghai) Chemical Technology Co., Ltd. 4006356688 18621169109 market03@meryer.com China 40202 62
Alfa Aesar 400-6106006 saleschina@alfa-asia.com China 30103 84
TCI (Shanghai) Development Co., Ltd. 021-67121386 Sales-CN@TCIchemicals.com China 24512 81
Energy Chemical 400-0056266 sales8178@energy-chemical.com China 44850 61
Shandong Xiya Chemical Co., Ltd 13355009207 13355009207 3007715519@qq.com China 18722 57
Spectrum Chemical Manufacturing Corp. 021-021-021-67601398-809-809-809 15221380277 marketing_china@spectrumchemical.com China 9643 60
Thermo Fisher Scientific 800-810-5118 cnchemical@thermofisher.com China 17752 75
Beijing innoChem Science & Technology Co.,Ltd. 400-810-7969 010-59572699 ningzi.li@inno-chem.com.cn China 6122 55
TOKYO CHEMICAL INDUSTRY CO., LTD. 03-36680489 Sales-JP@TCIchemicals.com Japan 28364 80
Supplier Advantage
J & K SCIENTIFIC LTD. 76
Meryer (Shanghai) Chemical Technology Co., Ltd. 62
Alfa Aesar 84
TCI (Shanghai) Development Co., Ltd. 81
Energy Chemical 61
Shandong Xiya Chemical Co., Ltd 57
Spectrum Chemical Manufacturing Corp. 60
Thermo Fisher Scientific 75
Beijing innoChem Science & Technology Co.,Ltd. 55
TOKYO CHEMICAL INDUSTRY CO., LTD. 80

View Latest Price from SPADNS manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
SPADNS pictures 2026-06-30 SPADNS
23647-14-5
 1KG 98 10000KGS Shaanxi Dideu New Materials Co. Ltd
SPADNS pictures 2019-08-09 SPADNS
23647-14-5
 $1.00 1KG 98% 1kg,5kg,100kg Career Henan Chemical Co
  • SPADNS pictures
  • SPADNS
    23647-14-5
  • 98
  • Shaanxi Dideu New Materials Co. Ltd
  • SPADNS pictures
  • SPADNS
    23647-14-5
  • $1.00
  • 98%
  • Career Henan Chemical Co

SPADNS Spectrum

SPADNS(23647-14-5)IR1SPADNS(23647-14-5)IR2

23647-14-5 (SPADNS) Related Search:

Trisodium naphthalene-1,3,6-trisulphonate (Ethylenedinitrilo)tetraacetic acid, trisodium salt hydrate Nitrilotriacetic acid trisodium salt monohydrate N,N-Bis(carboxylatomethyl)alanine trisodium salt 1,8-Dihydroxynaphthylene-3,6-disulfonic acid
Disodium 3-aminonaphthalene-2,7-disulphonate CHROMOTROPE 2R 3-Hydroxythiophenol 2,7-Naphthalenedisulfonic acid disodium salt Sodium 5-hydroxynaphthalene-1-sulphonate
6-Amino-4-hydroxy-2-naphthalenesulfonic acid Naphthalene-2-sulfonic acid Sulfanilic acid Naphthalene-2,7-disulfonic acid Sodium sulfanilate
p-Phenylazobenzenesulfonic acid Chromotropic acid disodium salt Chromotropic acid sodium salt

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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 SULFANILIC ACID-AZOCHROMOTROP SULFANILIC ACID AZOCHROMOTROPE TRISODIUM 2-(4-SULFOPHENYLAZO)-1,8-DIHYDROXYNAPHTHALENE-3,6-DISULFONATE p-Sulfophenylazochromotropic acid trisodium salt Sulphanilic acid azochromotrope~2-(4-Sulphophenylazo)chromotropic acid trisodium salt trisodium 4,5-dihydroxy-3-(4-sulphonatophenylazo)naphthalene-2,7-disulphonate 2(4-SULFOPHENYLAZO)1,8-DIHYDROXY-3,6-NAP HT HALENEDISULFONIC ACID, 3NA SALT,IND SULFANILIC ACID AZOCHROMOTROP FOR & SpadnsGr-(2-(P-SulphophenylAzo)1,8-Dihydroxynaphelene-3,6-DisulphonicAcidTrisodiumSalt) SpadnsGr 1,8-DIHYDROXY-2-(4-SULFOPHENYLAZO)NAPHTHALENE-3,6-DISULFONICACID 2-(4-Sulfophenylazo)1,8-dihydroxy-3,6-naphthalenedisulfonic acid, trisodium salt, indicator grade 4,5-DIHYDROXY-3-(P-SULFOPHENYLAZO)-2,7-NAPHTHALENE DISULFONIC ACID, TRISODIUM SALT 4,5-DIHYDROXY-3-(4-SULFOPHENYLAZO)-2,7-NAPHTHALENEDISULFONIC ACID TRISODIUM SALT 3-(4-SULFOPHENYLAZO)-4,5-DIHYDROXY-2,7-NAPHTHALENEDISULFONIC ACID TRISODIUM SALT 2-(P-SULFOPHENYLAZO)-1,8-DIHYDROXY-3,6-NAPHTHALENEDISULFONIC ACID TRISODIUM SALT 2-(P-SULFOPHENYLAZO)1,8-DIHYDROXY-3,6 NAPHTHALENE TRISODIUM SALT 2-(P-SULFOPHENYLAZO)-1,8-DIHYDROXY-NAPHTHALENE-3,6-DISULFONIC ACID TRISODIUM SALT 2-(4-SULFOPHENYLAZO)-1,8-DIHYDROXY-3,6-NAPHTHALENEDISULFONIC ACID TRISODIUM SALT 2-(p-SULFOPHENYLAZO)-1,8-DIHYDROXY-3,6-NAPH- THALENEDISULFONIC ACID SPADNS SOLUTION 1,8-DIHYDROXY-2-(4-SULFOPHENYLAZO)NAPHTHALENE-3,6-DISULFONIC ACID TRISODIUM SALT 2-(p-Sulfophenylazo)chromotrop 2,7-naphthalenedisulfonic 2,7-naphthalenedisulfonicacid,4,5-dihydroxy-3-((4-sulfophenyl)azo)-,trisodium 2,7-naphthalenedisulfonicacid,4,5-dihydroxy-3-((4-sulfophenyl)azo)-,trisodiumsalt 2,7-Naphthalenedisulfonicacid,4,5-dihydroxy-3-[(4-sulfophenyl)azo]-,trisodiumsalt 7-naphthalenedisulfonicacid,4,5-dihydroxy-3-[(4-sulfophenyl)azo]-trisodiu 1,8-Dihydroxy-2-(4-sulfobenzeneazo)-3,6-naphthalenedisulfonic acid trisodiu 2-(4-SULFOPHENYLAZO)1,8-DIHYDROXY-3,6-NAPHTHALENEDISULFONIC ACID TRISODIUM SALT (SPADNS) Trisodium 1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6-disulfonate Trisodium 2-(4-Sulfophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonate Hydrate 2-(P-SULFOPHENYLAZO)1,8-DIHYDROXY-3,6-NAPHTHALENE 4,5-DIHYDROXY-3-(P-SULFOPHENYLAZO)-2,7-NAPHTHALENEDISULFONIC ACID SPADNS extrapure AR 2-(4-Sulfophenylazo)chromotropic acid trisodium salt, SPADNS, 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, Sulfanilic acid azochromotrop, 1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6-disulfonic acid trisodium salt 2-(4-Sulfophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonic acid 3-(4-Sulfophenylazo)-4,5-dihydroxy-2,7-naphthalenedisulfonic acid 3-[(4-Sulfophenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid 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 SPADNS reagent SPADNS, REAGENT (ACS)SPADNS, REAGENT (ACS)SPADNS, REAGENT (ACS) Trisodium2-(4-Sulfophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonateHydrate> 2-(4-Sulfonylphenyl azochromic acid trisodium salt, indicator