Molekula
Diphenylamine-4-sulfonic acid sodium salt
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Diphenylamine-4-sulfonic acid sodium salt is a sodium salt of diphenylamine-4-sulfonic acid, used in dye synthesis and as a reagent in analytical chemistry. In the laboratory it serves as an oxidation-reduction indicator in titrations and as a reagent for the colorimetric determination of nitrates. It appears as a white to pale yellow crystalline powder. CAS: 6152-67-6, Molecular formula: C12H10NNaO3S, Molecular weight: 271.27 g/mol, Storage: Ambient, Signal word: Warning. Molekula supplies Diphenylamine-4-sulfonic acid sodium salt from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
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5 g — £43.40 per pack ex VAT · £52.08 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | Powder |
| Residue on Ignition | 26% |
| Sulphates (SO4)(2-) | <0.5% |
| Chlorine (Cl) | <0.5% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 34781230 |
| CAS Number | 6152-67-6 |
| IUPAC Name | sodium 4-anilinobenzenesulfonate |
| EC Number | 228-165-6 |
| Molecular Formula | C12H10NNaO3S |
| Molecular Weight | 271.27 |
| Exact Mass | 271.0279 |
| SMILES | C1=CC=C(C=C1)NC2=CC=C(C=C2)S(=O)(=O)[O-].[Na+] |
| InChIKey | DGXTZMPQSMIFEC-UHFFFAOYSA-M |
| InChI | InChI=1S/C12H11NO3S.Na/c14-17(15,16)12-8-6-11(7-9-12)13-10-4-2-1-3-5-10;/h1-9,13H,(H,14,15,16);/q;+1/p-1 |
| PubChem CID | 517002 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 29214470 |
| Tariff Code | 2921440090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Benzenesulfonic acid, 4-(phenylamino)-, monosodium salt
- Benzenesulfonic acid, 4-(phenylamino)-, sodium salt (1:1)
- N-Phenylsulfanilic acid, sodium salt
- SDPAS
- Sodium 4-(phenylamino)benzenesulfonate
- Sodium dianilinosulphonate
- Sodium diphenylamine-4-sulfonate
- Sodium N-phenylsulphanilate
- sodium;4-anilinobenzenesulfonate
- Sulfanilic acid, N-phenyl-, sodium salt
Frequently asked questions
What is Diphenylamine-4-sulfonic acid sodium salt used for?
It is primarily used as a redox indicator in analytical chemistry, for example in the titration of iron(II) with potassium dichromate, where it gives a sharp color change to violet at the endpoint.
What is the chemical formula and molecular weight?
The formula is C12H10NNaO3S with a molecular weight of 271.27 g/mol.
How should it be stored?
Store at ambient temperature, protected from moisture and light.
What grade is available?
Available in technical grade; custom purity options may be available upon request.
Can Molekula supply it in bulk?
Yes, bulk quantities are available—please contact our sales team for pricing and availability.
What documentation comes with the order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS); additional documentation can be provided upon request.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.