Xylenol Blue

Also known as: P-XYLENOL BLUE, p-Xylenol Blue, p-Xylenolsulfonephthalein, p-Xylenolsulphonephthalein, 1,4-DIMETHYL-5-HYDROXYBENZENESULFONPHTHALEIN, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis(2,5-dimethylphenol), XYLENOL BLUE FREE ACID, XYLENOL BLUE, INDICATOR GRADE

Xylenol Blue (CAS 125-31-5) is a compound in the Solvents category listed in the Jingsj chemical database. It has the molecular formula C23H22O5S and a molecular weight of 410.48300 g/mol. Key properties include a melting point of 212°C (dec.), a boiling point of 577.2ºC at 760 mmHg, a density of 1.346 g/cm3 and a flash point of 302.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 125-31-5
Jingsj CID: J-13979-9
Molecular Formula: C₂₃H₂₂O₅S
Molecular Weight: 410.48300 g/mol
Category: Solvents
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	212°C (dec.)
Boiling Point	577.2ºC at 760 mmHg
Density	1.346 g/cm3
Flash Point	302.9ºC
Exact Mass	410.11900
PSA	92.21000
LogP	5.42300
Refractive Index	1.627

Customs & Trade Information

HS Code	2934991000
Summary	2934991000. sultones and sultams. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Xylenol Blue?

The CAS number of Xylenol Blue is 125-31-5.

What are the molecular formula and molecular weight of Xylenol Blue?

Xylenol Blue has molecular formula C23H22O5S and molecular weight 410.48300 g/mol.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Xylenol Blue (CAS 125-31-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-13979-9 (accessed 2026-11-07).

Data for reference only; verify product details with suppliers before purchase.