Molekula
DAOS (N-Ethyl-N-(2-hydroxy-3-sulfopropyl)-3,5-dimethoxyaniline, 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
DAOS is a water-soluble sulfonated aniline derivative used as a chromogenic reagent in biochemical assays and analytical chemistry. It functions as a colorimetric indicator in detection systems requiring high sensitivity and stability. Available in powder form with a molecular weight of 341.36 g/mol, CAS number 83777-30-4, and molecular formula C13H20NO6S·Na. Stable at ambient temperature with no signal word assigned. Molekula supplies DAOS 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.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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1 g — £97.50 per pack ex VAT · £117.00 inc. VAT
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Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Solid |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 30235305 |
| CAS Number | 83777-30-4 |
| IUPAC Name | sodium 3-(N-ethyl-3,5-dimethoxyanilino)-2-hydroxypropane-1-sulfonate |
| Molecular Formula | C13H20NO6S·Na |
| Molecular Weight | 341.36 |
| Exact Mass | 341.0909 |
| SMILES | CCN(CC(CS(=O)(=O)[O-])O)C1=CC(=CC(=C1)OC)OC.[Na+] |
| InChIKey | HDARHUHTZKLJET-UHFFFAOYSA-M |
| InChI | InChI=1S/C13H21NO6S.Na/c1-4-14(8-11(15)9-21(16,17)18)10-5-12(19-2)7-13(6-10)20-3;/h5-7,11,15H,4,8-9H2,1-3H3,(H,16,17,18);/q;+1/p-1 |
| PubChem CID | 23677928 |
| REACH Code | Y113 |
| Tariff Code | 2922500090 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
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
No alternate names recorded for this product.
Frequently asked questions
What is DAOS used for?
DAOS is a Trinder-type hydrogen donor used as a chromogenic reagent in biochemical assays and analytical chemistry. In the presence of peroxidase and hydrogen peroxide, it undergoes oxidative coupling with 4-aminoantipyrine to form a colored quinoneimine dye, which is used to measure hydrogen peroxide or enzymatic activity, for example in oxidase-coupled assays for clinical analytes such as glucose, cholesterol and uric acid.
What is the chemical formula and molecular weight of DAOS?
The formula is C13H20NO6S·Na with a molecular weight of 341.36 g/mol.
How should DAOS be stored?
DAOS should be stored at ambient temperature, protected from moisture and light.
What grade of DAOS is available?
Molekula supplies DAOS in analytical grade.
Can Molekula supply DAOS in bulk?
Yes, Molekula can supply DAOS in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with a DAOS order?
Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS) 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.