p-Xylenol blue, GR
p-Xylenol blue, GR (CAS 125-31-5) supplier Zemixal. Lab and bulk packs, batch COA, fast global delivery. Catalogue no. ZX-000676.
About p-Xylenol blue, GR
p-Xylenol blue, GR sits in our stains, Fluorescent Dyes & Histology Reagents section and ships worldwide from stock or short lead time. Identity at a glance (AR): CAS 125-31-5, formula C23H22O5S and molar mass 410.5 g/mol. Expect powder.
Use cases we see most often
- Histology & cytology staining
- Microscopy
- Clinical laboratories
- Indicator for titrations
Storage and safety notes
Literature values: melting point 212 °C (dec.). Hazard communication follows GHS (Warning: H315, H319 and H335). Our SDS lists exposure controls and first-aid measures.
Standard pack sizes are 1 g, 5 g, 100 g and 1 kg, and custom quantities are quoted on request. Each lot travels with a batch certificate of analysis and a 16-section SDS. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.
Typical uses
- Histology & cytology staining
- Microscopy
- Clinical laboratories
- Indicator for titrations
Applications
Grade guides
Specifications and identifiers
| Product name | p-Xylenol blue, GR |
|---|---|
| Catalogue number | ZX-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 |
| Molar mass | 410.5 g/mol |
| Exact mass | 410.1188 |
| Grade | AR |
| Purity / assay | ≥90% |
| Physical form | Powder |
| Appearance | Powder |
| Melting point | 212 °C (dec.) |
| XLogP3 | 4.5 |
| H-bond donors / acceptors | 2 / 5 |
| Topological polar surface area | 92.2 Ų |
| HS 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 |
| 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- |
Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.
Safety and GHS hazards
Signal word Warning
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May 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 summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.
Pack sizes
| 1 g | Quoted on request | |
| 5 g | Quoted on request | |
| 100 g | Quoted on request | |
| 1 kg | Quoted on request |
Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.
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