Molekula
Xylidyl blue I, sodium salt
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Xylidyl blue I, sodium salt is a water-soluble dye used in biochemical assays and staining applications. It is the sodium salt of an azo dye, in which a hydroxynaphthalene carboxanilide is joined by an azo link to a hydroxybenzenesulfonate, with applications in analytical chemistry and histology. Available in powder form, it has a molecular weight of 513.50 g/mol, a molecular formula of C25H20N3NaO6S, and a CAS number of 14936-97-1. Stored at ambient temperature, it requires no hazard labeling.
Molekula supplies Xylidyl blue I, sodium salt at >88% (UV/VIS) purity in 1 g packs, from £93.24 inc. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 6 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
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 — £77.70 per pack ex VAT · £93.24 inc. VAT
Need a different quantity or pack?
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 | Dark violet crystalline powder |
| Solubility | Soluble in water (partly) or aqueous alkaline solutions. |
| Purity | >88% (UV/VIS) |
| Identification (1H-NMR) | Conforms |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
Identification
| Property | Value |
|---|---|
| SKU | 27226364 |
| CAS Number | 14936-97-1 |
| IUPAC Name | sodium 3-[[3-[(2,4-dimethylphenyl)carbamoyl]-2-hydroxynaphthalen-1-yl]diazenyl]-4-hydroxybenzenesulfonate |
| EC Number | 239-012-8 |
| Molecular Formula | C25H20N3NaO6S |
| Molecular Weight | 513.50 |
| Exact Mass | 513.0971 |
| SMILES | CC1=CC(=C(C=C1)NC(=O)C2=CC3=CC=CC=C3C(=C2O)N=NC4=C(C=CC(=C4)S(=O)(=O)[O-])O)C.[Na+] |
| InChIKey | LKSHJHJGLORTGD-UHFFFAOYSA-M |
| InChI | InChI=1S/C25H21N3O6S.Na/c1-14-7-9-20(15(2)11-14)26-25(31)19-12-16-5-3-4-6-18(16)23(24(19)30)28-27-21-13-17(35(32,33)34)8-10-22(21)29;/h3-13,29-30H,1-2H3,(H,26,31)(H,32,33,34);/q;+1/p-1 |
| PubChem CID | 135442960 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 29270040 |
| Tariff Code | 2927000090 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Russian, 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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- MAGON SULFONATE SODIUM SALT
- XB-I; Magonsulfonate
- Xylidyl blue I
- Xylylazo Violet I
- XYLYLAZO VIOLET I [SPECTROPHOTOMETRIC REAGENT FOR MG]
Frequently asked questions
What is Xylidyl blue I, sodium salt used for?
It is primarily used as a metallochromic spectrophotometric reagent for magnesium in analytical chemistry, including colorimetric magnesium assays on serum and urine, and as a dye in biochemical applications.
What is the chemical formula and molecular weight of Xylidyl blue I, sodium salt?
The formula is C25H20N3NaO6S with a molecular weight of 513.50 g/mol.
How should Xylidyl blue I, sodium salt be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade is available for Xylidyl blue I, sodium salt?
It is supplied as a dark violet crystalline powder with a purity of >88% (UV/VIS) and identity confirmed by 1H-NMR.
Can Molekula supply Xylidyl blue I, sodium salt in bulk?
Yes, Molekula can supply Xylidyl blue I, sodium salt in bulk quantities—please contact sales for details.
What documentation comes with an order of Xylidyl blue I, sodium salt?
Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS) upon request.
Where can I buy Xylidyl blue I, sodium salt?
Directly from Molekula, which lists Xylidyl blue I, sodium salt in 1 g packs from £93.24 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
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.