Basic information
- CAS
23647-14-5- Standard SMILES
O=S(=O)([O-])c1ccc(N=Nc2c(S(=O)(=O)[O-])cc3cc(S(=O)(=O)[O-])cc(O)c3c2O)cc1.[Na+].[Na+].[Na+]- InChIKey
AEHGQXKBQBMQEK-UHFFFAOYSA-K- Molecular formula
- C16H9N2Na3O11S3
- Average molar mass
- 570.4 g/mol
- Monoisotopic mass
- 569.90615547
Names & identifiers
- Preferred name
- Spadns
- IUPAC
- trisodium;4,5-dihydroxy-3-[(4-sulfonatophenyl)diazenyl]naphthalene-2,7-disulfonate
- English name
- SPADNS
- Molecular formula
- C16H13N2NaO11S3
- Molecular weight
- 528.45
Names & synonyms
SPADNSSPADNS [MI]EINECS 245-803-92,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[(4-sulfophenyl)azo]-, trisodium saltDTXSID3066920Trisodium 4,5-dihydroxy-3-(4-sulphonatophenylazo)naphthalene-2,7-disulphonate2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-((4-sulfophenyl)azo)-, trisodium salt2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-(2-(4-sulfophenyl)diazenyl)-, sodium salt (1:3)4,5-DIHYDROXY-3-(2-(4-SULFOPHENYL)DIAZENYL)-2,7-NAPHTHALENEDISULFONIC ACID SODIUM SALT (1:3)2(4Sulfophenylazo)chromotropic acid trisodium salt4,5Dihydroxy32,7naphthalenedisulfonic acid trisodium salt4,5Dihydroxy32,7naphthalenedisulfonic acid sodium salt (1:3)
Show more names
SpadnsGrSPADNS reagentSPADNS SOLUTIONSPADNS extrapure ARSPADNS, Reagent, ACSSPADNS extrapure AR, ACS2,7-naphthalenedisulfonicSulfanilic acid azochromtropSULFANILIC ACID-AZOCHROMOTROP
Trisodium 2(psulfophenylazo)1,8dihydroxynaphthalene3,6disulfonate1,8Dihydroxy2(4sulfophenylazo)naphthalene3,6disulfonic acid trisodium salt2(4Sulfophenylazo)1,8dihydroxy3,6napthalenedisulfonic acid trisodium salt2,7Naphthalenedisulfonic acid, 4,5dihydroxy3((4sulfophenyl)azo), trisodium salt2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[2-(4-sulfophenyl)diazenyl]-, sodium salt (1:3)RefChem:888474DTXCID6036916Trisodium 4,5dihydroxy3(4sulphonatophenylazo)naphthalene2,7disulphonate
Properties
Computed structural properties
- Topological polar surface area
- 262 Ų
- Hydrogen bond donors
- 2
- Hydrogen bond acceptors
- 13
- Rotatable bonds
- 2
- Heavy atoms
- 35
- Formal charge
- 0
- Complexity
- 979
Experimental & physicochemical properties
Chemical ClassesDyes -> Azo Dyes
Physical DescriptionRed solid; [Merck Index] Dark red powder; [Sigma-Aldrich MSDS]
Physicochemical properties
- Melting point
- 300 °C · >300°C
- bulk density
- 810 kg/m3 · 810kg/m3
- storage temp.
- 15 °C · Store at +15°C to +25°C.
- solubility
- 220 g/l · 220g/l
- form
- Crystalline Powder
- color
- Dark red-brown
- PH
- 6 · 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 · 505-510 nm
- Major Application
- diagnostic assay manufacturinghematologyhistology
- InChIKey
- AEHGQXKBQBMQEK-GLCFPVLVSA-K
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
GHS classification
GHS Classification
This chemical does not meet GHS hazard criteria for 47.7% (41 of 86) of reports.
Warning
H315 (52.3%): Causes skin irritation [Warning Skin corrosion/irritation]
P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 86 reports by companies from 7 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Hazard information
Regulatory Information
Chemical: 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[(4-sulfophenyl)azo]-, trisodium salt
1,8-Dihydroxy-2-(4-sulphophenylazo) napthalene-3,6-disulphonic acid trisodium salt: Does not have an individual approval but may be used under an appropriate group standard
Other Safety InformationIMAP assessments - 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[(4-sulfophenyl)azo]-, trisodium salt: Human health tier I assessment
Hazards SummaryAn irritant; [Merck Index] A skin and strong eye irritant; [Sigma-Aldrich MSDS]
Hazard Classes and CategoriesSkin Irrit. 2 (52.3%)
Safety data
- PPE
- dust mask type N95 (US), Eyeshields, Gloves
- wgk
- 3
- tsca
- TSCA listed
- hs_code
- 2927 00 00
- risk_code
Chemistry & industry
Uses & manufacturing
UsesUsed as a chromogenic indicator for spectrophotometric determination of metal ions and fluoride ions; [Merck Index]
General Manufacturing Information2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[2-(4-sulfophenyl)diazenyl]-, sodium salt (1:3): ACTIVE
Applications
UsesSulfanilic 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.
Suppliers56 total
梯希爱(上海)化成工业发展有限公司021-67121386 · [email protected]
阿诺西（上海）生物技术有限公司400-1107768 15058188853 · [email protected]
上海阿拉丁生化科技股份有限公司400-6206333 13167063860 · [email protected]
北京诺德恒信化工技术有限公司010-84929330 13811281791 · [email protected]
广州纳珑化工有限公司13192879270; 13192879270 · [email protected]
上海麦克林生化科技股份有限公司021-50706066 15221275939 · [email protected]
江苏艾康生物医药研发有限公司025-025-66113011 15955137747 · [email protected]
上海仲因实业有限公司2537653158 16621191650 · [email protected]
Related reactions
0 records
No reaction records under the current filter.
Compound notes
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