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VAQORAp-Xylenol blue, GR
Synonyms: p-Xylenolsulfonephthalein · Xylenol Blue · p-Xylenolsulfonphthalein · p-Xylenesulfonephthalein
CAS No.125-31-5
FormulaC23H22O5S
Mol. weight410.50
Catalogue No.VQ-000676
Purity≥90%
HSN32049000
p-Xylenol blue (CAS 125-31-5) – biological stain, AR grade, ≥90%. C23H22O5S, MW 410.5. Request a quote: COA, bulk packs and worldwide export.
Batch COA with every lot
16-section GHS SDS
Export to 120+ countries
DG-compliant packing
About p-Xylenol blue, GR
Listed under CAS 125-31-5, p-Xylenol blue is a biological stain available from Vaqora Chemicals in AR grade, specified at ≥90% purity. The compound has the formula C23H22O5S, corresponding to a molecular weight of 410.5 g/mol. Systematically, it is named 4-[3-(4-hydroxy-2,5-dimethylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-2,5-dimethylphenol. It is also known as p-Xylenolsulfonephthalein or Xylenol Blue.
The product is provided as a powder. Reported physical data include a melting point of 212 °C (dec.). Store in a tightly closed container in a cool, dry and well-ventilated place. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.
Key uses span histology and cytology staining, microscopy, clinical laboratories and indicator for titrations. Buyers come mainly from academic and industrial research, diagnostics and biotechnology and textiles and dyeing.
Standard pack sizes are 1 g, 5 g, 100 g and 1 kg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.
Typical applications
- Histology & cytology staining
- Microscopy
- Clinical laboratories
- Indicator for titrations
Industries
Grade guides
Specifications & identifiers
| Product name | p-Xylenol blue, GR |
|---|---|
| Catalogue No. | VQ-000676 |
| CAS Number | 125-31-5 |
| IUPAC name | 4-[3-(4-hydroxy-2,5-dimethylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-2,5-dimethylphenol |
| Molecular formula | C23H22O5S |
| Molecular weight | 410.5 g/mol |
| Exact mass | 410.1188 |
| Grade | AR |
| Purity / assay | ≥90% |
| HSN code | 32049000 |
| InChIKey | MGUKYHHAGPFJMC-UHFFFAOYSA-N |
| SMILES | CC1=CC(=C(C=C1O)C)C2(C3=CC=CC=C3S(=O)(=O)O2)C4=C(C=C(C(=C4)C)O)C |
| PubChem CID | 67172 |
| Physical form | Powder |
|---|---|
| Appearance | Powder |
| Melting point | 212 °C (dec.) |
| LogP (XLogP3) | 4.5 |
| H-bond donors / acceptors | 2 / 5 |
| TPSA | 92.2 Ų |
| Synonyms | p-Xylenolsulfonephthalein, Xylenol Blue, p-Xylenolsulfonphthalein, p-Xylenesulfonephthalein, p-Xylenolsulfophthalein, 1,4-Dimethyl-5-hydroxybenzenesulfonphthalein, 1,4-dimethyl-5-hydroxybenzenesulfonephthalein, Phenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis(2,5-dimethyl-, S,S-dioxide, 2,5-Xylenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)di-, S,S-dioxide, 2,5-Xylenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)di-, S,S-dioxide (8CI), Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2,5-dimethyl- |
Safety & hazard information (GHS)
Signal word: Warning
Hazard statements
H315Causes skin irritationH319Causes serious eye irritationH335May cause respiratory irritation
Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501
Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.
Documents
Frequently asked questions
What is the CAS number of p-Xylenol blue, GR?
The CAS Registry Number of p-Xylenol blue, GR is 125-31-5. It is also known as p-Xylenolsulfonephthalein, Xylenol Blue, p-Xylenolsulfonphthalein.
What is the molecular formula and molecular weight of p-Xylenol blue, GR?
p-Xylenol blue, GR has the molecular formula C23H22O5S and a molecular weight of 410.5 g/mol. Its IUPAC name is 4-[3-(4-hydroxy-2,5-dimethylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-2,5-dimethylphenol.
Which grade and pack sizes of p-Xylenol blue, GR can I order?
We supply p-Xylenol blue, GR in AR (≥90%) grade, in 1 g, 5 g, 100 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.
Do you provide a COA and SDS with p-Xylenol blue, GR?
Yes. Every lot of p-Xylenol blue, GR is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.
Can p-Xylenol blue, GR be shipped internationally?
Yes. p-Xylenol blue, GR is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.
Enquire about p-Xylenol blue, GR
We reply within one business day with price, pack options, lead time and documentation.
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