SPADNS

Product Name: SPADNS
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
Formula Weight: 528.45
MOL File: 23647-14-5.mol

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SPADNS Property

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
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

Hazard Codes: Xi
Risk Statements: 36/37/38
Safety Statements: 26-36
WGK Germany: 3
TSCA: Yes
HS Code: 2927 00 00

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: S9256
Product name: Sulfanilic acid azochromotrop
Purity: ≥80%
Packaging: 10g
Price: $63
Updated: 2025/07/31

Sigma-Aldrich

Product number: S9256
Product name: Sulfanilic acid azochromotrop
Purity: ≥80%
Packaging: 25g
Price: $128.93
Updated: 2025/07/31

Sigma-Aldrich

Product number: 1.07998
Product name: 1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6- disulfonic acid trisodium salt
Purity: GR for analysis (reagent for fluoride, zirconium, thorium)
Packaging: 25g
Price: $256
Updated: 2025/07/31

TCI Chemical

Product number: D0604
Product name: Trisodium 2-(4-Sulfophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonate Hydrate
Purity: >95.0%(HPLC)
Packaging: 5g
Price: $85
Updated: 2025/07/31

TCI Chemical

Product number: D0604
Product name: Trisodium 2-(4-Sulfophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonate Hydrate
Purity: >95.0%(HPLC)
Packaging: 25g
Price: $247
Updated: 2025/07/31

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SPADNS Chemical Properties,Usage,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

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SPADNS Suppliers

Americas 1 Austria 1 Belgium 1 Canada 2 China 76 Europe 3 France 1 Germany 4 India 40 Japan 5 Poland 1 South Korea 2 Switzerland 2 United Kingdom 12 United States 39 Global 190

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View Lastest Price from SPADNS manufacturers

Career Henan Chemical Co

Product: SPADNS 23647-14-5
Price: US $1.00/KG
Min. Order: 1KG
Purity: 98%
Supply Ability: 1kg,5kg,100kg
Release date: 2019-08-08

23647-14-5, SPADNSRelated 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 CHROMOTROPIC ACID DISODIUM SALT 2,7-Naphthalenedisulfonic acid disodium salt Sodium 5-hydroxynaphthalene-1-sulphonate 6-Amino-4-hydroxy-2-naphthalenesulfonic acid Naphthalene-2-sulfonic acid CHROMOTROPIC ACID SODIUM SALT Sulfanilic acid SODIUM SULFANILATE Naphthalene-2,7-disulfonic acid 3-Hydroxythiophenol CHROMOTROPE 2R Disodium 3-aminonaphthalene-2,7-disulphonate 1,8-Dihydroxynaphthylene-3,6-disulfonic acid P-PHENYLAZOBENZENESULFONIC ACID

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&gt

2-(4-Sulfonylphenyl azochromic acid trisodium salt, indicator